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Copyright of Boletín Latinoamericano y del Caribe de Plantas Medicinales y Aromáticas is the property of Universidad de Santiago de Chile and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Background and aims: Our research on neotropical Selaginella led us to examine a collection from the Atlantic Forest of Serra do Peito-de-Moça, Bahia, Brazil, initially determined as S. muscosa but with unusual features, indicating it represented an undescribed species. We also reexamined the taxonomic and nomenclatural status of three Selaginella taxa previously described from Brazil and gathered information on introduced and naturalized species in the country. M&M: Morphological analysis used stereomicroscopes and scanning electron microscopy to distinguish the suspected new species from its morphologically nearest ally. Results: We confirmed that the plant material from the Atlantic Forest of Serra do Peitode-Moça, Bahia, Brazil, is a new species that we named Selaginella pectopuellensis (Selaginellaceae). Additionally, we clarified the taxonomic and nomenclatural status of three Selaginella species previously described from Brazil and provided more information on naturalized taxa. Overall, we expanded the confirmed number of native Brazilian Selaginella species to 91 and confirmed six introduced and naturalized taxa in the country. Conclusions: The description of S. pectopuellensis adds to our knowledge of Brazil's pteridophyte flora. We synonymized S. kriegeriana under S. magnafornensis and clarified that S. bahiensis subsp. bahiensis and S. bahiensis subsp. manausensis should not be recognized as separate taxa. We also confirmed six naturalized Selaginella taxa in Brazil. [ABSTRACT FROM AUTHOR]

The distribution pattern of a taxon is a consequence of historical and contemporary processes—specifically ecological and evolutionary processes—which tend to result in distributional congruence among species that respond similarly to the same processes. This congruence leads to the establishment of areas of endemism that are important for delimiting biogeographic regions. In the Neotropical region, different definitions of area of endemism have been proposed based on the distributional patterns of mammal species, each according to different methods and assumptions. In this study, we aimed to identify areas of endemism of Neotropical mammals, represented by 361 species of Placentalia (Xenarthra, Chiroptera, and Carnivora) and Marsupialia (Didelphimorphia and Paucituberculata), using an endemicity analysis implemented by the software NDM (eNDeMism software) and a hierarchical cluster analysis based on Simpson's beta dissimilarity metric (βsim). The results suggest alternative spatial configurations within northern and southern parts of the Neotropics along transition zones. Additionally, there are indications of more restricted areas of endemism throughout the Neotropical region and with more species supporting the areas, such 1 area located in the region corresponding to the Atlantic forest and 2 areas corresponding to Mexican transition zone. The study enhances our understanding of Neotropical mammal biogeography and underscores the importance of using primary distribution data. Previous studies found 82 endemic species based on range maps, whereas our analyses identified 172 endemic species, including 125 that are newly proposed as such, and also confirmed the existence of 47 previously reported endemic species. [ABSTRACT FROM AUTHOR]

The Sierra Madre del Sur (SMS) concentrates the greatest plant diversity in Mexico (9,524 species) and 10% of the endemism. And 8.3% of its surface is covered by Natural Protected Areas (NPAs). Strategies to create NPAs are based on identifying biodiversity hotspots to preserve the maximum number of species with the least resources. Areas with high biodiversity reflect geographic patterns and evolutionary processes useful for designing NPAs. The objectives were: were 1) to identify Priority Areas for Conservation (PACs) in the SMS based on taxonomic richness, endemism, and phylogenetic diversity, and 2) to seek the geographic congruence of the identified PACs with current NPAs. In a 10 x 10 km grid cell, indices of taxonomic richness, weighted endemism, and phylogenetic diversity were calculated for a set of 9,524 species. Furthermore, consensus areas of endemism were identified for a total of 1,133 endemic species. In the SMS, 33 consensus areas of endemism were rescued, and the taxonomic richness, weighted endemism, and phylogenetic diversity were heterogeneous and 94% correlated. Similarly, 27 PACs were identified. Three NPAs completely cover four PACs, 12 PACs are partially found in three NPAs, and in 38 Areas Voluntarily Designated for Conservation (AVDCs). Finally, 12 identified PACs are not found within any NPA. In the SMS it is necessary to promote the establishment of new NPAs or AVDCs that protect with high plant diversity. [ABSTRACT FROM AUTHOR]

A new species of Vaejovis is described for Michoacan, Mexico belonging to the nigrescens/nitidulus group, the less diverse group of species from the genus. This species has a preference for synanthropic environments and inhabits rock walls within the city limits. Additionally, the pictures of the hemispermatophore are presented and characters are named according to new terminology. This species is named honoring Dr. Gabriela Castaño Meneses for her great contributions to arthropods research in Mexico and the world. [ABSTRACT FROM AUTHOR]

A new species, Miconia garagoana, from riparian environments of the northern Cordillera Oriental of Colombia, is described. This is the second species exclusive to rheophytic conditions that grows in the Andean forest in Colombia and is characterized by the presence of stellate-lepidote trichomes on young structures and inflorescences, terminal inflorescences, 4-merous (rarely 5-merous) flowers, oblong-subulate anthers with an apical pore and 2-locular ovary. The differences with other rheophytic species occurring in Colombia are noted and it is argued that it is related to other Andean species with bluish-green ripe fruits such as M. squamulosa and M. symplocoidea. This new species is so far known only from Colombia and its threat category is suggested as Critically Endangered" (CR). [ABSTRACT FROM AUTHOR]

Here we describe and illustrate Pleroma canastrense sp. nov and Pleroma viscosa sp. nov. two new species of the Melastomateae tribe from Serra da Canastra National Park, Minas Gerais, Brazil. We also provide an updated identification key for the members of the tribe that occur in this Protected Area. Pleroma canastrense sp. nov. has coriaceous leaves, broadly ovate to orbicular leaf blade, entire and adpressed-strigose margin, 11–17 basal acrodromous veins, and flowers with white petals. Pleroma viscosa sp. nov. has the younger branches, both side of the leaf blade, bracteoles, hypanthium, and sepals, densely covered by viscous trichomes, as well as prominent secondary veins on the abaxial surface of the blade. Both species have stamens with a short pedoconnective and an inconspicuous ventral appendage. In addition to the descriptions of new species, we present comments, geographic distribution data, conservation status and images of plants in the field. We recommend that P. canastrense and P. viscosa should be included as of 'Least Concern' (LC) in the IUCN Red List. [ABSTRACT FROM AUTHOR]

