Marcos Tavares

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• PhD
• Professor (Associate) at University of São Paulo

Johngarthia lagostoma is a terrestrial crab species endemic to a limited number of oceanic islands in the south Atlantic Ocean, separated by hundreds or thousands of open seas, namely Rocas Atoll, Fernando de Noronha, Trindade and Martin Vaz, and Ascension. Such a narrow distribution range adds to the vulnerability of this species. The remoteness o...

The Indo-West Pacific region serves as the primary habitat for the majority of extant hexapodid crabs. The hexapodids boast a rich evolutionary history dating back to the Cretaceous, marked by a significant radiation throughout the Cenozoic, while the Paleocene–Miocene of tropical America emerges as a pivotal center of radiation, evidenced by repor...

Identifying cryptic species and juveniles in the Ophiuroidea has always been a challenge. However, post-larval developmental studies have the potential to uncover the identity of these cryptic species and juveniles, as they offer valuable information that is not often found in adults. Although the importance of studying growth series is well-known...

Three new cave-dwelling aeglid species from the Alto Ribeira karst region, south-eastern Brazil, are described. Morphological descriptions are based on traits traditionally used in aeglid taxonomy. Molecular phylogeny reconstruction based on the partial fragments of the 16S ribosomal RNA (16S rDNA) and the cytochrome oxidase subunit I (COI) reveale...

A new species of Aegla is described and illustrated from Alto Paranapanema (São Paulo State), a sub-basin of the Paranapanema watershed. The new species is compared to all seven species of Aegla currently known from the Paranapanema watershed using both morphological and mitochondrial genetic (COI) characters. Molecular sequence comparison analysis...

The limited temporal completeness and taxonomic accuracy of species lists, made available in a traditional manner in scientific publications, has always represented a problem. These lists are invariably limited to a few taxonomic groups and do not represent up-to-date knowledge of all species and classification. In this context, the B Brazilian meg...

Increasing habitat modification and species loss demand consistent efforts to describe and understand biodiversity patterns. The BIOTA/FAPESP Program was created in this context and it has been a successful initiative to promote studies on biodiversity and conservation in Brazil. The BIOTA/Araçá is an interdisciplinary project that provided a detai...

Benthic samples collected from depths ranging between 686 and 2410 m along the Brazilian continental upper slope from Rio de Ja-neiro State to Santa Catarina State (23°S to 27°S) yielded a wealth of tanaidacean material, including two new species of Stenotanais. This is the first described species of the family Akanthophoreidae from Brazilian water...

The brittle stars of the family Ophiocomidae inhabit shallow waters and coral reefs of tropical regions. The species of Ophiocoma are difficult to identify due to high morphological variation, especially when different stages of development are observed. Here, based on morphological analyses, two Brazilian morphotypes of Ophiocoma were studied and...

Five anomuran and one brachyuran species collected from continental shelf and slope off southern Brazil have their geographic ranges considerably extended southward: Neolithodes agassizii (Smith), Paguristes spectabilis McLaughlin and Provenzano, Pagurus heblingi Nucci and Melo, Phimochirus occlusus (Henderson), Mixtopagurus paradoxus A. Milne-Edwa...

Santana et al. (2022) described a new genus and species of fossil crab, Chronocancer camilosantanai, from carbonate concretions of the Romualdo Formation of the Araripe Sedimentary Basin. The journal in which the description appeared was published online only and the new name did not include a ZooBank registration number (LSID), as required for val...

The invasive sun corals Tubastraea spp. were introduced to Brazil in the late 1980s. The invasion prompted rapid changes in seascapes and local biological communities by excluding native species, particularly sessile ones. However, little is known about the impact on the mobile invertebrates. Using an experimental approach this study investigated t...

Intraspecific variation of the gross morphology of the retractor muscle was studied in 60 specimens of Parathyone braziliensis and 17 specimens of Thyonidium seguroensis. Specimens were dissected to expose the retractor muscle or were analyzed by micro-computed tomography. Early expectations that the point of origin of the retractor muscle at the l...

