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1. A new and threatened species of Listrura (Siluriformes: Trichomycteridae), a rare catfish from an Atlantic Forest continental island

Author

Lucas Silva de Medeiros, Laura Modesti Donin, Juliano Ferrer, Sergio Maia Queiroz Lima, and Mário de Pinna

Subjects
Conservation, Insular ichthyofauna, Microcambevinae, Santa Catarina Island, Taxonomy, Zoology, QL1-991
Abstract

Abstract Listrura is a genus of small pencil catfishes of Trichomycteridae that currently comprises 12 valid species in coastal drainages of Southern and Southeastern Brazil, all with fossorial dwelling habitats and eel-like morphology. Here, we describe a new species of Listrura known from only two specimens collected in an interval of 24 years in order to make it taxonomically available for biodiversity inventories and conservation decisions. The new species is morphologically distinguished from its congeners by the combination of features, as pectoral-fin rays counts, number of free vertebrae, number caudal-fin procurrent rays, interopercular odontodes counts and the anterior-most position of dorsal and anal fin. Partial sequences of the mitochondrial gene cox1 were used to infer the phylogenetic relationships and biogeography of the new species and its congeners. The new species is the first freshwater fish endemic to a continental island in the Atlantic Forest Biome, and only the second trichomycterid endemic of an island.

Published
2024
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2. Catálogo Taxonômico da Fauna do Brasil: Setting the baseline knowledge on the animal diversity in Brazil