A new species from the Malesherbia sect. Malesherbia is described for the department of Lima, Peru. Malesherbia anxia is found in arid areas of the valley of the Chancay River (Huaral, Lima), on the western slope of the Andes, between 1,580 to 2,600 m. This species has morphological affinities with M. weberbaueri and M. splendens. A key for the identification of other related species is presented, accompanied by a comparative table of diagnostic morphological characters. With this taxonomic novelty, the number of Malesherbia species in Peru rises to 14, of which 12 are endemic. [ABSTRACT FROM AUTHOR]

Background: Floristic inventories record the species observed in a particular region and serve as fundamental contributions to understanding biotic resources. Jalisco stands out as one of the Mexican states with significant floristic diversity. However, ongoing additions, documented through exploratory efforts, and periodic taxonomic revisions highlight the importance of maintaining an up-to-date inventory of vascular plants. Questions: What is the diversity, endemism and distribution of the vascular flora in Jalisco? Studied species: Tracheophytes. Study site and dates: Jalisco; September 2020 to February 2024. Methods: An updated list was compiled through a literature, review of herbarium specimens (IBUG) and electronic databases available online. Total richness was estimated for the state and for each municipality. Taxonomic diversity and species complementarity indexes between municipalities were estimated. Results: The vascular flora in Jalisco encompasses 242 families, 1,623 genera, and 7,110 species. Among these, there are 3,310 species endemics to Mexico, 412 species endemic to Jalisco, and 390 exotic species. The municipalities with the highest species diversity are Autlán de Navarro, Cuautitlán de García Barragán, and La Huerta. Conclusions: The vascular flora of Jalisco is the fourth richest in Mexico. The increasing numbers of diversity, endemism, and even introduced species emphasize the ongoing need to document the flora of Mexico.

Las aves son un componente importante de la biodiversidad y la descripción de su diversidad es esencial para su conservación y la de sus hábitats. En la zona de estudio, las investigaciones enfocadas en la fauna son escasas y el caso de las aves no es la excepción, por lo que se requiere información básica para trabajar en su conservación. El objetivo del presente estudio fue evaluar la riqueza, estructura, composición, dominancia, abundancia y diversidad de la avifauna del río Sinaloa, en el municipio de Guasave, Sinaloa. Los muestreos se desarrollaron de marzo a noviembre de 2023 utilizando una combinación de los métodos de transecto en franja y de puntos de conteo de radio fijo. Se registraron 172 especies de aves y un total de 15,521 individuos, clasificados en 130 géneros, 51 familias y 21 órdenes. La mayoría de las especies son no comunes o moderadamente comunes. El 65% de las especies son terrestres, asimismo, el 60.5% son residentes permanentes. 23 especies tienen alguna categoría de endemismo y 20 están protegidas por las normas mexicanas. Los índices de diversidad de Shannon-Wiener (H´ = 3.79) y Simpson (1-D = 0.954) indican que la avifauna en el área de estudio presenta diversidad alta. Asimismo, el índice de Margalef (Dmg = 17.72) demuestra también una riqueza alta. Los estimadores no paramétricos Chao 1 y ACE arrojan una eficiencia de muestreo del 95.6%, lo cual es muy aceptable. Los resultados obtenidos podrían servir como base de futuros estudios enfocados en la conservación del ecosistema estudiado.

El ratón de montaña (Thomasomys niveipes) es un roedor neotropical endémico de Colombia y exclusivo de la Cordillera Oriental, el cual presenta una dieta generalista que incluye insectos, hojas y hongos. Basados en observaciones directas presentamos el primer registro documentado del consumo de la seta calamar (Clathrus archeri) por parte del ratón de montaña (Thomasomys niveipes) en la cordillera Oriental de Colombia. Esta nota contribuye significativamente al conocimiento de la dieta de T. niveipes, así como genera nuevos interrogantes sobre la dispersión de esporas de la seta exótica C. archeri.

The Serra do Cachimbo is a highland area at the southeastern portion of the Amazon Forest drained by the headwaters of tributaries of rios Xingu and Tapajós. It is known as an area of high level of endemism of fish, low species diversity, and very few taxa with broad distribution in the other parts of the Amazon. Despite its biogeographical importance, there are still many poorly sampled areas. Four expeditions to the region yielded in the rediscovery of a poorly known, endemic species, Hyphessobrycon cachimbensis, and the discovery of a similar, allopatric undescribed congener, frequently misidentified as H. cachimbensis. We provided the redescription of H. cachimbensis and the description of the new species. Both can be differentiated from most congeners by having a conspicuous longitudinal dark stripe on body and anal-fin base convex in males, due to thicker musculature insertion in the region. Other diagnostic features are mostly related to counts of scales and fin rays. [ABSTRACT FROM AUTHOR]

Paepalanthus is a diverse genus characteristic of the campos rupestres, a megadiverse vegetation found on mountaintops of mainly quartzitic mountain ranges of central-eastern Brazil. Recent efforts on prospecting the biodiversity of Serra do Padre Ângelo, a small mountain complex in eastern Minas Gerais, yielded several new plant and animal species, highlighting the urgency of conservation actions towards this still unprotected area. Here, we describe yet another new species found in the campos rupestres of these mountains, Paepalanthus magnus, a mountaintop microendemic species morphologically similar to taxa found in the Espinhaço Range, over 200 km distant, a biogeographic pattern shared by several other species. The affinities of the new species are discussed, and we provide illustrations, photographs, and SEM photomicrographs of the seed. We also discuss the conservation status of the species, which is preliminarily assessed as Critically Endangered, reinforcing the urgent need to address the conservation of the unique biodiversity of Serra do Padre Ângelo. [ABSTRACT FROM AUTHOR]

Nototriche chancoae, a new species from the Andes of Lima, Peru, is described and illustrated. This species is related to N. glacialis, N. nigrescens and N. congesta in having flabellate laminae, hairy hypophyllum, inner side of the hairy calyx towards the apex of the lobes and corolla with tube present; It is distinguished by having wider vaginas and the outer side of the calyx with glabrous tube. The description, illustration and photographs of the new species are included, as well as a dichotomous key to the Nototriche species most similar in morphology to N. chancoae. [ABSTRACT FROM AUTHOR]