Apesar de descender de ancestrais fortemente calcificados, o endoesqueleto dos holoturóides é reduzido e composto por ossículos microscópicos e um anel composto por placas calcárias conectadas por tecido conjuntivo. O anel calcário é uma estrutura complexa e a falta de conhecimento aprofundado sobre a sua evolução tem gerado interpretações ambíguas...

Espécimes de Pseudoboletia têm sido regularmente encontrados em águas brasileiras desde 2012, especialmente em áreas de proteção ambiental. A identidade destes espécimes permanece desconhecida devido à ausência de características morfológicas diagnósticas e à falta de dados moleculares das espécies atlânticas. O aparecimento súbito deste ouriço-do-...

Intraspecific variation of the gross morphology of the retractor muscle was studied in 60 specimens of Parathyone braziliensis and 17 specimens of Thyonidium seguroensis . Specimens were dissected to expose the retractor muscle or were analyzed by micro-computed tomography. Early expectations that the point of origin of the retractor muscle at the...

Lissosabinea tridentata (Pequegnat, 1970) known hitherto from the Gulf of Mexico off Florida (24°N) and only western Atlantic representative of the genus, is reported here for the first time from much further south, Brazil off the coast of Espírito Santo, Vitória-Trindade Seamount Chain, Montague Bank (20°S), between 310 and 391 m. A second western...

The caridean shrimp Tuleariocaris neglecta Chace, 1969, is reported from the Alcatraz Archipelago (24°S, off the coast of southeastern Brazil) in association with the sea urchin Astropyga magnifica Clark, 1934. This finding significantly increases the known range of this species from 20°S to 24°S. An overview of the species in Tuleariocaris with th...

Forty species of shore and shallow water brachyuran crabs are reported from the remote oceanic Archipelago Trindade and Martin Vaz (TMV), 11 of which were previously known from Trindade Island, 28 are recorded from the Archipelago for the first time, and one is a new species, Epialtus parvulus sp. nov. This brings the total known shore and shallow...

A new brachyuran crab genus and species, Chronocancer camilosantanai, is described from carbonatic concretions of the Romualdo Formation of the Santana Group, Araripe Sedimentary Basin, northeastern Brazil. Chronocancer camilosantanai n. gen. n. sp. is provisionally assigned to the Orithopsidae. The new genus is superficially suggestive of the orit...

The phyllophorids Phyllophorella robusta, Selenkiella siamense and Cladolella virgo, as well as the sclerodactylid Clarkiella discoveryi, are the type species of their respective genera, all described by Heding & Panning (1954) and each known only from a single specimen, were revisited in order to reassess their morphology by means of optical and e...

The types of nominal species of Echinodermata in the collection of the Museu de Zoologia, Universidade de São Paulo are catalogued: Holothuroidea (19 species-16 holotypes, 1 paratype and 2 neotypes) and Ophiuroidea (4 species-1 neotype and 3 paratypes). Photographs of all the type specimens are given. A brief account of the history of the MZUSP's e...

Since the taxonomic revision of the Ophidiasteridae by H.L. Clark (1921), in which 20 genera were recognized as valid, several new genera and species were included in this family, and the boundaries between some of them became largely arbitrary. This also applies to Narcissia Gray, 1840, whose morphology and taxonomy are still very poorly understoo...

The spider crabs Willinachoides santanai n. gen. n. sp. from the early-middle Miocene of north Brazil and Paradasygyius rodriguezi n. sp. from the late Miocene of Venezuela are described and illustrated. Additionally, Eoinachoides senni Van Straelen, 1933, from the late Oligocene–early Miocene of Venezuela, is redescribed based on photographs of th...

The land crab Johngarthia lagostoma is endemic to the Atlantic oceanic islands of Ascencion, Trindade and Martin Vaz, Fernando de Noronha and the Rocas Atoll. A previous study found significant genetic structure in J. lagostoma between the oceanic islands of Trindade and Fernando de Noronha/Rocas Atoll. Likewise, the first stage zoea, herein descri...