Author

Walter A. Boeger, Michel P. Valim, Hussam Zaher, José A. Rafael, Rafaela C. Forzza, Alexandre R. Percequillo, Cristiana S. Serejo, André R.S. Garraffoni, Adalberto J. Santos, Adam Slipinski, Adelita M. Linzmeier, Adolfo R. Calor, Adrian A. Garda, Adriano B. Kury, Agatha C.S. Fernandes, Aisur I. Agudo-Padrón, Alberto Akama, Alberto M. da Silva Neto, Alejandro L. Burbano, Aleksandra Menezes, Alessandre Pereira-Colavite, Alexander Anichtchenko, Alexander C. Lees, Alexandra M.R. Bezerra, Alexandre C. Domahovski, Alexandre D. Pimenta, Alexandre L.P. Aleixo, Alexandre P. Marceniuk, Alexandre S. de Paula, Alexandre Somavilla, Alexandre Specht, Alexssandro Camargo, Alfred F. Newton, Aline A.S. da Silva, Aline B. dos Santos, Aline D. Tassi, Allan C. Aragão, Allan P.M. Santos, Alvaro E. Migotto, Amanda C. Mendes, Amanda Cunha, Amazonas Chagas Júnior, Ana A.T. de Sousa, Ana C. Pavan, Ana C.S. Almeida, Ana L.B.G. Peronti, Ana L. Henriques-Oliveira, Ana L. Prudente, Ana L. Tourinho, Ana M.O. Pes, Ana P. Carmignotto, Ana P.G. da Silva Wengrat, Ana P.S. Dornellas, Anamaria Dal Molin, Anderson Puker, André C. Morandini, André da S. Ferreira, André L. Martins, André M. Esteves, André S. Fernandes, André S. Roza, Andreas Köhler, Andressa Paladini, Andrey J. de Andrade, Ângelo P. Pinto, Anna C. de A. Salles, Anne I. Gondim, Antonia C.Z. Amaral, Antonio A.A. Rondón, Antonio Brescovit, Antônio C. Lofego, Antonio C. Marques, Antonio Macedo, Artur Andriolo, Augusto L. Henriques, Augusto L. Ferreira Júnior, Aurino F. de Lima, Ávyla R. de A. Barros, Ayrton do R. Brito, Bárbara L.V. Romera, Beatriz M.C. de Vasconcelos, Benjamin W. Frable, Bernardo F. Santos, Bernardo R. Ferraz, Brunno B. Rosa, Brunno H.L. Sampaio, Bruno C. Bellini, Bruno Clarkson, Bruno G. de Oliveira, Caio C.D. Corrêa, Caleb C. Martins, Camila F. de Castro-Guedes, Camilla Souto, Carla de L. Bicho, Carlo M. Cunha, Carlos A. de M. Barboza, Carlos A.S. de Lucena, Carlos Barreto, Carlos D.C.M. de Santana, Carlos E.Q. Agne, Carlos G.C. Mielke, Carlos H.S. Caetano, Carlos H.W. Flechtmann, Carlos J.E. Lamas, Carlos Rocha, Carolina S. Mascarenhas, Cecilia B. Margaría, Cecilia Waichert, Celina Digiani, Célio F.B. Haddad, Celso O. Azevedo, Cesar J. Benetti, Charles M.D. dos Santos, Charles R. Bartlett, Cibele Bonvicino, Cibele S. Ribeiro-Costa, Cinthya S.G. Santos, Cíntia E.L. Justino, Clarissa Canedo, Claudia C. Bonecker, Cláudia P. Santos, Claudio J.B. de Carvalho, Clayton C. Gonçalves, Cleber Galvão, Cleide Costa, Cléo D.C. de Oliveira, Cristiano F. Schwertner, Cristiano L. Andrade, Cristiano M. Pereira, Cristiano Sampaio, Cristina de O. Dias, Daercio A. de A. Lucena, Daiara Manfio, Dalton de S. Amorim, Dalva L. de Queiroz, Daniara Colpani, Daniel Abbate, Daniel A. Aquino, Daniel Burckhardt, Daniel C. Cavallari, Daniel de C. Schelesky Prado, Daniel L. Praciano, Daniel S. Basílio, Daniela de C. Bená, Daniela G.P. de Toledo, Daniela M. Takiya, Daniell R.R. Fernandes, Danilo C. Ament, Danilo P. Cordeiro, Darliane E. Silva, Darren A. Pollock, David B. Muniz, David I. Gibson, David S. Nogueira, Dayse W.A. Marques, Débora Lucatelli, Deivys M.A. Garcia, Délio Baêta, Denise N.M. Ferreira, Diana Rueda-Ramírez, Diego A. Fachin, Diego de S. Souza, Diego F. Rodrigues, Diego G. de Pádua, Diego N. Barbosa, Diego R. Dolibaina, Diogo C. Amaral, Donald S. Chandler, Douglas H.B. Maccagnan, Edilson Caron, Edrielly Carvalho, Edson A. Adriano, Edson F. de Abreu Júnior, Edson H.L. Pereira, Eduarda F.G. Viegas, Eduardo Carneiro, Eduardo Colley, Eduardo Eizirik, Eduardo F. dos Santos, Eduardo M. Shimbori, Eduardo Suárez-Morales, Eliane P. de Arruda, Elisandra A. Chiquito, Élison F.B. Lima, Elizeu B. de Castro, Elton Orlandin, Elynton A. do Nascimento, Emanuel Razzolini, Emanuel R.R. Gama, Enilma M. de Araujo, Eric Y. Nishiyama, Erich L. Spiessberger, Érika C.L. dos Santos, Eugenia F. Contreras, Eunice A.B. Galati, Evaldo C. de Oliveira Junior, Fabiana Gallardo, Fabio A. Hernandes, Fábio A. Lansac-Tôha, Fabio B. Pitombo, Fabio Di Dario, Fábio L. dos Santos, Fabio Mauro, Fabio O. do Nascimento, Fabio Olmos, Fabio