Austrocylindropuntia pachypus (K.Schum.) Backeb. is an endemic cactus of Peru, whose known distribution was restricted to the western slopes of La Libertad, Áncash, and Lima. Based on botanical expeditions along the Andean foothills of Ica, this study reports new localities with small populations, thereby extending the known distribution of A. pachypus by over 260 km to the south. Additionally, based on 42 georeferenced records, information on its localities, populations, potential distribution, habitats, threats, and conservation status is expanded. The potential distribution model exhibited high predictive or suitability levels with AUC values of 0.96 based on seven climatic variables, with Bio17, Bio2, and Bio7 being the most contributory variables; Lambayeque, La Libertad, Áncash, Lima, Ica, and Huancavelica demonstrated the highest suitability values. Populations with the highest concentration of individuals, yet significantly disturbed by anthropogenic activities, are those in the valleys of the Chillón River (Santa Rosa de Quives, Canta) and Rímac River (Santa Eulalia, Huarochirí) in Lima. Furthermore, it is estimated that approximately 70% of A. pachypus populations are threatened by mining rights, hydrocarbon extraction, overgrazing, and urban or agricultural expansion, exacerbating habitat fragmentation. Hence, it is proposed to categorize this endemic cactus as Endangered (EN). [ABSTRACT FROM AUTHOR]

In its most recent concept, the genus Cheilanthes encompasses three clades distributed across South America, Africa, and Australasia. Previous studies in Peru recorded 23 species; however, advancements in molecular systematic have led to the segregation of eight of them into at least three genera. In this study, 15 species are recognized in the Peruvian flora based on the examination of 459 herbarium and field specimens, and the evaluation of morphological characters using 131 specimens. The affinities among the lineages proposed in this study are consistent with recent phylogenetic hypotheses, wherein Cheilanthes species in Peru are members of two clades, the South American and the Australasian-South American, with taxonomically important characters being the shape of rhizomatous scales and types of frond indumentum (scales, microscales, scuamules, and hairs). We found that the genus Cheilanthes is present in 20 departments of Peru, with most species having wide distribution in the central-southern Andean regions, four species having endemic status. Meanwhile, C. cantangensis, C. lonchophylla, and C. obducta are poorly represented in the northern region. The first two species are considered endemic and categorized as Endangered (EN), while the other two are classified as Least Concern (LC). Additionally, a taxonomic key is provided. [ABSTRACT FROM AUTHOR]

Background and aims: Dioscorea is the most morphologically diverse, species-rich and widely distributed genus of the family Dioscoreaceae. Dioscorea trifurcata is a poorly known species with two specimens collected in 1910 and 1916 in Catamarca province, Argentina. But recently, the species was cited for Brazil, and populations were located near the type locality. With new collections available, the purpose of the article is to update aspects of the morphology, habitat and distribution of D. trifurcata. M&M: Specimens newly collected in Catamarca province were analyzed and identified to species using specific bibliography and by comparison with the original material of Dioscorea trifurcata and from other specimens of Dioscorea at different herbaria. Results: A detailed morphological description of Dioscorea trifurcata is provided along with illustrations, photographs and a geographic distribution map. The presence of the species in Brazil is questioned. Conclusions: The rediscovery of Dioscorea trifurcata opens the possibility of conducting new studies based on multiple lines of evidence to corroborate the delimitation and distribution of the species. The importance of regional herbaria and of having recent and complete collections of poorly-known species for the inventory and conservation of biodiversity is highlighted. [ABSTRACT FROM AUTHOR]

Antecedentes: Altas Cumbres es un área natural protegida ubicada en el centro del estado de Tamaulipas, la cual no ha sido suficientemente estudiada. A pesar de que las leguminosas son una familia bien representada en la zona, hasta ahora, no se habían realizado estudios que dieran a conocer su riqueza y distribución. Preguntas: ¿Cuántas y cuáles especies de leguminosas se encuentran en el área de estudio y cómo se distribuyen en un gradiente ambiental? Especies de estudio: Familia Fabaceae. Sitio y años de estudio: Altas Cumbres, Tamaulipas, México, de 2022 a 2023. Métodos: Se colectó material botánico y se identificó taxonómicamente utilizando bibliografía especializada; además de revisar ejemplares de herbario y bases de datos en línea. Se realizó un análisis de similitud con los sitios estudiados, utilizando el índice de Jaccard para obtener la diversidad β y observar su distribución en un gradiente ambiental. Resultados: Se registro un total de 132 especies, pertenecientes a 57 géneros y tres subfamilias de Fabaceae. La subfamilia Papilionoideae presento la mayor diversidad (86 especies / 37 géneros), seguidas por las Caesalpinoideae (41/18) y por último las Cercidoideae (5/2). Las plantas herbáceas fueron dominantes con respecto a las leñosas. La mayoría de las especies se registraron en un rango de altitud entre los 300 a 499 m snm, en matorral submontano y bosque de pino-encino. Conclusiones: Altas Cumbres es un reservorio importante para las leguminosas de Tamaulipas y de la Sierra Madre Oriental, considerando su alta riqueza y endemismo (33 especies restringidas para México).

Como resultado de un proyecto destinado al manejo sostenible de la lepidopterofauna, se socializa la relación taxonómica de las mariposas (Lepidoptera: Papilionoidea) registradas en el Parque Botánico de Camagüey, Cuba y se ofrecen datos sobre su presencia en diferentes épocas del año, con vistas a seleccionar aquellas más propicias para ser criadas en el mariposario, que se encuentra todavía en proceso de construcción. Durante los años 2021 y 2022, se realizaron muestreos mensuales en diferentes espacios del área de estudio, lo que permitió identificar 56 táxones infraespecíficos, pertenecientes a 48 géneros, 15 subfamilias y cinco familias (Papilionidae, Nymphalidae, Pieridae, Lycaenidae y Hesperiidae). El endemismo a nivel específico alcanzó el 3.57 % y en el ámbito subespecífico llegó a ser del 8.92 %, por lo que el 12.5 % de los táxones tienen distribución limitada al territorio nacional. Se comprobó que 35 de las especies/subespecies reportadas, están presentes tanto en los meses de lluvia como en los de sequía (índice de similitud de Jaccard del 62.5 % entre ambas épocas), lo que se identifica como una potencialidad para fomentar la crianza de las mismas. De acuerdo al estudio realizado, se ofrecen, en un primer intento, argumentos sobre la selección de las especies para la cría.

