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The geographical distribution of sand flies in Brazil has been the subject of some studies, yet there is no information about the phlebotomine fauna in João Pessoa, State of Paraíba, Brazil. The aim of this work is to evaluate the occurrence and distribution of sand flies in the Atlantic forest fragments and to evaluate a possible dispersion in 06 nearby districts. Light traps were used during three consecutive nights, supplemented by an aspirator during the dry period and rainy season. A total of 222 sand flies were found, 143 (130 males and 13 females) in the Atlantic forest, and 79 in urban areas. During the entire dry season, three species of phlebotomine sand flies were recorded in 11 forest fragments, Lutzomyia longipalpis, Lu. migonei and Lu. whitmani. During the rainy season, only Lu. longipalpis was found. This was the only species identified in the studied neighborhoods during both seasons. The differences in diversity of sand flies encountered between natural habitats and urban areas may thus be correlated mostly with adaptations to particular habitats and availability of food. One species (Lu. longipalpis) appears to be rapidly adapting to urban areas because of deforestation.

Red calcareous algae create bio-aggregations ecosystems constituted by carbonate calcium, with two main morphotypes: geniculate and non-geniculate structures (rhodoliths may form bio-encrustations on hard substrata or unattached nodules). This study presents a bibliographic review of the order Corallinales (specifically, rhodoliths), highlighting on morphology, ecology, diversity, related organisms, major anthropogenic influences on climate change and current conservation initiatives. These habitats are often widespread geographically and bathymetrically, occurring in the photic zone from the intertidal area to depths of 270 m. Due to its diverse morphology, this group offers a special biogenic environment that is favourable to epiphyte algae and a number of marine invertebrates. They also include holobiont microbiota made up of tiny eukaryotes, bacteria and viruses. The morphology of red calcareous algae and outside environmental conditions are thought to be the key forces regulating faunistic communities in algae reefs. The impacts of climate change, particularly those related to acidification, might substantially jeopardise the survival of the Corallinales. Despite the significance of these ecosystems, there are a number of anthropogenic stresses on them. Since there have been few attempts to conserve them, programs aimed at their conservation and management need to closely monitor their habitats, research the communities they are linked with and assess the effects they have on the environment.

Maldanids are tube-building polychaetes, known as bamboo-worms; inhabit diverse marine regions throughout the world. The subfamily Euclymeninae was proposed to include forms with anal and cephalic plates, a funnel-shaped pygidium, and a terminal anus. Euclymene, the type genus of Euclymeninae, has about 18 valid species. Euclymene vidali sp. nov. is defined and members of the species described from Northeastern Brazil. Members of this species have 23 chaetigers, and one pre-pygidial achaetous segment; nuchal grooves extend through three quarters of the cephalic plate, and there is one acicular spine with a denticulate tip. Euclymene africana, and E. watsoni, are here recognized, respectively, as Isocirrus africana comb. nov., and I. watsoni comb. nov. Three monotypic genera are invalid: Macroclymenella, Eupraxillella, and Pseudoclyemene; their species should be recognized as Clymenella stewartensis com. nov., Praxillella antarctica com. nov., and Praxillela quadrilobata com. nov., respectively. An identification key and a comparative table for all species of Euclymene are provided. A comparative table for all genera of Euclymeninae is also furnished. The paraphyletic status of Euclymene and Euclymeninae is discussed. The taxon Maldanoplaca is not code compliant and should only be regarded as an informal name.

Three new species of Androdeloscia Leistikow, 1999 from the Brazilian Amazonian rainforest are described. Androdeloscia bicornuata sp. nov., A. paraleilae sp. nov., and A. micropunctata sp. nov. were distinguished from the 26 other species of the genus mainly based on the shape of male pleopod I endopod. Androdeloscia bicornuata sp. nov. differs from all the species in the genus by the complex morphology of the distal portion of the male pleopod I endopod bearing hyaline lamella and two horn-like tips. Androdeloscia paraleilae sp. nov. is characterized by the male pleopod I endopod with simple distal portion, without hyaline lamella, and apex represented by a curved tip and inner margin serrate proximally; and by the concavity on the lateral margin of the first maxilla (except for the A. leilae that is related to other listed characteristics). Androdeloscia micropunctata sp. nov. differs from the remaining species of the genus by the male pleopod I endopod with simple distal portion, without hyaline lamella, and apex truncate bearing a small acute tip in the outer corner; and 5+5 teeth on the first maxilla. Some characters related to the genus are later discussed.