R. Amaral, Fabio Schunck, Fábio S. P. de Godoi, Fabrizio M. Machado, Fausto E. Barbo, Federico A. Agrain, Felipe B. Ribeiro, Felipe F.F. Moreira, Felipe F. Barbosa, Fenanda S. Silva, Fernanda F. Cavalcanti, Fernando C. Straube, Fernando Carbayo, Fernando Carvalho Filho, Fernando C.V. Zanella, Fernando de C. Jacinavicius, Fernando H.A. Farache, Fernando Leivas, Fernando M.S. Dias, Fernando Mantellato, Fernando Z. Vaz-de-Mello, Filipe M. Gudin, Flávio Albuquerque, Flavio B. Molina, Flávio D. Passos, Floyd W. Shockley, Francielly F. Pinheiro, Francisco de A.G. de Mello, Francisco E. de L. Nascimento, Francisco L. Franco, Francisco L. de Oliveira, Francisco T. de V. Melo, Freddy R.B. Quijano, Frederico F. Salles, Gabriel Biffi, Gabriel C. Queiroz, Gabriel L. Bizarro, Gabriela Hrycyna, Gabriela Leviski, Gareth S. Powell, Geane B. dos Santos, Geoffrey E. Morse, George Brown, George M.T. Mattox, Geraldo Zimbrão, Gervásio S. Carvalho, Gil F.G. Miranda, Gilberto J. de Moraes, Gilcélia M. Lourido, Gilmar P. Neves, Gilson R.P. Moreira, Giovanna G. Montingelli, Giovanni N. Maurício, Gláucia Marconato, Guilherme E.L. Lopez, Guilherme L. da Silva, Guilherme Muricy, Guilherme R.R. Brito, Guilherme S.T. Garbino, Gustavo E. Flores, Gustavo Graciolli, Gustavo S. Libardi, Heather C. Proctor, Helcio R. Gil-Santana, Henrique R. Varella, Hermes E. Escalona, Hermes J. Schmitz, Higor D.D. Rodrigues, Hilton de C. Galvão Filho, Hingrid Y.S. Quintino, Hudson A. Pinto, Hugo L. Rainho, Igor C. Miyahira, Igor de S. Gonçalves, Inês X. Martins, Irene A. Cardoso, Ismael B. de Oliveira, Ismael Franz, Itanna O. Fernandes, Ivan F. Golfetti, Ivanklin S. Campos-Filho, Ivo de S. Oliveira, Jacques H.C. Delabie, Jader de Oliveira, Jadila S. Prando, James L. Patton, Jamille de A. Bitencourt, Janaina M. Silva, Jandir C. Santos, Janine O. Arruda, Jefferson S. Valderrama, Jeronymo Dalapicolla, Jéssica P. Oliveira, Jiri Hájek, João P. Morselli, João P. Narita, João P.I. Martin, Jocélia Grazia, Joe McHugh, Jorge J. Cherem, José A.S. Farias Júnior, Jose A.M. Fernandes, José F. Pacheco, José L.O. Birindelli, José M. Rezende, Jose M. Avendaño, José M. Barbanti Duarte, José R. Inácio Ribeiro, José R.M. Mermudes, José R. Pujol-Luz, Josenilson R. dos Santos, Josenir T. Câmara, Joyce A. Teixeira, Joyce R. do Prado, Juan P. Botero, Julia C. Almeida, Julia Kohler, Julia P. Gonçalves, Julia S. Beneti, Julian P. Donahue, Juliana Alvim, Juliana C. Almeida, Juliana L. Segadilha, Juliana M. Wingert, Julianna F. Barbosa, Juliano Ferrer, Juliano F. dos Santos, Kamila M.D. Kuabara, Karine B. Nascimento, Karine Schoeninger, Karla M. Campião, Karla Soares, Kássia Zilch, Kim R. Barão, Larissa Teixeira, Laura D. do N.M. de Sousa, Leandro L. Dumas, Leandro M. Vieira, Leonardo H.G. Azevedo, Leonardo S. Carvalho, Leonardo S. de Souza, Leonardo S.G. Rocha, Leopoldo F.O. Bernardi, Letícia M. Vieira, Liana Johann, Lidianne Salvatierra, Livia de M. Oliveira, Lourdes M.A. El-moor Loureiro, Luana B. Barreto, Luana M. Barros, Lucas Lecci, Lucas M. de Camargos, Lucas R.C. Lima, Lucia M. Almeida, Luciana R. Martins, Luciane Marinoni, Luciano de A. Moura, Luciano Lima, Luciano N. Naka, Lucília S. Miranda, Lucy M. Salik, Luis E.A. Bezerra, Luis F. Silveira, Luiz A. Campos, Luiz A.S. de Castro, Luiz C. Pinho, Luiz F.L. Silveira, Luiz F.M. Iniesta, Luiz F.C. Tencatt, Luiz R.L. Simone, Luiz R. Malabarba, Luiza S. da Cruz, Lukas Sekerka, Lurdiana D. Barros, Luziany Q. Santos, Maciej Skoracki, Maira A. Correia, Manoel A. Uchoa, Manuella F.G. Andrade, Marcel G. Hermes, Marcel S. Miranda, Marcel S. de Araújo, Marcela L. Monné, Marcelo B. Labruna, Marcelo D. de Santis, Marcelo Duarte, Marcelo Knoff, Marcelo Nogueira, Marcelo R. de Britto, Marcelo R.S. de Melo, Marcelo R. de Carvalho, Marcelo T. Tavares, Marcelo V. Kitahara, Marcia C.N. Justo, Marcia J.C. Botelho, Márcia S. Couri, Márcio Borges-Martins, Márcio Felix, Marcio L. de Oliveira, Marco A. Bologna, Marco S. Gottschalk, Marcos D.S. Tavares, Marcos G. Lhano, Marcus Bevilaqua, Marcus T.T. Santos, Marcus V. Domingues, Maria A.M. Sallum, María C. Digiani, Maria C.A. Santarém, Maria