Oxalis sect. Holophyllum (Oxalidaceae) is a small group of species that is endemic to the Brazilian Atlantic Forest in the states of Rio de Janeiro, Minas Gerais, Espírito Santo, and Bahia. Species of the section can be recognized by their unifoliolate leaves, one-seeded carpels, and the common presence of dorsiventrally flattened (and sometimes winged) peduncles and/or petioles. Circumscriptions of the currently accepted species needed to be revaluated, as the overlap in several features have blurred limits among morphologically similar taxa. In this study we evaluate the monophyly and phylogenetic relationships among species of O. sect. Holophyllum, and provide an updated taxonomic study of the section, aiming at improving species circumscriptions and facilitating species-level identification. For this task, we analyzed samples from herbaria and carried out fieldwork to observe the plants in loco, collect samples, and gather material for DNA extraction, amplification, and sequencing. Bayesian and maximum likelihood phylogenetic analyses were performed using sequences from three markers: nrITS, and plastid trnL-trnF, and petA-psbJ from 13 of the 17 currently accepted species, which corroborate the monophyly of the section. Among the species of O. sect. Holophyllum, ten are newly described here at species level: O. adpressipila Fiaschi & Bilk (based on O. kuhlmannii Lourteig var. adpressipila Lourteig), O. capixaba Fiaschi & Bilk, O. cornicarpa Fiaschi, O. inopinata Fiaschi & Bilk, O. itamarajuensis Fiaschi & Bilk (based on O. alata Mart. ex Zucc. var. hirta Lourteig), O. leonii Fiaschi & Bilk, O. occulta Fiaschi & Bilk, O. retrorsa Fiaschi & Bilk, O. sciophila Fiaschi & Bilk, and O. septentrionalis Fiaschi & Bilk. Lectotypes are chosen for nine names, and an epitype for O. impatiens Vell. An identification key to all species is provided, as well as descriptions, illustrations, geographic distribution maps, and preliminary conservation statuses following IUCN guidelines. Oxalis sect. Holophyllum (Oxalidaceae) é um pequeno grupo de espécies endêmicas à Mata Atlântica dos estados do Rio de Janeiro, Minas Gerais, Espírito Santo e Bahia. Espécies da seção podem ser reconhecidas pelas folhas unifolioladas, carpelos unisseminados, e geralmente pela presença de pedúnculos e/ou pedicelos achatados dorsiventralmente ou, às vezes, alados. As circunscrições das espécies atualmente aceitas precisam ser reavaliadas, já que a sobreposição observada em vários caracteres mascara limites entre táxons morfologicamente similares. Neste estudo nós investigamos o monofiletismo e as relações filogenéticas entre espécies de O. sect. Holophyllum e fornecemos uma atualização taxonômica da seção, com o intuito de aprimorar as circunscrições das espécies e facilitar a sua identificação. Para atingir esses objetivos, nós analisamos amostras de herbários e conduzimos expedições a campo para observar as plantas in loco, coletar amostras e recolher materiais para a extração, amplificação e sequenciamento de DNA. Análises filogenéticas bayesianas e de máxima verossimilhança foram conduzidas a partir de sequências do ITS (nuclear) e do trnL-trnF e petA-psbJ (plastidiais) de 13 das 17 espécies atualmente aceitas, o que corroborou o monofiletismo da seção. Entre as espécies de O. sect. Holophyllum, dez são pela primeira vez descritas em nível específico: O. adpressipila Fiaschi & Bilk (baseada em O. kuhlmannii Lourteig var. adpressipila Lourteig), O. capixaba Fiaschi & Bilk, O. cornicarpa Fiaschi, O. inopinata Fiaschi & Bilk, O. itamarajuensis Fiaschi & Bilk (baseada em O. alata Mart. ex Zucc. var. hirta Lourteig), O. leonii Fiaschi & Bilk, O. occulta Fiaschi & Bilk, O. retrorsa Fiaschi & Bilk, O. sciophila Fiaschi & Bilk e O. septentrionalis Fiaschi & Bilk. Lectótipos são escolhidos para nove nomes e um epítipo para O. impatiens Vell. Uma chave de identificação para todas as espécies é fornecida, bem como descrições, ilustrações, mapas de distribuição geográfica e análises preliminares do status de conservação segundo as normas da IUCN. [ABSTRACT FROM AUTHOR]

Objective. To determine the prevalence of helminth infection in Trichomycterus nigromaculatus captured in environments defined from the physicochemistry of the Gaira River, in Minca, Sierra Nevada de Santa Marta, Colombia. Material and Methods. We collected 476 specimens of T. nigromaculatus covering both climatic periods of the area, which were dissected to analyze the visceral cavity. Isolated parasites were fixed in 10% formalin for subsequent clarification. The specimens were identified by observation of adult stages under a stereoscopic microscope after clarification. Results. Specimens were found exclusively from the genus Spirocamallanus (Nematoda), the species Spirocamallanus sp. parasitic prevalence ranged from 0% in August to 28.57% in April with an abundance of 1.09 worms/host. Environmental parameters such as dissolved oxygen (Mean:5.65 mg. L-1, Max:7.5 mg. L-1, Min:4.41 mg. L-1); pH (Mean:7.2, Max: 9.3, Min: 5.7) and conductivity (Mean:72.82 µs.cm-1, Max: 123.7 µs.cm-1, Min: 40 µs.cm-1) presented statistically significant differences, the environment is eutrophicated. Conclusions. Spirocamallanus sp. were described in the areas of presence of the parasitic association in T. nigromaculatus, which constitutes a new record for the Colombian Caribbean and an extension of the geographic distribution and host range of the nematode. [ABSTRACT FROM AUTHOR]

