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Progomphus integer is one of four species of Gomphidae endemic to the Greater Antilles, reported for the Dominican Republic in references from the last Century. Recently, some authors suggested that the presence of this species in Hispaniola was doubtful, based on the lack of specific locality records. In this paper, we confirm the presence of the species in the Dominican Republic. Moreover, we provide the first specific localities with some notes of the habitats on which the species was collected.

El conocimiento acerca de la distribución de Odonata en Colombia ha aumentado, contribuyendo así a disminuir los vacíos de información en la distribución de algunos taxones. En este estudio, se reporta el género Peruviogomphus para Colombia con base en dos ninfas colectadas en el departamento del Amazonas y depositadas en la Colección de Macroinvertebrados Acuáticos de la Amazonia Colombiana (COMAC), del Instituto SINCHI. Este hallazgo actualiza los registros de Peruviogomphus en América del Sur. The knowledge about the distribution of Odonata in Colombia has increased thus contributing to reduce the information gaps in the distribution of some taxa. In this study, the Peruviogomphus genus is reported for Colombia, based on two nymphs collected in the Department of Amazonas and deposited in the Colección de Macroinvertebrados Acuáticos de la Amazonia Colombiana (COMAC), of the SINCHI Institute. This finding updates the records of the Peruviogomphus genus in South America.

Aim The present study tested the hypothesis that the composition of the odonate assemblages in environments with greater habitat integrity is significantly different from that of areas with reduced habitat integrity. Methods The samples were collected between April 2017 and November 2017 in eight streams in Caxias, in the Brazilian state of Maranhão. The habitat integrity index was used to quantify habitat integrity. The odonate specimens were collected by the fixed area scanning method. Results The habitat integrity index ranged from 0.265 to 0.915 at the different localities. A total of 229 specimens were collected, representing 19 odonate species. Species composition varied among streams that presented different degrees of conservation, with some species being typical of specific habitats. However, this variation had no effect on the number of taxa or the abundance of odonates, which may reflect the local substitution of extinct specialist species by generalists. Conclusions Evidence indicates that the reduction of habitat integrity is an important predictor of changes in the biodiversity of aquatic insects in streams such as those of the Cerrado-Caatinga ecotone. Resumo: Objetivo O presente estudo testou a hipótese de que a composição das assembleias de Odonata difere entre os riachos com maior integridade de habitat em relação aos de menor integridade. Métodos As amostras foram coletadas entre abril de 2017 e novembro de 2017 no período de estiagem, em oito córregos em Caxias, Maranhão. O índice de integridade do habitat foi usado para quantificar a integridade do habitat. Os espécimes de Odonata foram coletados pelo método de varredura de área fixa. Resultados O índice de integridade do habitat variou de 0,265 a 0,915 nos diferentes riachos. Um total de 229 espécimes foram coletados, representando 19 espécies Odonata. A composição das espécies variou entre os riachos que apresentaram diferentes graus de conservação, sendo que algumas espécies foram específicas para cada tipo de habitat. No entanto, esta variação não teve efeito sobre a riqueza de espécies ou a abundância de Odonata, o que pode refletir a substituição local de espécies especialistas por generalistas. Conclusões As evidências indicam que a redução da integridade do habitat é um importante preditor de mudanças na biodiversidade de insetos aquáticos em riachos como os do ecótono Cerra-Caatinga.

Erythemis Hagen, 1861 shows a considerable variation in genitalic characters, body coloration and wing venation. Since it is known that these traits are affected by different kinds of selection that probably blur their phylogenetic signal, we chose the genus Erythemis as a model taxon to analyze and compare the phylogenetic signal of these and other morphologic characters. A cladistic analysis was performed using ten species of the genus plus another seventeen species of Libellulidae as outgroup. Characters were defined following standard criteria and were managed using the software DELTA. Tree search was performed with the software NONA. Partitioned and combined analyses were conducted. Character tracking of characters with ri=100 was used to identify synapomorphies. In agreement with the literature, color characters provided strong phylogenetic signal, meanwhile, genitalia characters offered no synapomorphies. We did not find any character that could support the monophyly of Erythemis. The only clade that has strong support from the morphologic set of characters is (E. vesiculosa, (E. simplicicollis, E. collocata)). Contrary to the results found in other Odonata, wing characters offered synapomorphies for some Erythemis clades.

Resumen Se presenta una lista de especies y géneros de odonatos de ocho ríos de la Sierra Nevada de Santa Marta (SNSM) producto de la revisión de artículos científicos, trabajos de grado y especímenes depositados en el centro de Colecciones Biológicas de la Universidad del Magdalena (CEBUMAG). Se registran 38 especies distribuidos en 35 géneros en ocho familias. La familia Libellulidae presentó la mayor riqueza (14 géneros) y los rangos más amplios de distribución altitudinal (entre 50 y 2800 msnm), encontrándose en todas las coberturas vegetales. El río Gaira exhibió la mayor riqueza entre los ríos revisados, 26 géneros, de los cuales ocho son exclusivos de la cuenca, en tanto que en el río Ranchería solo se registró Progomphus. La distribución espacial más amplia fue la de los géneros Argia y Brechmorhoga, registrados en seis ríos. La revisión evidenció la falta de estudios en las vertientes oriental y suroccidental de la Sierra Nevada de Santa Marta, por lo que se recomienda realizar trabajos taxonómicos y de biodiversidad para contribuir al conocimiento de odonatos en el Caribe colombiano. © 2019. Acad. Colomb. Cienc. Ex. Fis. Nat. Abstract We raised a list of Odonata species and genera from eight rivers of the Sierra Nevada of Santa Marta (SNSM) after the revision of scientific articles, theses, and specimens deposited in the Centro de Colecciones de la Universidad del Magdalena (CEBUMAG). We found 38 species distributed in 35 genera and eight families. The Libellulidae family presented the greatest richness (14 genera) and the widest range of altitudinal distribution (between 50 and 2,800 m a.s.l.) found in all vegetable coverages. The Gaira River exhibited the greatest wealth among the revised rivers with 26 genera of which eight are exclusive to the basin while in the Ranchería River only Progomphus was registered. Argia and Brechmorhoga had a wide spatial distribution as they were recorded in six rivers. The review revealed the lack of studies on the eastern and southwestern slopes of the Sierra Nevada de Santa Marta, so it is recommended to carry out taxonomic and biodiversity work to contribute to the knowledge of Odonata in the Colombian Caribbean. © 2019. Acad. Colomb. Cienc. Ex. Fis. Nat.