Gonopods are phylogenetically important morphological characters, and in several cases providing diagnostic characters to support taxonomic and phylogenetic studies. Relatively few studies, however, have emphasized in-depth descriptions of gonopods, and the functional morphology of these structures are poorly understood. We use SEM to describe and...

The French carcinologist and oceanographer Alain Crosnier (1930–2021) had a most influential role in modern carcinology. This tribute reviews his contributions to organising oceanographic expeditions; expanding collections of specimens, particularly from the deep sea; and supporting international collaboration for taxonomic investigations of the ri...

A new species of deep-water brachyuran crab, Euphrosynoplax dincao, from southeastern Brazil is described and illustrated. The genus Euphrosynoplax currently consists of two species, E. clausa Guinot, 1969, and E. campechiensis Vázquez-Bader & Gracia, 1991, both only known from the Gulf of Mexico. The new species can be easily separated from its no...

A new species of Dendrochirotida sea cucumber, Parathyone itapuaensis, is described and illustrated herein based on specimens collected from rocky intertidal regions of the northeastern coast of Brazil. The new species is characterized by a suite of morphological characters revealed by light stereomicroscope, SEM and microCT studies of the calcareo...

Despite descending from heavily calcified ancestors, the holothuroid skeleton is fully internal and composed of microscopic ossicles and a ring of plates bound by connective tissue, the calcareous ring. The calcareous ring exhibits a complex and poorly understood morphology; as a result, establishing unambiguous homology statements about its macros...

A new species of the genus Gammarus Fabricius, 1775 is described from Lake Tong Tso, an extreme high-altitude lake in the Qinghai-Tibetan Plateau. Gammarus pontual sp. nov. is considered part of the Gammarus lacustris G.O. Sars, 1863 group, which is characterized by having the inner ramus of uropod 3 longer than half the length of the outer ramus,...

The squat lobsters Munida Leach, 1820 and Agononida Leach, 1820 are part of the most speciose genera in the diverse family Munididae. Despite the considerable diversity (>240 species), the Brazilian waters encompass 18 species so far (17 Munida and 1 Agononida), only 7 (6 and 1, respectively) of which recorded from the coast of São Paulo. The decap...

The Indo-Pacific edible swimming crab Scylla serrata is reported here for the fifth time from the western Atlantic including a failed attempt of introduction to Florida for aquaculture purposes in the years 1960's. The species had been recorded from Brazil in the early 1980's and in 2011 and from the Caribbean coast of Colombia in 2013. The capture...

Pisidia longimana (Risso, 1816) and P. bluteli (Risso, 1816), both described from Nice, France, have been considered each other’s synonyms or have been validated depending on successive taxonomic opinions. The validity of both in respect to P. longicornis (Linnaeus, 1767) has also been contradicted a number of times. The current lack of clarity in...

A new species of freshwater crab, Fredius ibiapaba, is described and illustrated from a mid-altitude forested patch in Ipú (Ibiapaba plateau, Ceará, northeastern Brazil), between 635 to 782 m. The new species can be separated from its congeners by the morphology of its first gonopod: proximal half remarkably swollen, sloping abruptly downwards dist...

A new species of intertidal ghost shrimp, Biffarius botterae, is described from Maranhão and Ceará in northeastern Brazilian coast. Diagnostic features of the new species include: (1) antennular peduncle shorter than antennal peduncle; (2) male major cheliped massive; (3) male pleopod 2 uniramous, vestigial; (4) uropodal endopod widening distally,...

The Trindade and Martin Vaz (TMV) volcanic archipelago is highly isolated, being located some 1200 km off the Brazilian coast and about 4200 km away from the nearest African coast. The only axiidean known from the archipelago is Coralaxius nodulosus (Meinert, 1877), a species extensively reported in the western Atlantic. From 2012 to 2018, 263 SCUB...

Novorostrum decorocrus Osawa, 1998, so far only known from its type locality, Iriomote Island, Ryukyu Islands, southern Japan, is herein recorded from much farther south, Ambon Island, Indonesia. Males and females of N. decorocrus differ from each other in some morphological traits and their morphological differences are also discussed and illustra...