Copyright of Ornitologia Colombiana is the property of Asociacion Colombiana de Ornitologia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Sigmae is the property of Universidade Federal de Alfenas (UNIFAL-MG) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Reduction in population size, with its predicted effects on population fitness, is the most alarming anthropogenic impact on endangered species. By introducing compatible individuals, genetic rescue (GR) is a promising but debated approach for reducing the genetic load unmasked by inbreeding and for restoring the fitness of declining populations. Although GR can improve genetic diversity and fitness, it can also produce loss of ancestry, hampering local adaptation, or replace with introduced variants the unique genetic pools evolved in endemic groups. We used forward genetic simulations based on empirical genomic data to assess fitness benefits and loss of ancestry risks of GR in the Apennine brown bear (Ursus arctos marsicanus). There are approximately 50 individuals of this isolated subspecies, and they have lower genetic diversity and higher inbreeding than other European brown bears, and GR has been suggested to reduce extinction risks. We compared 10 GR scenarios in which the number and genetic characteristics of migrants varied with a non‐GR scenario of simple demographic increase due to nongenetic factors. The introduction of 5 individuals of higher fitness or lower levels of deleterious mutations than the target Apennine brown bear from a larger European brown bear population produced a rapid 10–20% increase in fitness in the subspecies and up to 22.4% loss of ancestry over 30 generations. Without a contemporary demographic increase, fitness started to decline again after a few generations. Doubling the population size without GR gradually increased fitness to a comparable level, but without losing ancestry, thus resulting in the best strategy for the Apennine brown bear conservation. Our results highlight the importance for management of endangered species of realistic forward simulations grounded in empirical whole‐genome data. [ABSTRACT FROM AUTHOR]

The páramo ecosystem is a significant centre of Andean bird diversity with high concentrations of threatened species. The Macizo del Cajas Biosphere Reserve's páramos are a district of the biogeographic páramo province of northern Andes and are therefore considered a conservation hotspot with representative bird diversity. To enhance regional conservation efforts, comprehensive inventories of bird species that occupy this páramo are required. We present an updated bird inventory for the páramos of Macizo del Cajas and included validated records from eBird and GBIF databases along with records from continuous monitoring across this páramo landscape for five years. We also provide notes on habitat affinity and important new, rare, restricted range, and threatened birds. We report 112 bird species within the reserve, including five endemics, and three globally and 12 nationally threatened species. Finally, we discuss the use of habitat affinities as indicators of biodiversity patterns in páramo to improve conservation tools for key habitats. [ABSTRACT FROM AUTHOR]

A new species of Telipogon (Orchidaceae, Oncidiinae) is described based on two collections found in the seasonally dry forests in Piura department, Peru. Telipogon mariae-luisae is morphologically similar to T. chachapoyensis, an allopatric species recorded in the Amazonas department, from which it differs by floral dimensions, labellum pilosity, and number of petal veins. The new species is described, and illustrations, photographs, discussion, plus a key to morphologically related species are provided. [ABSTRACT FROM AUTHOR]

Objetivo. Determinar la prevalencia de infección por helmintos en Trichomycterus nigromaculatus capturados en ambientes definidos desde la fisicoquímica del Río Gaira, en Minca, Sierra Nevada de Santa Marta, Colombia. Material y Métodos. Se recolectaron 476 ejemplares de T. nigromaculatus abarcando ambos períodos climáticos de la zona, los cuales fueron diseccionados para analizar la cavidad visceral. Los parásitos aislados fueron fijados en formol al 10% para su posterior aclaración. Los ejemplares fueron identificados a través de observación de estadios adultos al microscopio estereoscópico posterior a su aclaración. Resultados. Se encontraron ejemplares exclusivamente del género Spirocamallanus (Nematoda) la especie Spirocamallanus sp. La prevalencia parasitaria osciló entre 0% en agosto a 28.57% en abril con una abundancia de 1.09 vermes/hospedador. Parámetros ambientales como oxígeno disuelto (Promedio:5.65 mg. L-1, Max:7.5 mg. L-1, Min:4.41 mg. L-1); pH (Promedio:7.2, Max: 9.3, Min: 5.7) y conductividad (Promedio:72.82 µs.cm-1, Max: 123.7 µs.cm-1, Min: 40 µs.cm-1) presentaron diferencias estadísticamente significativas, el ambiente se comportó como eutrofizado. Conclusiones. En las áreas de presencia de la asociación parasitaria fueron descritos Spirocamallanus sp., en T. nigromaculatus constituye un nuevo registro para el Caribe colombiano y una ampliación de la distribución geográfica y del rango de hospedadores del nemátodo.

Introducción y objetivos: Dioscorea es el género más diverso morfológicamente, más rico en especies y con mayor distribución de la familia Dioscoreaceae. Dioscorea trifurcata es una especie poco conocida, con dos ejemplares recolectados en 1910 y 1916 en la provincia de Catamarca, Argentina. Sin embargo, recientemente la especie fue citada para Brasil y se localizaron nuevas poblaciones en cercanías a la localidad tipo. En virtud del nuevo material disponible, este artículo tiene por finalidad actualizar aspectos de la morfología, hábitat y distribución de D. trifurcata. M&M: Los nuevos ejemplares recolectados en la provincia de Catamarca se analizaron e identificaron a especie utilizando bibliografía específica y por comparación con el material original de Dioscorea trifurcata y de otros ejemplares de Dioscorea en diferentes herbarios. Resultados: Se brinda una descripción morfológica detallada de Dioscorea trifurcata junto con ilustraciones, fotografías y un mapa de distribución geográfica. Se pone en duda la presencia de la especie en Brasil. Conclusiones: El redescubrimiento de Dioscorea trifurcata abre la posibilidad de realizar nuevos estudios basados en múltiples líneas de evidencia para corroborar la delimitación y distribución de la especie. Se destaca la importancia de los herbarios regionales y de contar con colecciones recientes y completas de especies poco conocidas para el registro y conservación de la biodiversidad.