C. do Nascimento, María de los A.M. Becerril, Maria E.A. dos Santos, Maria I. da S. dos Passos, Maria L. Felippe-Bauer, Mariana A. Cherman, Mariana Terossi, Marie L.C. Bartz, Marina F. de C. Barbosa, Marina V. Loeb, Mario Cohn-Haft, Mario Cupello, Marlúcia B. Martins, Martin L. Christofersen, Matheus Bento, Matheus dos S. Rocha, Maurício L. Martins, Melissa O. Segura, Melissa Q. Cardenas, Mércia E. Duarte, Michael A. Ivie, Michael M. Mincarone, Michela Borges, Miguel A. Monné, Mirna M. Casagrande, Monica A. Fernandez, Mônica Piovesan, Naércio A. Menezes, Natalia P. Benaim, Natália S. Reategui, Natan C. Pedro, Nathalia H. Pecly, Nelson Ferreira Júnior, Nelson J. da Silva Júnior, Nelson W. Perioto, Neusa Hamada, Nicolas Degallier, Ning L. Chao, Noeli J. Ferla, Olaf H.H. Mielke, Olivia Evangelista, Oscar A. Shibatta, Otto M.P. Oliveira, Pablo C.L. Albornoz, Pablo M. Dellapé, Pablo R. Gonçalves, Paloma H.F. Shimabukuro, Paschoal Grossi, Patrícia E. da S. Rodrigues, Patricia O.V. Lima, Paul Velazco, Paula B. dos Santos, Paula B. Araújo, Paula K.R. Silva, Paula R. Riccardi, Paulo C. de A. Garcia, Paulo G.H. Passos, Paulo H.C. Corgosinho, Paulo Lucinda, Paulo M.S. Costa, Paulo P. Alves, Paulo R. de O. Roth, Paulo R.S. Coelho, Paulo R.M. Duarte, Pedro F. de Carvalho, Pedro Gnaspini, Pedro G.B. Souza-Dias, Pedro M. Linardi, Pedro R. Bartholomay, Peterson R. Demite, Petr Bulirsch, Piter K. Boll, Rachel M.M. Pereira, Rafael A.P.F. Silva, Rafael B. de Moura, Rafael Boldrini, Rafaela A. da Silva, Rafaela L. Falaschi, Ralf T.S. Cordeiro, Ramon J.C.L. Mello, Randal A. Singer, Ranyse B. Querino, Raphael A. Heleodoro, Raphael de C. Castilho, Reginaldo Constantino, Reinaldo C. Guedes, Renan Carrenho, Renata S. Gomes, Renato Gregorin, Renato J.P. Machado, Renato S. Bérnils, Renato S. Capellari, Ricardo B. Silva, Ricardo Kawada, Ricardo M. Dias, Ricardo Siewert, Ricaro Brugnera, Richard A.B. Leschen, Robert Constantin, Robert Robbins, Roberta R. Pinto, Roberto E. dos Reis, Robson T. da C. Ramos, Rodney R. Cavichioli, Rodolfo C. de Barros, Rodrigo A. Caires, Rodrigo B. Salvador, Rodrigo C. Marques, Rodrigo C. Araújo, Rodrigo de O. Araujo, Rodrigo de V.P. Dios, Rodrigo Johnsson, Rodrigo M. Feitosa, Roger W. Hutchings, Rogéria I.R. Lara, Rogério V. Rossi, Roland Gerstmeier, Ronald Ochoa, Rosa S.G. Hutchings, Rosaly Ale-Rocha, Rosana M. da Rocha, Rosana Tidon, Rosangela Brito, Roseli Pellens, Sabrina R. dos Santos, Sandra D. dos Santos, Sandra V. Paiva, Sandro Santos, Sarah S. de Oliveira, Sávio C. Costa, Scott L. Gardner, Sebastián A. Muñoz Leal, Sergio Aloquio, Sergio L.C. Bonecker, Sergio L. de S. Bueno, Sérgio M. de Almeida, Sérgio N. Stampar, Sérgio R. Andena, Sergio R. Posso, Sheila P. Lima, Sian de S. Gadelha, Silvana C. Thiengo, Simone C. Cohen, Simone N. Brandão, Simone P. Rosa, Síria L.B. Ribeiro, Sócrates D. Letana, Sonia B. dos Santos, Sonia C.S. Andrade, Stephane Dávila, Stéphanie Vaz, Stewart B. Peck, Susete W. Christo, Suzan B.Z. Cunha, Suzete R. Gomes, Tácio Duarte, Taís Madeira-Ott, Taísa Marques, Talita Roell, Tarcilla C. de Lima, Tatiana A. Sepulveda, Tatiana F. Maria, Tatiana P. Ruschel, Thaiana Rodrigues, Thais A. Marinho, Thaís M. de Almeida, Thaís P. Miranda, Thales R.O. Freitas, Thalles P.L. Pereira, Thamara Zacca, Thaynara L. Pacheco, Thiago F. Martins, Thiago M. Alvarenga, Thiago R. de Carvalho, Thiago T.S. Polizei, Thomas C. McElrath, Thomas Henry, Tiago G. Pikart, Tiago J. Porto, Tiago K. Krolow, Tiago P. Carvalho, Tito M. da C. Lotufo, Ulisses Caramaschi, Ulisses dos S. Pinheiro, Ulyses F.J. Pardiñas, Valéria C. Maia, Valeria Tavares, Valmir A. Costa, Vanessa S. do Amaral, Vera C. Silva, Vera R. dos S. Wolff, Verônica Slobodian, Vinícius B. da Silva, Vinicius C. Espíndola, Vinicius da Costa-Silva, Vinicius de A. Bertaco, Vinícius Padula, Vinicius S. Ferreira, Vitor C.P. da Silva, Vítor de Q. Piacentini, Vivian E. Sandoval-Gómez, Vivian Trevine, Viviane R. Sousa, Vivianne B. de Sant’Anna, Wayne N. Mathis, Wesley de O. Souza, Wesley D. Colombo, Wioletta Tomaszewska, Wolmar B. Wosiacki, Ximena M.C. Ovando, and Yuri L.R. Leite