Trindade and Martin Vaz (TMV) is a highly isolated, oceanic volcanic archipelago located approximately 1200 km off the Brazilian coast and about 4200 km away from the nearest African coast. It has been almost 70 years since the first sea star, “Astropecten sp.”, was recorded from Trindade in 1951. In the following years (1955–1971; 2006) six sea st...

Two new species, Psolidium nanoplax and Psolidium lonchostinum, are described from the southeastern Brazilian coast, from 44 and 200–258 meters deep, respectively. This is the first record of the genus Psolidium from Brazil. Psolidium nanoplax sp. nov. superficially resembles its Atlantic and Magellanic congeners, P. disciformis (Théel, 1886), P. d...

The Miocene fiddler crab Uca antiqua Brito, 1972, from the Pirabas Formation (Brazil), has been recurrently claimed to be a valid species and the oldest fossil record of the brachyuran crab family Ocypodidae. However, morphological investigations with the aid of microCT scan images of a large number of topotypic specimens and re-examination of the...

Trindade and Martin Vaz (TMV) is a highly isolated, oceanic volcanic archipelago located some 1200 km off the Brazilian coast and about 4200 km away from the nearest African coast. For almost 100 years Calcinus tibicen (Herbst, 1791) was the only hermit crab species known from TMV. From 2012 to 2018, 263 daytime SCUBA diving and intertidal sampling...

Porcellana paivacarvalhoi Rodrigues da Costa, 1968, described from southeastern Brazil (São Sebastião, São Paulo), is morphologically similar to the eastern Atlantic P. platycheles (Pennant, 1777), and also to the west African P. africana Chace, 1956. The synonymy between P. paivacarvalhoi and P. platycheles was proposed by previous authors without...

Sclerothyone Thandar, 1989, currently restricted to two South African species, is here expanded to include two new species from off coast of Brazil. These new species expand the distribution of the genus to the southwestern Atlantic Ocean. Sclerothyone reichi sp. nov. is characterized by having body wall with multilocular two pillared tables with m...

Eumunida picta Smith, 1883, was considered for over a century an amphi-Atlantic species and the only representative of the genus in the Atlantic Ocean, until being split into three species: E. picta sensu stricto (from the northwestern Atlantic), E. bella de Saint Laurent & MacPherson, 1990 and E. squamifera de Saint Laurent & MacPherson, 1990 (fro...

All previous records of Pachycheles rugimanus A. Milne-Edwards, 1880, from the Brazilian coast are reviewed and prove to represent a new species, P. coelhoi sp. nov. (from Amapá, northern Brazilian coast), and P. ackleianus A. Milne-Edwards, 1880, a species already known from Brazil (from Pará to Rio de Janeiro). The new species is described and il...

The taxonomy of the southeastern Brazilian species of Psolus is reviewed and two new species described. Additionally, P.vitoriaeisredescribedbasedonanewlydesignatedneotypeandsupplementalmaterialfromthetypelocalityandnearby regions. The synonymy of P. marcusi with P. patagonicus is called into question. The calcareous ring is useful for distin- guis...

The eastern Atlantic, Mediterranean, and Black Sea species, Liocarcinus depurator (Linnaeus, 1758), is recorded for the first time from the Western Atlantic (Brazil). This is the second invasive species of Liocarcinus Stimpson, 1871 recorded from the Western Atlantic along with L. navigator (Herbst, 1794). Single and occasional records of invasive...

We re-describe and confirm the validity of Ophiothrix trindadensis Tommasi, 1970 (Echinodermata: Ophiuroidea). This is a native species from Brazil, however it lacked a type series deposited in scientific collections. The recognition of O. trindadensis was made possible using integrative taxonomy applied to many specimens from the type locality (Tr...