Antecedentes: Gentianaceae está representada por 18 géneros y 90 especies en México. El género Geniostemon y 46 especies son endémicas. La familia está incluida en tratados taxonómicos y listados florísticos de diversos estados y regiones de México, sin embargo, la región de Nueva Galicia carece de una revisión para el grupo. Preguntas: ¿Cuántos y cuáles géneros y especies de la familia Gentianaceae hay en Nueva Galicia? ¿Cuáles son sus características ecológicas y fenológicas de Gentianaceae en la zona de estudio? Especies de estudio: La familia Gentianaceae. Sitio y año de estudio: Nueva Galicia, 2018-2022. Métodos: El trabajo se desarrolló en cinco fases: 1) obtención del listado preliminar de especies, 2) consulta de ejemplares de herbario, 3) elaboración de matriz de datos a partir de la información de las etiquetas de ejemplares de herbario, 4) exploración y recolección en campo y 5) análisis de la información. Resultados: En Nueva Galicia, Gentianaceae está representada por nueve géneros, 25 especies y dos variedades. Concentra su mayor diversidad en sitios húmedos de bosques templados, en un rango de elevación de 1,500-2,500 m. Gentianaceae florece y/o fructifica a lo largo de todo el año, pero se encontraron más taxones con estructuras reproductivas en octubre y noviembre. Conclusiones: La riqueza de Gentianaceae encontrada posiciona a Nueva Galicia como la zona de mayor diversidad de esta familia con respecto a otros proyectos florísticos en México.

Antecedentes: En la revisión de Gonolobus para México se observó que G. fuscus, G. luridus y G. tingens carecen de los apéndices estaminales y anillo faucal típicos del género. Los ejemplares observados de estas especies tienen tricomas glandulares tornándose cristalinos y blancos con la edad y la corona ginostegial doble característicos de Polystemma, por lo que se propone su transferencia a este género. Preguntas: ¿Los datos morfológicos apoyan la transferencia de las especies aquí estudiadas de Gonolobus a Polystemma? ¿Las plantas aquí estudiadas son coespecíficas a alguna de las especies conocidas para Polystemma? Especies de estudio: G. fuscus, G. luridus y G. tingens. Sitio y años de estudio: México. Métodos: Se revisaron los protólogos, las imágenes digitales del material tipo, los ejemplares de herbario de las especies de Gonolobus consideradas y la literatura pertinente. Las especies bajo estudio se compararon morfológicamente con las especies mexicanas conocidas dentro de las Gonolobinae, empleando para ello el concepto cohesivo de especie. Resultados: Se propone la transferencia a Polystemma de dos de las especies de Gonolobus aquí estudiadas, así como la sinonimización de Gonolobus tingens Decne., Gonolobus suberifer B.L. Rob., Matelea suberifera y M. crenata. Conclusiones: Con estos ajustes taxonómicos, Polystemma alcanza las 14 especies, resaltando a México como el principal centro de diversidad del género.

Se entregan nuevos antecedentes sobre las dos especies de Dorcatominae conocidas del archipiélago Juan Fernández, Chile. Se redescribe a Serianotus atronotatus y se aportan datos morfológicos complementarios para la hembra de Masatierrum impressipenne. Se señalan aspectos de variación intraespecífica, asociaciones con plantas hospedantes y distribución geográfica y temporal de estas especies.

Se analiza el área de distribución del género Megaleas, se registra por primera vez para Colombia y se describe una nueva especie Megaleas angelae n. sp. En Altaquer- Nariño, Sur de Colombia, con base en material depositado en la colección entomológica del Instituto de Ciencias de la Universidad Nacional de Colombia Sede Bogotá. Se discuten diferencias entre Megaleas syrna y la nueva especie.

Cuban biodiversity is characterized by high species richness and endemism; however, free-living flatworms have been neglected in studies of the fauna of the archipelago. These animals constitute an essential component of marine and freshwater ecosystems as top predators and secondary producers. In this contribution, we provide the first comprehensive analysis of turbellarian diversity in Cuba based on a long-term sampling effort in marine, brackish, freshwater and terrestrial environments. We used observed and estimated species richness as indicators of alpha diversity. As a result, we have collected, for the first time, 279 species in Cuba, including 189 species of rhabdocoels, 33 species of polyclads, 21 species of macrostomorphs, 14 species of proseriates, 12 species of prolecithophorans, seven species of triclads and one representative each of Prorhynchida, Gnosonesimida and Bothrioplanida. At least 184 species (67%) are new to science. Fifty of these species have been recorded in published journal contributions. The remainder are pending formal identification and/or description. We demonstrate the turbellarian fauna of Cuba to be one of high diversity and endemism. Estimated species richness is much higher than that observed, exemplifying the taxonomic impediments and stressing the need for more intense sampling campaigns in the archipelago. [ABSTRACT FROM AUTHOR]

We provide the first comprehensive assessment of the Greater Antilles butterfly fauna from a molecular perspective. We gathered COI barcodes for 82% of the archipelago's 367 species. Barcodes perform relatively well for species identification. A barcode gap separates 83% of the 270 species (represented by at least two sequences) from its nearest neighbour (NN). Of the 31 species represented by single barcodes, 26 have minimum distances from their NN above 2%. Maximum intraspecific distances are higher than 2% for 57 species (21%); however, values are lower within single islands suggesting that a part of these species has evolved into endemic lineages overlooked or unrecognized until today. Barcodes are diagnostic for only 80 of the currently accepted 180 subspecies represented by at least two sequences suggesting numerous conflicts with the infraspecific classification and highlighting its subjectivity. For 20 species, and several subspecies within them, we propose a split into two or more species and elevating several subspecies to the species category. Other data sources including novel or previously ignored morphological characters of adults and immature stages, natural history and/or additional nuclear sequences support these taxonomic changes. [ABSTRACT FROM AUTHOR]

Eptesicus innoxius (Gervais, 1841) is a vespertilionid bat commonly known as harmless brown bat or harmless serotine. It is a small bat, with woolly, short dorsal fur (5–6 mm), that is brown to pale grayish brown; the sagittal and lambdoidal crests are very low or absent. Eptesicus innoxius occurs in lowlands west of the Andes, with a geographic distribution restricted to northwestern and southern Ecuador, and northwestern Peru, at elevations from sea level to 1,200 m. It is listed as "Near Threatened" (NT) by the International Union for Conservation of Nature because of a suspected population reduction due to a significant decline of habitat where the species occurs. Resumen : Eptesicus innoxius (Gervais, 1841) es un vespertiliónido conocido como murciélago marrón inofensivo, murciélago marrón del Pacífico o serótino inofensivo. Es un murciélago de tamaño pequeño, de pelaje suave y corto (5–6 mm); de color dorsal pardo a pardo grisáceo, y cuyas crestas sagital y lambdoidal están poco desarrolladas o ausentes. Eptesicus innoxius es endémico del occidente de América del Sur, con distribución restringida al noroccidente y sur del Ecuador, y el noroccidente de Perú, con un intervalo altitudinal que abarca desde el nivel del mar hasta los 1,200 m s. n. m. Está catalogado como "Casi Amenazado" (NT) por la Unión Internacional para la Conservación de la Naturaleza (UICN), debido a una probable reducción poblacional a causa de una disminución significativa del hábitat en el área de ocurrencia de la especie. [ABSTRACT FROM AUTHOR]