Navicordulia aemulatrix sp. nov. (holotype male deposited in MZSP: Brazil, Santa Catarina State, [São Bento do Sul municipality, 26°14'58"S, 49°22'59"W], [railroad station] Rio Vermelho, II.1952) is described and illustrated based on three males. The long cercus (2.9-3.2 mm) places this species in the longistyla-group together with N. kiautai, N. longistyla and N. nitens but it differs from them mainly by the shape of cercus, with carinated part occupying 0.33 of cercus total length, and also by dorsal, ventro-medial and ventro-lateral tubercles developed. An unusual process on tergal portion of prothorax is reported for the first time in Navicordulia. The rate of description of new species of South American 'Corduliidae' is discussed. A map with records of Atlantic Forest Navicordulia species and a list of Brazilian corduliids by state are also presented. Navicordulia aemulatrix sp. nov. (holótipo macho depositado no MZSP: Brasil, estado de Santa Catarina, [município de São Bento do Sul, 26°14'58"S, 49°22'59"W], [estação ferroviária] Rio Vermelho, II.1952) é descrita e ilustrada com base em três machos. O cerco longo (2,9-3,2 mm), posiciona esta espécie no grupo longistyla juntamente com N. kiautai, N. longistyla and N. nitens, mas difere delas principalmente pelo formato do cerco, com a parte carenada ocupando 0,33 do comprimento total e também pelos tubérculos dorsal, ventro-mediano e ventro-lateral desenvolvidos. Um processo incomum na porção tergal do protórax é mencionado pela primeira vez em Navicordulia. Além disso, a taxa de descrição de novas espécies Sul-Americanas de 'Corduliidae' é discutida. Um mapa com os registros das espécies de Navicordulia da Mata Atlântica e uma lista por estado dos corduliídeos brasileiros são também apresentados.

Heteragrion luizfelipei sp. nov. from Santa Catarina, Heteragrion gracile sp. nov. from Minas Gerais) and Heteragrion mantiqueirae sp. nov. from São Paulo are described and illustrated. The color and structural characters that distinguish these species from those of Selys group 2 are discussed. The holotype of Heteragrion dorsale Selys, 1862 is redescribed and illustrated. Heteragrion luizfelipei sp. nov. de Santa Catarina, Heteragrion gracile sp. nov. de Minas Gerais e Heteragrion mantiqueirae sp. nov. de São Paulo são descritos e ilustrados. São descritos os caracteres estruturais e de cor que distinguem essas espécies daquelas descritas no grupo 2 de Selys. O holótipo de Heteragrion dorsale Selys, 1862 é redescrito e ilustrado.

Present study was conducted to study seasonal abundance and distribution of dragonflies in upper Siran valley district Mansehra Pakistan. To collect data, eleven localities were visited for three consecutive years (2016-2018). Results come up with a sum of 300 specimens identified under three families, eight genera and twenty species. Highest seasonal abundance recorded during summer and spring were 80.67% and 13.33% respectively while minimum 6.00% was recorded during early autumn. Dominant species observed were, Orthetrum chrysis (14.00%), followed by O. gluacum (12.00%), Palpoleura sexmaculata sexmaculata (11.33%) and O. cancellatum cancellatum (8.00%). However the highest population of dragonflies was found in Munda Gucha with a percentage of 11.33 followed by Jabbar (11.00%) and Sachan (9.67%). The lowest populations were recorded in Suham (6.00%), Dadar (7.67%) and Jabori (7.67%). The surveyed valley showed diverse Anisopterous fauna and thus further extensive surveys are recommended that can come up with more important species from the area. Resumo O presente estudo foi realizado para verificar a abundância sazonal e a distribuição de libélulas no vale superior de Siran, distrito de Mansehra, Paquistão. Para a coleta de dados, 11 localidades foram visitadas por três anos consecutivos (2016-2018). Os resultados apresentaram uma soma de 300 espécimes identificados em três famílias, 8 gêneros e 20 espécies. A maior abundância sazonal registrada durante o verão e a primavera foi de 80,67% e 13,33%, respectivamente, enquanto o mínimo de 6% foi registrado no início do outono. As espécies dominantes observadas foram Orthetrum chrysis (14%), seguido por O. gluacum (12%), Palpoleura sexmaculata sexmaculata (11,33%) e O. cancellatum cancellatum (8%). No entanto, a maior população de libélulas foi encontrada em Munda Gucha (11,33%), seguida por Jabbar (11%) e Sachan (9,67%). As populações mais baixas foram registradas em Suham (6%), Dadar (7,67%) e Jabori (7,67%). O vale pesquisado mostrou fauna Anisopterous diversificada, e, portanto, recomenda-se a realização de mais pesquisas que possam apresentar mais espécies importantes da área.