Abbreviations and definitions of the 17 morphological characters used for the morphometric analysis. (DOCX)

Four main sides of the vertebrae ossicle of Ophiothrix. Proximal view (pv), distal view (div), dorsal view (dov), ventral view (vv). CS1 MZUSP 1426: (A) pv; (B) div; (C) dov; (D) vv. CS2 MZUSP 1425: (E) pv; (F) div; (G) dov; (H) vv. CS3 ZUEC OPH 2811: (I) pv; (J) div; (K) dov; (L) vv. CS4 ZUEC OPH 2783: (M) pv; (N) div; (O) dov; (P) vv. d: dorsal;...

Genetic distance (%) between and within the CS. Genetic distance between the CSs estimated from the mitochondrial gene fragments 16S (downward triangle) and COI (top triangle). In the gray diagonal line, average genetic distance (%) of both genes within the groups of sequences. AB, Araçá Bay, São Paulo, Brazil; CS, Candidate Species inferred from m...

Analysis of Molecular Variance (AMOVA) for the population structuring scenario given by the groups I and II. Group I is composed of the specimens from Trindade and Martin Vaz Oceanic Archipelago, Saint Peter and Saint Paul Archipelago–which corresponds to Clade A inferred in the phylogenetic analysis. Group II is composed of the specimens from Estu...

Study sites and data collection. Triangles represent the samples that were collected during the present study: Trindade and Martin Vaz Oceanic Archipelago, Araçá Bay, and the Estuarine Complex of Paranaguá. Circles represent the location of samples used in our comparisons: São Pedro and São Paulo Archipelago (molecular data), South Carolina (morpho...

Ophiothrix trindadensis–color patterns in some preserved specimens. (A) ZUEC OPH 2907, dd = 5.8 mm. (B) MZUSP 1661, dd = 5.3 mm. (C) MZUSP 1687, dd = 3,1 mm. (D) MZUSP 1450, dd = 6.1 mm. (E) MZUSP 1686 dd = 4.2 mm. (F) ZUEC OPH 2883, dd = 8.5 mm. Stereomicroscope photos, scale bar equal to 1 mm. (TIF)

Study sites that brittle stars were collected (TMV, AB, ECP) and compared (SPSPA, TX-US, SC-US). AB, Araçá Bay; ECP, Estuarine Complex of Paranaguá; SC-US, South Carolina, United States; SPSPA, São Pedro and São Paulo Islands; TMV, Trindade and Martin Vaz Oceanic Archipelago; TX-US, Texas, United States; USNM, United States National Museum;–absent....

Comparative table of the differences in dorsal and lateral arm plates between the CS. (DOCX)

Illustrations of the 17 morphological characters used for the morphometric analysis. The abbreviations and definitions are described in S2 Table. (TIF)

Arm ossicles of Ophiothrix CSs. dorsal (dap), ventral (vap), and lateral arm plates (lap). CS1 MZUSP 1426: (A) dap; (B) vap; (C,D) lap. CS2 MZUSP 1425: (E) dap; (F) vap; (G, H) lap. CS3 ZUEC OPH 2811: (I) dap; (J) vap; (K,L) lap. CS4 ZUEC OPH 2783: (M) dap; (N) vap; (O, P) lap. d: dorsal; ddi: dorso-distal; di: distal; dp: dorso-proximal; p: proxim...

Phylogenetic relationships inferred from the 16S (left) and COI (right) matrices by Bayesian analysis (MrBayes analysis). Numbers above and below branches represent the support values for BI (posterior probabilities) and MP (bootstrap values in %), respectively. The MP tree was not represented. Branches are identified by individual codes and their...

Cladogram inferred from the Maximum Likelihood of 16S and COI sequences (concatenated). The numbers in nodes represent the support values (bootstrap). Branches are identified by individual codes (S3 Table) and their localities: AB: Araçá Bay, São Paulo, Brazil; ECP: Estuarine Complex of Paranaguá, Paraná, Brazil; EUR: Europe; SPSPA: São Pedro and S...

Species delimitation hypothesis obtained in the maximum likelihood solution of the Bayesian Poisson Tree Processes (bPTP) analysis. Branches in red connect haplotypes included in same species, in blue distinct species. Branches are identified by individual codes (S3 Table) and their localities: AB: Araçá Bay, São Paulo, Brazil; ECP: Estuarine Compl...