Background: This study investigates the marine macroinvertebrate fauna of rhodolith beds (non-geniculated red corallinaceaous algae) in northeast Brazilian. A total of 57 species were identified, belonging to six phyla (Platyhelminthes, Annelida, Sipuncula, Mollusca, Arthropoda and Echinodermata), of which 50 are considered here as new records for the Paraíba State. Annelids (Class Polychaeta) were the most representative taxa in Miramar and Seixas Beaches, while molluscs were dominant in Maceió Beach., New Information: This is the first study that includes an identification key, diagnostic features and distribution patterns worldwide and local (including new records) of the marine invertebrate fauna associated with rhodolith beds in northeast Brazil (State of Paraíba). Sampling events were performed in 2018, at low tide in the intertidal to shallow subtidal zones (1.5 and 4.0 m depth), in Miramar, Seixas and Maceió Beaches. A total of 17 species were found for the first time on Seixas Beach, as well as all identified species for Miramar and Maceió. This study tries to contribute to the knowledge of marine invertebrates in northeast Brazilian shallow habitats, providing a baseline for future environmental studies., (Dimítri de Araújo Costa, Marina Dolbeth, Jessica Prata, Francisco de Assis da Silva, Geuba Maria Bernardo da Silva, Paulo Ragner Silva de Freitas, Martin Lindsey Christoffersen, Silvio Felipe Barbosa de Lima, Karina Massei, Reinaldo Farias Paiva de Lucena.)

Knowledge of living crinoids from Brazil is chiefly restricted to the contributions of Dr Luis Roberto Tommasi between the decades of 1950 and 1970. Herein we present an updated catalogue of the crinoids occurring along the Brazilian coast, including data on synonyms, type localities, type material, geographical distribution, bathymetric ranges, and occurrences of species along the coast. The data is based on an extensive revision of the literature and on a survey of several databases. A total of 20 species were catalogued, of which two are endemic (Phrixometra longipinna var. brasiliensis and Thaumatometra minutissima). According to information from the literature, P. longipinna var. brasiliensis represents an undescribed taxon. Although Brazil supports the greatest number of crinoid species in the Southwestern Atlantic, its crinoid fauna remains understudied and likely underestimated. Research on crinoids remains a subject of great potential, not only for taxonomy but also for other areas of knowledge.

The study presents a review of the Dendrochirotida species from shallow waters of the northeastern coast of Brazil. A total of 1,268 specimens were analyzed and 24 species were recorded, which were classified into 16 genera of Cucumariidae, Psolidae, Phyllophoridae, and Sclerodactylidae. Detailed descriptions and figures of the taxonomic characters are provided to facilitate species identification. Notes on morphological variation, geographic distribution, and habitat are also provided. We suggest two new species for science, Thyone brasiliana sp. nov. and Havelockia nietae sp. nov., the new combination Parathyone braziliensis (Verrill, 1868) and the first record of Euthyonidiella trita (Sluiter, 1910) for the Brazilian coast. The bathymetric ranges are expanded for Coronatum baiensis, Euthyonidiella trita, Stolus cognatus, and Thyonidium seguroensis.

Records of pycnogonids from Uruguayan waters (south-western Atlantic) include 26 species cited from precise locations, and at least five other species based on unconfirmed records. Nearly half of the species in that fauna belong to the genus Nymphon (12 spp.). Most species (22) come from deep-water and were recorded and described by C. A. Child. Of these, at least twelve species have an extended Antarctic and Subantarctic distribution, showing the influence of these cold waters in the area; three others have a wide deep-sea distribution pattern. Five species are known only from the lower slope and abyssal basin off La plata river: Mimipallene Atlantis and four species of Nymphon. Records from coastal and shelf areas (four species) are poorly documented and should be the focus of future research. Of these, Colossendeis geoffroyi is considered endemic in the Southwest Atlantic between 34ºS and 40ºS, but presents clear Antarctic affinities. A small-sized species living in shallow waters, Pycnogonum cessaci, is here considered as cryptogenic.