Subjects
Biodiversity, knowledge management, taxonomy, web services, zoology, Zoology, QL1-991
Abstract

ABSTRACT 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 classifications. In this context, the Brazilian megadiverse fauna is no exception, and the Catálogo Taxonômico da Fauna do Brasil (CTFB) (http://fauna.jbrj.gov.br/), made public in 2015, represents a database on biodiversity anchored on a list of valid and expertly recognized scientific names of animals in Brazil. The CTFB is updated in near real time by a team of more than 800 specialists. By January 1, 2024, the CTFB compiled 133,691 nominal species, with 125,138 that were considered valid. Most of the valid species were arthropods (82.3%, with more than 102,000 species) and chordates (7.69%, with over 11,000 species). These taxa were followed by a cluster composed of Mollusca (3,567 species), Platyhelminthes (2,292 species), Annelida (1,833 species), and Nematoda (1,447 species). All remaining groups had less than 1,000 species reported in Brazil, with Cnidaria (831 species), Porifera (628 species), Rotifera (606 species), and Bryozoa (520 species) representing those with more than 500 species. Analysis of the CTFB database can facilitate and direct efforts towards the discovery of new species in Brazil, but it is also fundamental in providing the best available list of valid nominal species to users, including those in science, health, conservation efforts, and any initiative involving animals. The importance of the CTFB is evidenced by the elevated number of citations in the scientific literature in diverse areas of biology, law, anthropology, education, forensic science, and veterinary science, among others.