Specimens used in the phylogenetic analyses with their locality, museums vouchers, and GenBank accession numbers for DNA sequences. AB, Araçá Bay, Brazil; AM, Australian Museum; ECP, Estuarine Complex of Paranaguá, Brazil; EUR, Europe; FMC, French Mediterranean Coast; IC, individual codes in the present study; NMRJ, National Museum of Rio de Janeir...

Material used in this study. MZUSP = Museum of Zoology of University of São Paulo. ZUEC OPH = Museum of Zoology of the University of Campinas. * = juvenile specimens (less than 4 mm of dd). (XLSX)

Beginning in November 2018, Brazilian legislation regulating access to genetic heritage and associated traditional knowledge will cause a bureaucratic collapse of Biodiversity research in Brazil. Law number 13.123/2015 and Decree 8772/2016 impose severe barriers to basic and applied research, and to international cooperation by introducing mandator...

Paulayellus gustavi, a new sclerodactylid genus and species, is described from the Pacific coast of Panama. The new genus and species is assigned to the subfamily Sclerothyoninae based on a suite of characters, which include the radial and interradial plates of the calcareous ring united at the base only. Paulayellus gen. nov. differs from the othe...

Two new species in the genera Thyone and Havelockia are described and illustrated based upon specimens collected from off the southeastern Brazilian coast. Thyone florianoi sp. nov. is characterized by having two pillared body wall tables with four-holed discs and introvert with multilocular tables. Thyone crassidisca is recorded herein for the fir...

Ypsilothuria bitentaculata bitentaculata (Ludwig, 1893), previously known from several localities in the Pacific Ocean, is recorded herein for the first time from the southwestern Atlantic Ocean based on eight specimens caught off the coast of southeastern Brazil, between 505–511 m deep. Several morphological details are added to the description of...

The genus Scyramathia A. Milne-Edwards, 1880 (type species Amathia carpenteri Norman in Wyville Thomson, 1873) is herein removed from the synonymy of Rochinia A. Milne-Edwards, 1875 (type species R. gracilipes A. Milne-Edwards, 1875) and a new genus, Minyorhyncha, is established for Amathia crassa A. Milne-Edwards, 1879, a species previously placed...

The morphology of the fifth pereiopods was studied under scanning electron microscopy in ten species of porcelain crabs for chaetotaxy and setal diversity, namelly Megalobrachium pacificum, Megalobrachium roseum, Pachycheles grossimanus, Petrolisthes armatus, Petrolisthes tuberculatus, Pisidia brasiliensis, Pisidia longicornis, Polyonyx gibbesi, Po...

The present revision is based on the largest sample of Euryrhynchidae Holthuis, 1950 studied to date, with special reference to Euryrhynchus Miers, 1878. The revision confirms the validity of the 8 currently recognized species of Euryrhynchidae and describes 2 new species related to Euryrhynchus amazoniensis Tiefenbacher, 1978: E. taruman sp. nov....

A new species of spider crab, Collodes tuerkayi n. sp., is described and illustrated from the Western Atlantic (Puerto Rico and northern Brazil). The new species superficially resembles C. inermis A. Milne-Edwards, 1878, in the general appearance of the body, but is distinguished by the details of the carapace, thoracic sternum and antennal ornamen...

The taxonomy of Aegla marginata Bond-Buckup & Buckup, 1994 from three disjunct hydrographic basins is revised using morphological data. Aegla marginata is redescribed from the type-locality (Morretes, Paraná State, Brazil) and a new species, Aegla quilombola n. sp., is described (from Intervales State Park, São Paulo State, Brazil). Both species ar...

A new species of spider crab, Collodes tuerkayi n. sp., is described and illustrated from the Western Atlantic (Puerto Rico and northern Brazil). The new species superficially resembles C. inermis A. Milne-Edwards, 1878, in the general appearance of the body, but is distinguished by the details of the carapace, thoracic sternum and antennal ornamen...