The class Echinoidea contains among the best-known echinoderms. The group has left the most complete fossil record of this phylum, and contains about 1000 living species, of which 51 are recorded along the Brazilian coast. Although the first record of echinoids in Brazil was made 369 years ago, the knowledge of this fauna remains quite unsatisfactory from a taxonomic and ecological point of view, particularly in the north and northeastern regions of the country. This study provides the first annotated list of echinoids from northeastern Brazil. The studied material largely belongs to collections of the Federal University of Paraíba (CIPY), Federal University of Sergipe (LABIMAR-UFS), Federal University of Bahia (MZUFBA), University of São Paulo (MZUSP), and National Museum of the Federal University of Rio de Janeiro (MNRJ). Thirty-two species from 29 genera, 18 families, and 10 orders were identified. Descriptions of species are provided. Highest diversities of Echinoidea were encountered for the states of Bahia (19 spp.), Alagoas (11 spp.), Paraíba (10 spp.), Ceará (7 spp.), Rio Grande do Norte (7 spp.), and Pernambuco (6 spp.). On the basis of the data analysed, Maranhão (2 spp.), Piauí (2 spp.), and Sergipe (3 spp.) have the lowest diversity. Sandy substrates and depths below 10 m were the least sampled areas over the continental shelf. Although the studied species are common, some taxonomic problems were encountered and discussed. We also provide ecological information and comments on status of the species from the studied region. As a result of this inventory, we were able to provide the first assessment of the echinoid fauna of northeastern Brazil.

The Brazilian coast is over 7000 km long. It is comprised of diverse environments such as reef, lagoons and mangroves. These diverse habitats support great biological diversity but, due to the extension of the coast, knowledge of the pycnogonid fauna is poor and fragmented. Records from Brazil began with Krøyer in the 1840s. Collections from Brazilian waters by the "H.M.S. Challenger" and "Vettor Pisani" expeditions were published by Hoek (1881) and Schimkewitsch (1888). For almost 50 years there were no further publications, until Marcus (1940c) published his comprehensive paper on the South American fauna. Publications peaked between the 1940s and 1960s, with papers by Marcus, Sawaya, Mello-Leitão, Corrêa, Du Bois- Reymond Marcus, Hedgpeth and Stock. Approximately 40 papers based on material from Brazilian waters were published at this time, which recorded 65 species for Brazil. The aim of the present work is to provide a checklist of the Brazilian pycnogonids while providing a historical review and a full account of the corresponding literature.

A new species in the previously monotypic genus Xiphoniscus Vandel, 1968, X. adisi sp. nov. is described. Both X. mirabilis Vandel, 1968 from Ecuador and X. adisi sp. nov. from Brazil occur in the Amazon rainforest. The new species shows a prolonged coxal plate II drawn out caudally, an autapomorphy of Xiphoniscus. Xiphoniscus adisi sp. nov. differs from X. mirabilis mainly in the characteristics of buccal appendages and male pleopods. A diagnosis of the genus Xiphoniscus is provided. The species Androdeloscia escalonai is reported from the Brazilian Amazon for the first time.

Pentamera paraibanensis sp. n. is described from more than 3000 specimens as a new species of Phyllophoridae from northeast Brazil, in the tropical southwestern Atlantic. It is distinguished from its congeners by the shape of the calcareous ring with moderate posterior processes, and by the tables in the body wall with a usually quadrilocular disc and a low, toothed spire composed of two pillars. The body is brown, with the tube feet in double rows per ambulacrum, and tentacles more lightly colored. The species was found inside rodoliths in large numbers. This paper contains a morphological description of the specimens, and an account of their habitat characteristics.

After an extensive search for the type specimens of Caecum floridanum Stimpson, 1851, we believe that these specimens may have been either lost or destroyed in the Chicago fire (1871). This paper presents a redescription of the species and a neotype is designated based on material from the type locality (Florida). Protoconch and growth stages of Caecum floridanum are described and illustrated herein. The teleoconch IV of Caecum floridanum is characterized by strong, wide, low, rounded, closely arranged axial ribs, except last three to four preceding the aperture, which are larger and more widely separated. Caecum compactum Dall, 1892 is here synonymized under Caecum floridanum. Caecum annulatum Emmons, 1858 and Caecum dux Folin, 1871 are not considered synonyms of Caecum floridanum in this report.

We synonymize Amphipholizona (Ophiolepididae) and Amphigyptis (Hemieuryalidae), suggest their transfer to family Amphiuridae, and propose a new species combination (Amphipholizona perplexa new comb.). We further provide a new diagnosis for the genus Amphipholizona, a dichotomic identification key for the two species now belonging to this genus and re-describe and illustrate for the first time some of the internal characters, such as the genital plates, vertebrae, and inner side of the lateral arm plate.