Published
2024
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3. Systematic revision of the Neotropical catfish genus Scleronema (Siluriformes: Trichomycteridae), with descriptions of six new species from Pampa grasslands

Author

Juliano Ferrer and Luiz R. Malabarba

Subjects
Biodiversity, Identification key, Taxonomy, Trichomycterinae, Uruguayan savanna ecoregion, Zoology, QL1-991
Abstract

ABSTRACT The Neotropical genus Scleronema is revised based on the re-examination of the type specimens and 1,713 newly collected specimens. Scleronema is diagnosed from other trichomycterids by the following unambiguous derived characters: fleshy flap at the base of the maxillary barbell; skin flap in the posterior margin of the opercle; articulation between the autopalatine and the vomer ventrally located, with the medial margins of the autopalatines very close to each other; and autopalatine with an interrupted or not interrupted ossified arch-shaped process on its dorsal surface forming a canal. Scleronema minutum and S. operculatum are redescribed, S. angustirostre is considered a junior synonym of S. minutum, and six new species are described. A lectotype is designated for Trichomycterus minutus. The type localities of S. angustirostre, S. minutum, and S. operculatum are reviewed in order to correct erroneous information cited in articles and catalogs subsequent to the original descriptions. Species of Scleronema are geographically distributed in the La Plata basin and Atlantic coastal drainages from Southern Brazil, Southern Paraguay, Northeastern Argentina and Uruguay. They inhabit rivers or streams with sand- or gravel-bottoms across the Pampa grasslands. We provide evidences to recognize two putative monophyletic units within the genus, namely the S. minutum species group and the S. operculatum species group, and discuss the distribution patterns of their species.

Published
2020
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4. A new species of Ituglanis (Siluriformes: Trichomycteridae) from the rio Uruguai basin, southern Brazil

Author

Juliano Ferrer and Laura M. Donin

Subjects
0106 biological sciences, South Brazilian Grasslands, Biome, 010607 zoology, Zoology, Aquatic Science, Structural basin, Genetype, 010603 evolutionary biology, 01 natural sciences, lcsh:Zoology, lcsh:QL1-991, Ecology, Evolution, Behavior and Systematics, Gene-tipo, Taxonomy, biology, Bioma Pampa, Taxonomia, biology.organism_classification, Ituglanis, Pampa Biome, Rio Ibicuí, Animal Science and Zoology, Taxonomy (biology), Trichomycteridae, Campos Sulinos
Abstract

A new species of Ituglanis associated to the grasslands of the Pampa biome is described from the rio Uruguai basin, southern Brazil. The new species is distinguished from its congeners by the low number of ribs and by a unique color pattern composed of an outer layer with scattered round black blotches equivalent in size to the eye circumference over a reddish brown background on the lateral surface of the body. We provide the genetic sequences of the mitochondrial gene Cytochrome c Oxydase subunit I (COI) for three of the paratypes and discuss aspects about the recent discovery of the new species. RESUMO Uma nova espécie de Ituglanis, associada aos campos do bioma Pampa, é descrita para a bacia do rio Uruguai no sul do Brasil. A nova espécie distingue-se de todos seus congêneres pelo pequeno número de costelas e por um padrão de coloração único que consiste de manchas pretas arredondadas de tamanho equivalente à circunferência do olho sobre um fundo marrom avermelhado na superfície lateral do corpo. Sequências genéticas do gene mitocondrial Citocromo Oxidase subunidade I (COI) para três dos parátipos são fornecidas, e aspectos sobre a recente descoberta da nova espécie são discutidos.

Published
2017

5. Review of theiOdontesthes/iiperugiae/ispecies group from Río de La Plata drainage, with the description of a new species (Atherinomorpha: Atherinopsidae)

Author

Juliana M. Wingert, Juliano Ferrer, and Luiz Roberto Malabarba

Subjects
0106 biological sciences, Atheriniformes, Biodiversity, Argentina, 010603 evolutionary biology, 01 natural sciences, Animalia, Animals, Chordata, Ecology, Evolution, Behavior and Systematics, Taxonomy, Actinopterygii, Osteology, biology, Ecology, 010604 marine biology & hydrobiology, Fishes, biology.organism_classification, Type species, Taxon, Atherinopsidae, Uruguay, Animal Science and Zoology, Taxonomy (biology), Odontesthes, Brazil
Abstract

Specimens presently identified as belonging to Odontesthes perugiae species group from rio Parana, rio Uruguay and rio Negro in Argentina, Brazil and Uruguay are revised. Two species are recognized: Odontesthes perugiae , type species of the genus with Odontesthes orientalis as a junior synonym, and a new species described herein. Odontesthes perugiae is redescribed and its distribution restricted to the lower rio Parana, lower rio Uruguay and rio Negro basins. The new species is endemic from the upper rio Uruguay above Salto do Yucuma (Brazil) or Saltos del Mocona (Argentina) falls. Both species share with the remaining taxa included in the O. perugiae species-group ( O. bicudo , O. ledae , O. mirinensis , and O. piquava ) the possession of teeth of the outer row on dentary and premaxilla shorter than those in the inner row, being distinguished from them by the number of gill rakers, body measurements and some osteological characters.