Three species in two genera of porcelain crabs are reported from the remote oceanic archipelago of Trindade and Martin Vaz one of which, Pachycheles meloi, new to science. The new species is morphologically similar to Pachycheles riisei (Stimpson, 1858) from the inner continental shelf between Florida (USA) and São Paulo (Brazil), of which Pachyche...

The remoteness of the Trindade and Martin Vaz young volcanic archipelago (TMV) raises questions about the source of its marine benthic fauna and levels of endemism. Addressing these questions requires a comprehensive knowledge of the taxonomic composition of the marine fauna of the islands. A five-year survey in the shallow marine waters (up to 30...

The question whether taxonomic descriptions naming new animal species without type specimen(s) deposited in collections should be accepted for publication by scientific journals and allowed by the Code has already been discussed in Zootaxa (Dubois & Nemésio 2007; Donegan 2008, 2009; Nemésio 2009a–b; Dubois 2009; Gentile & Snell 2009; Minelli 2009;...

This plot is not part of the published stance but derives from it. The plot shows the number of authors by geographic region (courtesy of Dr. Diego Astua).

The degree of isolation of oceanic islands makes these environments an excellent model for evolutionary studies. Proper knowledge of the species composition of oceanic islands, however, is required to better understand evolutionary processes (e.g. speciation events). A 3-year survey in the shallow waters (up to 30 m) of the Trindade and Martin Vaz...

The taxonomy of the Brazilian aeglid species Aegla paulensis Schmitt, 1942 from two disjunct hydrographic basins is revised using morphological and molecular data. Results show that six disjunctive populations of Aegla paulensis form a species complex. Aegla paulensis sensu stricto is redescribed and Aegla rosanae Campos Jr., 1998 is revalidated. T...

Stenocionops furcatus (Olivier, 1791) and S. coelatus (A. Milne-Edwards, 1878) have been treated either as subspecies or as species in their own right, but never as each other's synonyms. Compared to S. coelatus, S. furcatus has been regarded as having smoother dorsal surface carapace, shorter rostral spines, straighter and less divergent rostrum....

As coleções biológicas são a fonte básica de informações sobre as espécies, servindo a diferentes áreas de estudo sobre a biodiversidade. Coleções biológicas sobre subfósseis são, ainda, raras no Brasil, embora sejam fundamentais para implementação de medidas de conservação e manejo, uma vez que podem servir como base referencial para estudos histó...

A new genus and species of freshwater crab, Melothelphusa apiaka n. gen., n. sp., from Mato Grosso, Central Brazil is described and illustrated. Brasiliothelphusa dardanelosensis Magalhães & Türkay, 2010, is assigned to the new genus Melothelphusa. Therefore, the genus Brasiliothelphusa Magalhães & Türkay, 1986, is restricted to its type species B....

The present study deals with shrimps of the family Alpheidae collected in the shallow waters around the remote Trindade & Martin Vaz Archipelago, situated 1200 km off the coast of Espirito Santo, Brazil. A few additional samples came from dredges on top of the seamounts of the Vitoria-Trindade Seamount Chain. A total of 23 species in eight genera a...

Recently a new species of bombyliid fly, Marleyimyia xylocopae, was described by Marshall & Evenhuis (2015) based on two photographs taken during fieldwork in the Republic of South Africa. This species has no preserved holotype. The paper generated some buzz, especially among dipterists, because in most cases photographs taken in the field provide...

Macrobrachium carcinus é uma espécie nativa com reconhecido potencial para uso em cultivos aquícolas, porém com poucas informações sobre suas estratégias alimentares. O objetivo deste estudo foi descrever e ilustrar em detalhes a morfologia do estômago de M. carcinus e fazer uma breve associação com seu hábito alimentar. O trato digestivo compreend...

A new species of porcelain crab, Megalobrachium lemaitrei n. sp., is described and illustrated from the Pacific coasts of Panama and Colombia. The new species is similar to its northern counterpart M. erosum (Glassell, 1936) in the general eroded appearance of the carapace and chelipeds, but is distinguished by the details of the carapace and cheli...