The genus Lepidonotus is the largest in number of species within the Polynoidae, with more than 70 described species and subspecies. A catalogue of 18 nominal species and subspecies of Lepidonotus from South America is provided, with valid names, synonyms and original citations. Redescriptions and illustrations of two species based on new specimens collected along the littoral of the State of Paraíba, northeastern Brazil are included. Lepidonotus carinulatus and Lepidonotus natalensis are reported for the first time for Brazilian waters. A comparative table of characters for all reported species and subspecies of Lepidonotus from South America is provided.

A new species of Anoplodactylus was discovered in coral reefs from the State of Paraíba, northeastern Brazil. A. mirim sp. nov. is very small and is characterized for having 3 teeth on the cheliphores and a very small cement gland. It belongs to the A. pygmaeus complex, which contains very small species. A. batangensis is recorded for the first time along the Brazilian coast, and A. eroticus is recorded for the first time in the South Atlantic. We record the fifth known case of gynandromorphism, the fourth for Anoplodactylus, based on two specimens of A. eroticus.

We redescribe Hemieuryale pustulata on the basis of 325 specimens obtained from the continental shelf off northeastern and southeastern Brazil. This is the first record of the species for Brazil. We illustrate for the first time details of the dental plate, oral plate, and vertebrae. Few morphological variations were observed in our extensive material. All specimens were associated with the gorgonian Nicella guadalupensis, suggesting an obligatory association in the Brazilian littoral. H. pustulata did not reveal a particular pattern of distribution on its host gorgonian, but larger gorgonians tend to support a larger number of ophiuroids. In addition to expanding the knowledge on morphology and ecology, we extend the known bathymetric distribution of the species, which is now known from 18 to 330 m.

This is a taxonomic work on the aspidochirotid sea cucumbers from shallow waters in Northeast Brazil. We studied 165 specimens, classified into 2 families, 3 genera, 7 subgenera and 9 species. Descriptions, illustrations and literature data are included for each species, in addition to ecological notes and information on their distribution in the northeast coast of Brazil. A taxonomic key is provided for the identification of the species.

Members of the polychaete taxon Sabellariidae Johnston, 1865 are known to live in sand tubes cemented onto rocky substrata, mollusk shells, or sea grasses. Of 37 known Sabellaria species, only nine were reported for the Brazilian coast, in all cases being associated with aggregates of other species. The genus is considered cosmopolitan. Herein we describe for the first time an aggregate of sabellariids composed by Sabellaria nanella and Sabellaria wilsoni. In addition, we describe a new species of Sabellaria. Lygdamis are represented by solitary species. None of the 17 known species were previously reported from the southwestern Atlantic Ocean. We report Lygdamis rayrobertsi for the first time in the South Atlantic.

Presently more than 1900 species of sea stars are recognized, of which 77 are recorded for the coast of Brazil. Although the first starfish record in Brazil was published 363 years ago, our knowledge of this fauna remains unsatisfactory from a systematic and ecological point of view, particularly in the north and northeastern regions of the country. This study provides the first annotated list of sea stars from northeastern Brazil. Material described herein is housed at the collections of the Federal University of Paraíba, Federal University of Sergipe, and the Federal University of Bahia, Museum of Zoology of the University of São Paulo and Museu Nacional do Rio de Janeiro. Twenty-one species were identified, belonging to 12 genera, 10 families, and 5 orders. Descriptions of species are provided. Three new occurrences were recorded for northeast Brazil: Astropectenalligator, Luidialudwigiscotti, and Mithrodiaclavigera. Highest diversities of Asteroidea were encountered for the states of Bahia (n = 14 spp), Paraíba (n = 12 spp) and Pernambuco (n = 9 spp). No species were recorded for the states of Maranhão and Sergipe. Sandy substrates and depths below 10 m were the least sampled areas over the continental shelf. Herein we provide a first panorama on the fauna of Asteroidea occurring in the northeast region of Brazil, hopefully to function as a basic reference for biodiversity studies in this poorly studied area.