Published
2017

6. Inventory of the freshwater fishes from a densely collected area in South America — a case study of the current knowledge of Neotropical fish diversity

Author

Juliano Ferrer, Fernando R. Carvalho, Luiz Roberto Malabarba, and Vinicius A. Bertaco

Subjects
0106 biological sciences, Endangered species, Biology, History, 21st Century, 010603 evolutionary biology, 01 natural sciences, Species description, Critically endangered, Rivers, Animals, IUCN Red List, Ecology, Evolution, Behavior and Systematics, Taxonomy, Ecology, 010604 marine biology & hydrobiology, Endangered Species, Fishes, Species diversity, History, 19th Century, Biodiversity, History, 20th Century, Threatened species, Neotropical fish, Animal Science and Zoology, Species richness, Zoology, Brazil
Abstract

We herein analyse the history of the description of the freshwater fish fauna from three drainages in one of the most densely collected areas of Brazil, and possibly of South America, the Rio Grande do Sul State, southern Brazil. An updated inventory of the freshwater fish species from rio Uruguay (partial) in Brazil, Laguna dos Patos (complete) and rio Tramandaí basins (complete) is presented. We found the number of new species described in these drainages increased nearly 56% since 1981, reaching a total of 422 species, but even now 10% of this number still corresponds to undescribed species. This rate of species description suggests that previous estimates of the Neotropical fish fauna are low, and we predict a final number of Neotropical fishes larger than the largest prediction estimate (8,000 species), after other regions of South and Central Americas become densely sampled. We discuss and attempt to demonstrate that species diversity knowledge is historically and strictly related to collecting efforts. We also demonstrate that the ecoregions in eastern South America with the highest density of species per area correspond to the areas more densely sampled in collections, and this may represent a bias in such kinds of analyses. This uneven sampling in Brazilian regions is apparently associated with the uneven distribution of Zoological research centers in different regions of the country. Small-sized species represents an important source of new species, along with little explored regions or little explored habitats, sometimes associated with restricted range species, and species complexes that need revisionary work. In contrast to other Neotropical regions, Atheriniformes are relatively diverse, sharing the fifth place in species richness with Gymnotiformes, and there is a remarkably high number of species of Rivulidae. Eight species are endemic to the rio Tramandaí drainage, 68 to the Laguna dos Patos system, and 78 to the rio Uruguay drainage. Almost 10% of the freshwater fish species are "Critically Endangered", "Endangered" or "Vulnerable" according to the IUCN criteria, with Rivulidae as the family with the largest number of threatened species.

Published
2016

7. Taxonomic review of the genus Trichomycterus Valenciennes (Siluriformes: Trichomycteridae) from the laguna dos Patos system, Southern Brazil

Author

Juliano Ferrer and Luiz Roberto Malabarba

Subjects
Trichomycterus, Aquatic Science, Structural basin, Restricted range, Genus, lcsh:Zoology, Tributary, Animalia, lcsh:QL1-991, Rio Jacuí basin, Chordata, Ecology, Evolution, Behavior and Systematics, Taxonomy, geography, geography.geographical_feature_category, Actinopterygii, Trichomycterus tropeiro, biology, Ecology, Trichomycteridae, Biodiversity, biology.organism_classification, Neotropical, Trichomycterinae, Taxon, Animal Science and Zoology, Taxonomic key, Siluriformes, Endemism
Abstract