Beaucarnea inermis is an endemic species from Northeast Mexico, in the states of San Luis Potosí and Tamaulipas. It is appreciated as an ornamental plant, so its populations are subject to the poaching of individuals for illegal trade. Previous studies determined that their populations have been affected due to the disturbance since the incidence of anthropogenic activities affects the viability of the species. Here we determine the current conservation status ofB. inermis and identify their main risk factor by performing an extinction risk assessment based on the Annex II "Method for Evaluation of Risk of Extinction of Plants in Mexico". We studied 10 populations of B. inermis from protected and non-protected areas in San Luis Potosí and Tamaulipas. We considered the MER criteria: A) geographical distribution characteristics, B) habitat characteristics, C) intrinsic biological vulnerability, and D) impact of human activity. Using field and analyzed data, the MER assessment gives 1.91 points that confirm B. inermis is correctly classified as an Endangered species. The natural protected areas where the species occurs represent cores for its protection; however, the surface of these areas may not be sufficient without biological corridors that connect them. [ABSTRACT FROM AUTHOR]

La familia Asteraceae está bien representada en los Andes y, en particular, en el ecosistema de la jalca, un pastizal altoandino; sin embargo, son exiguos los trabajos desde el enfoque etnobotánico. Se evaluó la importancia cultural de las especies de esta familia en una localidad de Cajabamba. Se aplicaron tres métodos para la evaluación etnobotánica, el listado libre, caminatas etnobotánicas y entrevistas semiestructuradas. Fueron 31 las especies útiles registradas, agrupadas en siete categorías de uso. Las categorías Medicinal y Social agruparon los mayores números de especies con 26 y 22 especies, respectivamente. Catorce fueron nuevos registros de especies útiles para la jalca y nueve eran endémicas para el Perú. Las especies Senecio collinus y Barnadesia dombeyana se registraron como las de mayor versatilidad de usos, mientras que Barnadesia dombeyana, Baccharis alaternoides, Gynoxys cara-censis y Gynoxys ferreyrae fueron las que obtuvieron los mayores valores de importancia cultural. Se concluye que la riqueza de Asteraceae útiles presentes en la jalca es mayor de la que se conocía en este ámbito, y que algunas de las especies medicinales de mayor importancia cultural presentan los mismos usos registrados en otras localidades altoandinas.

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RESUMO Cyrtopodium R. Br. é um táxon neotropical com 50 espécies, das quais 37 estão presentes no Brasil, especialmente no Cerrado, seu centro de diversidade e endemismo. Trabalhos sobre o gênero no país resumem-se à literatura clássica, a um tratamento sinóptico, a descrição de novas espécies e a listagens florísticas. Apresentamos uma sinopse taxonômica para os taxa de Cyrtopodium ocorrentes no munucípio de Niquelândia, Estado de Goiás, Brasil. Foram encontradas 14 espécies (C. blanchetii, C. braemii, C. brandonianum, C. brunneum, C. cristatum, C. confusum, C. eugenii, C. paludicolum, C. poecilum, C. saintlegerianum, C. triste, C. vernum, C. virescens e C. withnerii), dentre as quais C. confusum é interpretada como a primeira ocorrência para o Estado de Goiás. Tais espécies são contrastadas por meio de uma chave de identificação, têm suas distribuições geográficas e relações morfológicas comentadas e são representadas por imagens. Cyrtopodium confusum, a novidade aqui registrada, é descrita e tem sua distribuição mapeada.

Background: Coccoloba is a Neotropical genus of trees, shrubs, and lianas with approximately 150 species. Reviwed Mexican specimens of Coccoloba do not correspond to any recognized species within the genus, so they are proposed as new species. Question: What are the morphological characteristics that differentiate the two new species from other Coccolobaspecies? What is its distribution and conservation status? Studied species: Species of Coccoloba sect. Coccoloba endemic to Mexico. Study site and dates: Chiapas and Veracruz, Mexico, 2022-2023. Methods: All available information for Coccoloba, including herbarium specimens and online databases, was reviewed. Subsequently, a comparative analysis was carried out including the two new species proposed and the recognized species in the genus. Geographic distribution maps were prepared and the conservation status of the new species was determined, following the IUCN guidelines. Results: Coccoloba burkeae and C. najarroi are described and illustrated as new species. Both are endemic to Mexico. C. burkeae is distributed in the humid forests of the Tuxtlas region in Veracruz and is morphologically similar to C. barbadensis, C. hondurensis and C. spicata; this species is considered in the Endangered (EN) category. C. najarroi is restricted to the humid forests of Chiapas and is similar to C. ascendens and C. ibarrae. This species is considered Critically Endangered (CR). Conclusions: The morphological characteristics of the fruit, the inflorescence and the leaves are important to diagnose the two new species of Coccoloba; both being endemic to Mexico.

Antecedentes: Se realizaron salidas de campo a Puebla y se encontró una planta trepadora perteneciente a Gonolobus que no coincidía morfológicamente con ninguna otra especie del género. Aquí se propone una nueva especie y se compara con las especies de G. cuajayote y G. jaliscensis. Preguntas: ¿Son nuevas para la ciencia las plantas de Gonolobus colectadas en la Sierra de Tentzo, Puebla? ¿Cómo se distinguen de otras especies del género, cuál es su distribución y estado de conservación? Especies de estudio: Gonolobus sp. nov. Sitio y años de estudio: Parque Estatal Sierra del Tentzo, estado de Puebla, México. Métodos: Se realizó la descripción y análisis morfológico de las plantas. Con base en el concepto cohesivo de especie se comparó con taxones afines y se generó la clave de identificación. Se estableció una categoría de vulnerabilidad para la especie. Resultados: Gonolobus volcanicus se propone como una especie nueva para México. La especie se distingue por la densa pubescencia de la corola y anillo faucial, la forma de los apéndices dorsales de las anteras, así como por su distribución. Se proporciona la descripción morfológica de la especie nueva, imágenes, mapa de distribución geográfica y estado de conservación. Se incluye una clave de las especies de Gonolobus presentes en Puebla, junto con las especies similares. Conclusiones: Gonolobus volcanicus se reconoce como una especie nueva para la ciencia. Este descubrimiento incrementa a 46 el número de especies de Gonolobus registradas para el país y representa la primera especie del género endémica de Puebla.