Monokalliapseudes schubarti is an endemic tanaidacean microcrustacean from southeastern Brazil to Uruguay inhabiting low energy estuaries. Saco da Fazenda is located in the estuary of the Itajaí-Açú River, state of Santa Catarina, Brazil. It is exposed to strong anthropic impact and receives intensive flows of domestic wastewater, solid residues, and drainage activities. Specimens of M. schubarti were collected monthly, in the intertidal and subtidal regions of Saco da Fazenda, in four stations defined as a function of the physiography of the environment during the period of July 2003 to June 2004. Fecundity values were high, with continuous reproductive activity during the whole period of study. The greatest population densities were observed in the intertidal region, where they are nevertheless intensely consumed by birds, swimming crabs, and fish. This species represents a fundamental link in the food chain of Saco da Fazenda, transferring energy from the detritus level to higher trophic levels. Habitat disturbance and high organic matter may represent factors controlling the distribution of populations of M. schubarti. For this reason, the species may be used to monitor anthropic effects in estuarine areas.

We provide the first annotated checklist of ophiuroids from the continental shelf of the State of Paraíba, northeastern Brazil. Identification keys and taxonomic diagnoses for 23 species, belonging to 14 genera and 8 families, are provided. The material is deposited in the Invertebrate Collection Paulo Young, at the Federal University of Paraíba. Ophiopsila hartmeyeri represents the first record for the northeastern region of Brazil, while Ophiolepis impressa, Ophiolepis paucispina, Amphiura stimpsoni, Amphiodia riisei, Ophiactis quinqueradia, Ophiocoma wendtii and Ophionereis olivaceae are new records for the State of Paraíba. The number of species known for the state was increased from 16 to 23, representing approximately 17% of the species known for Brazil and 54% of the species known for northeastern Brazil. The recorded fauna has a large geographical and bathymetrical distribution.

The genus Diadema presently consists of seven species, two of which are known from the Brazilian coast: D. antillarum and D. ascensionis. The first is usually known for shallow coastal areas, while the second was apparently restricted to oceanic islands. In February 2011, a dense population of D. ascensionis was observed on the coastal reefs of Praia do Francês (Alagoas State, northeastern Brazil). Five specimens were collected and transported to the laboratory where morphological studies of the test and pedicellariae were conducted. Subsequently, visits were made to scientific collections in order to compare and confirm species identifications. Our observations confirm the presence of tridentate pedicellariae with narrow and strongly curved valves. The axial cavity in the tips of the spines is filled with dense nonreticular tissue. This taxonomic data confirms the occurrence of D. ascensionis in coastal areas. On the coastal reefs of Praia do Francês, animals were observed from the beach to the reef formations about 200 m offshore in areas with a sandy substrate and in reef cavities, usually in clear and well illuminated waters. Solitary individuals or groups of up to 15 individuals formed dense populations in the area. We stress the importance of pedicellariae for the specific identification of the Diadematidae, considering that they are quite constant and reliable at this taxonomic level. Our results demonstrate that D. ascensionis is not restricted to insular environments and that this species may be common in shallow coastal habitats.

Cephalobaenidae constitutes one of the main pentastomid groups infecting the respiratory tract of snakes. Six specimens of Liophis lineatus, a colubrid, were collected by active capture and pitfalls installed on the banks of the Batateiras river, close to its source, in the APA - Area de Proteção Ambiental (a protected environmental area of the IBAMA - Brazilian Institute for the Environment and Natural Resources), and in a remnant of the humid tropical forest FLONA - Floresta Nacional do Araripe, both in the municipality of Crato, state of Ceará, Northeast Brazil. Out of the six specimens of L. lineatus examined, only one had its lung infected by the pentastomid Cephalobaena tetrapoda. This represents the first record of C. tetrapoda as a parasite of a snake in Northeast Brazil, as well as the first record of a colubrid, L. lineatus, as a new host for the pentastomid in Brazil.

Total sequence phylogenies have low information content. Ordinary misconceptions are that character quality can be ignored and that relying on computer algorithms is enough. Despite widespread preference for a posteriori methods of character evaluation, a priori methods are necessary to produce transformation series that are independent of tree topologies. We propose a stepwise qualitative method for analyzing protein sequences. Informative codons are selected, alternative amino acid transformation series are analyzed, and most parsimonious transformations are hypothesized. We conduct four phylogenetic analyses of philodryanine snakes. The tree based on all nucleotides produces least resolution. Trees based on the exclusion of third positions, on an asymmetric step matrix, and on our protocol, produce similar results. Our method eliminates noise by hypothesizing explicit transformation series for each informative protein-coding amino acid. This approaches qualitative methods for morphological data, in which only characters successfully interpreted in a phylogenetic context are used in cladistic analyses. The method allows utilizing character information contained in the original sequence alignment and, therefore, has higher resolution in inferring a phylogenetic tree than some traditional methods (such as distance methods).

The positioning of the Pentastomida among the Metazoa has provoked many debates up to the present. On the other hand, the internal relationships among the pentastomid subgroups have received much less attention in the past. We provide the first phylogenetic analyses under Hennigian principles. Thirty-two morphological characters were selected from the primary literature, analyzed manually, and then with the program Hennig86. Four most parsimonious trees were obtained; these were analyzed by successive weighting and reduced to 1 consensus cladogram 380 steps long, with a consistency index of 0.98 and a retention index of 0.99. Characters were also analyzed as unordered, producing results that were congruent with the previous analyses. The internal groups were ordered according to the following system: (Heymnonsicambria + Haffnericambria + Backlericambria (Cephalobaenida (Railietiellida nov. (Reighardiida nov. (Porocephalida (Linguatuloidea (Linguatulidae + Subtriquetridae) + Porocephaloidea (Sebekidae + Porocephalidae))))))). This phylogenetic system is largely congruent with the first modern taxonomic arrangement proposed for the Pentastomida.

Abstract- A manual cladistic analysis, subsequently expanded with a PAUP computer analysis, was performed on 21 genera of the monophyletic taxon Pandaloidea. Morphological data were obtained from the literature for 146 of the 152 known species-group taxa and from specimens belonging to 11 genera and 15 species-those of Pantomus parvulus extending the known range from the North Western Atlantic to Uruguay. The taxon Physetocaridoidca was synonymized with Pandaloidea, and the genus Pandalopsis with "Pandalus". I have rejected reversal hypotheses indicated by the computer for four transformation series and chosen a final cladogram of slightly different topology which is six steps longer than the shortest tree. The cladogram for 20 terminal taxa is based on 108 apomorphic characters, resolved into 155 steps (72 synapomorphies and 83 homoplasies and reversals). The following sequenced phylogenctic classification is proposed: Pandaloidea; Pandalidae; Pantominae subfam.n.; Notopandalus [N. magnoculus]; Peripandalus [P. serratus]; Pantomus; P. ajfinis; P. parvulus; Pandalinae; Austropandalini trib.n.; Austropandalus [A. grayi]; Pandalina; P. brevirostris; P. profunda; Pandalini; Dichdopandalus; D. bonnieri; D. leptorerus; Pandalus: "Plcsionikidae" ["Plesionika"]; Heterocarpidae [Heterocarpus]; Heterocarpoididae fam.n. [Heterocarpoides] [H. levicarina]; Dorodoteidae fam.n. [Dorodotes] [D. reflexus]; Thalassocarididae; Chlorotocus; C. crassicornis; C. novaezelandiae; Chlorotocoides [C. spinicauda]; Thalassocaris;, T. obscura; T. crimia; T. lucida; Physetocandidae; Stylopandalus [S. richardi]; Chlorotocella; C. gracilis; C. leptorhjnehus; Physetocaris [P. microphthalma]; Chlorocurtis [C. jactans]; Anachlorocurtis [A, commensalis]; Miropandalus [M. hardingi]. Quotation marks indicate taxa of uncertain systematic status. Square brackets indicate redundant, phylogenetically uninformative, genus and species-level taxa maintained in the classification to comply with the principle of binominal nomenclature., (© 1989 The Willi Hennig Society.)

A manual cladistic analysis of the unnamed monophyletic taxon Alpheoidea plus Crangonoidea produced a cladogram containing 36 terminal taxa and 185 characters. The genealogical relationships of most of the 35 genera presently classified under the Hippolytidae have been resolved. Ten of these genera have been transferred, with the Processidae, from the Alpheoidea to the Crangonoidea. The concept of the Hippolytidae Bate, 1888 has been considerably restricted, the available names Lysmatidae Dana, 1852, Thoridae Kingsley, 1878, Hippolytinae Bate, 1888, and Latreutinae Ortmann, 1896 have been invalidated, and the new, family group names Barbouridae, Nauticarididae, Alopidae, and Bythocarididae are proposed. The traditional practice of naming monotypic taxa of suprageneric level has been avoided, yet all genealogical information indicated in the cladogram can be retrieved from the final classification proposed here for the Crangonoidea and Alpheoidea., (1987 The Willi Hennig Society.)