One new species of scorpion is described from the high lands of the Trans-Mexican Volcanic Belt province in the Mexican state of Jalisco; this species inhabit the pine forest of the Sierra de Quila mountain range. It is assigned to the “mexicanus” group and compared with other species geographically closer or morphologically similar, besides biology. The species honors Dr. Tila María Pérez Ortiz for its great career in arachnology. [ABSTRACT FROM AUTHOR]

Chrysochlamys montieliae, a new species of the Clusiaceae family, Clusioideae subfamily, Clusieae tribe, from the Cordillera Azul National Park, Department of Loreto, is described and illustrated. Following the IUCN criteria, we propose to categorize it as Data Deficient (DD), since it is only known from the type locality. In addition, their relationships with related species are discussed. [ABSTRACT FROM AUTHOR]

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Copyright of Caldasia is the property of Universidad Nacional de Colombia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Ecological factors such as temperature, precipitation, and vegetation type have been reported to influence biogeographic patterns (e.g. species distribution, richness, and endemism) in mammals. In Chile, these patterns only had been explored in selected mammal groups from certain localities. In this study, we describe and analyze biogeographic patterns for all small mammals (marsupials, armadillos, bats, rodents), reported until 2020, in different climatic and ecological regions from continental Chile. Using a compiled database of 89 species, we estimated their distributional similarity, described and characterized richness and areas of endemism using Bayesian and Parsimony Analysis of Endemism, and linked species distribution with conservation status according to the IUCN Red List. We found three similarity units of species distribution based on climate: Arid, Temperate, and Polar; higher richness and endemism in north and south-central Chile; two areas of endemism, one in north and one in south; and a hotspot in south-central Chile. Finally, species of greater conservation concern showed a similar and small distribution range. The concordance in the distribution of the species with Chilean climatic regions (as determined by precipitation and temperature) suggest that the spatial distribution of Chilean small mammals is influenced strongly by those abiotic factors. This also could explain the patterns of richness and endemism and, therefore species hotspots. Variations of climatic factors therefore should be considered in explaining biogeographic patterns and conservation plans of Chilean small mammal species, because species of greater concern tend to be associated and having similar distributional characteristics. [ABSTRACT FROM AUTHOR]

In the tropical Americas, the Orthosiinae (Apocynaceae) comprises plant species with small but intricate flowers and harbours a tremendous, still understudied diversity currently classified in four genera, Jobinia, Monsanima, Orthosia and Scyphostelma. In this study, we describe and illustrate four new species of Scyphostelma: S. bolivianum, S. gracile, S. rotorum and S. solomonii, based on specimens collected in Bolivia and Peru. Phylogenetic analysis places S. bolivianum and S. gracile in a clade with S. harlingii, a species from southern Ecuador and central Peru, together as sister clade to the rest of Scyphostelma. Due to the size of flowers and the long-filiform peduncles and pedicels, we consider the two new species S. rotorum and S. solomonii and the new combination S. erikseniae a part of the S. harlingii group, for which an identification key is presented. Furthermore, four species names are lectotypified and six new combinations in Scyphostelma are made: S. fasciculiflorum, S. jaramilloi, S. purpurascens, S. quitense, S. stenospira and S. unguiculatum. Citation: Pineda Y. M., Keller H. A., Balderrama-Torrico J. A., Meve U., Nürk N. M. & Liede-Schumann S. 2023: Phylogenetics in Scyphostelma (Apocynaceae: Orthosiinae) and description of new species. – Willdenowia 53: 83–112. Version of record first published online on 5 September 2023 ahead of inclusion in August 2023 issue. En las Américas tropicales, Orthosiinae (Apocynaceae) comprende especies de plantas con flores pequeñas pero complejas y alberga una alta diversidad, aún poco estudiada, actualmente clasificada en cuatro géneros: Jobinia, Monsanima, Orthosia y Scyphostelma. En este estudio, describimos e ilustramos cuatro especies nuevas de Scyphostelma: S. bolivianum, S. gracile, S. rotorum y S. solomonii, con base en especímenes recolectados en Bolivia y Perú. El análisis filogenético ubica a S. bolivianum y S. gracile en un clado con S. harlingii, una especie del sur de Ecuador y el centro de Perú, juntas como clado hermano del resto de Scyphostelma. Debido al tamaño de las flores y a los pedúnculos y pedicelos filiformes largos, consideramos a las dos nuevas especies S. roturum y S. solomonii y la nueva combinación S. erikseniae una parte del grupo S. harlingii, para el cual se presenta una clave de identificación. Además, se lectotipifican cuatro nombres de especies y se realizan seis nuevas combinaciones en Scyphostelma: S. fasciculiflorum, S. jaramilloi, S. purpurascens, S. quitense, S. stenospira y S. unguiculatum. [ABSTRACT FROM AUTHOR]

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The commensals on Chilean Decapoda of inland waters are characterized by a marked microendemism. The aim of the present study was to do an exhaustive review on the ectocommensals on Chilean inland-water decapods. The literature revealed the presence of species of Protozoa, viz., eight known only from Parastacus pugnax (Lagenophrys andos , Operculigera insolita , O. parastacis , O. seticola , O. striata , O. taura , Chilenophrys allendei , and Circolagenophrys shiftus), one for both P. pugnax and P. nicoletti (L. anticthos), one for Parastacus pugnax and Samastacus spinifrons (O. asymmetrica), and one reported for Aegla laevis (O. velata). In addition, the presence of flatworms was described, specifically Temnocephala chilensis , associated with A. laevis , P. pugnax , and S. spinifrons , and species of Polychaeta, i.e., Stratiodrilus platensis associated with A. abtao and A. bahamondei , S. aeglaphilus for A. laevis , and S. pugnaxi for P. nicoletti. Biogeographical, ecological and taxonomic implications are discussed. [ABSTRACT FROM AUTHOR]