The species of the genus Trichomycterus inhabiting the laguna dos Patos system are reviewed and five species are recognized. Trichomycterus tropeiro Ferrer & Malabarba has a restricted range and is endemic to the uppermost portion of the rio das Antas. Trichomycterus balios, n. sp., is distributed in the upper portion of the rio das Antas and rio Caí basins. Trichomycterus diatropoporos, n. sp., is endemic to the rio da Prata basin, a tributary of the rio das Antas. Trichomycterus poikilos, n. sp., is widely distributed in the upper portion of the rio Jacuí basin and tributaries of the rio Taquari-Antas. Trichomycterus brachykechenos, n. sp., is endemic to the upper portion of the rio dos Sinos. The new species are distinguishable from most congeners, except for T. davisi, T. mboycy, T. naipi, T. payaya, T. papilliferus, T. perkos, T. plumbeus, and T. tropeiro by the lower number of pectoral-fin rays (I+5-6) and by the first pectoral-fin ray not prolonged as a filament. Other characters distinguish the new taxa from these eight species. The distribution of the genus in the laguna dos Patos system is discussed and a taxonomic key is provided. O gênero Trichomycterus é revisado no sistema da laguna dos Patos e cinco espécies são reconhecidas. Trichomycterus tropeiro Ferrer & Malabarba tem distribuição restrita, ocorrendo somente na porção mais superior do rio das Antas. Trichomycterus balios, sp. n., distribui-se na porção superior das bacias dos rios das Antas e Caí. Trichomycterus diatropoporos, sp. n., é endêmica da bacia do rio da Prata, tributário do rio das Antas. Trichomycterus poikilos, sp. n., é amplamente distribuída nos cursos superiores da bacia do rio Jacuí e tributários dos rios Taquari-Antas. Trichomycterus brachykechenos, sp. n., é endêmica do curso superior do rio dos Sinos. As espécies novas distinguem-se de grande parte de seus congêneres pelo baixo número de raios na nadadeira peitoral (I+5-6) e o primeiro raio da nadadeira peitoral não prolongado como filamento, exceto de T. davisi, T. mboycy, T. naipi, T. papilliferus, T. payaya, T. perkos, T. plumbeus e T. tropeiro, distinguindo-se destas por outros caracteres. A distribuição do gênero no sistema da laguna dos Patos é discutida e uma chave taxonômica é fornecida

Published
2013

8. Living in the waterfalls: A new species of Trichomycterus (Siluriformes: Trichomycteridae) from Tabay stream, Misiones, Argentina

Author

Gastón Aguilera, Mauricio Fabián Benitez, Juliano Ferrer, Guillermo Enrique Teran, Juan Marcos Mirande, and Felipe Alonso

Subjects
0106 biological sciences, Vertebrae, lcsh:Medicine, Transportation, Fresh Water, PARANÁ RIVER BASIN, 01 natural sciences, purl.org/becyt/ford/1 [https], Monophyly, Genus, Parana river, Medicine and Health Sciences, lcsh:Science, Musculoskeletal System, Catfishes, Data Management, Skin, Multidisciplinary, biology, Pigmentation, Integumentary system, New Species Reports, CAUDAL PROCURRENTS RAYS, Transportation Infrastructure, Engineering and Technology, Anatomy, Integumentary System, CIENCIAS NATURALES Y EXACTAS, Research Article, Computer and Information Sciences, Imaging Techniques, Trichomycterus, Otras Ciencias Biológicas, Argentina, 010607 zoology, Zoology, Research and Analysis Methods, Civil Engineering, 010603 evolutionary biology, Ciencias Biológicas, Ocular System, Animals, purl.org/becyt/ford/1.6 [https], Taxonomy, Lips, Mouth, Morphometry, lcsh:R, Biology and Life Sciences, biology.organism_classification, TRICHOMYCTERUS STAWIARSKI GROUP, Spine, Spine (zoology), Taxon, Face, Alcohols, Canals, Eyes, lcsh:Q, Head, Digestive System, Animal Distribution, Trichomycteridae, BRANCHISOTEGAL RAYS
Abstract

A new species assigned to the genus Trichomycterus from the area of the waterfalls of Tabay stream, Paraná River basin, Misiones, Argentina, is described. Trichomycterus ytororo sp. nov. is distinguished from all other species in the genus by the presence of 31?35 dorsal procurrent caudal-fin rays and the combination of some external characters such as: coloration, number of pectoral?fin rays and pores of the laterosensory canals. The new taxon belongs to a presumably monophyletic group of species composed of T. crassicaudatus, T. igobi, and T. stawiarski based on the presence of 24 or more thickly ossified and rigid procurrent caudal-fin rays with a slender distal tip extending along the tips of at least ten neural spines. Fil: Teran, Guillermo Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico - Tucumán. Unidad Ejecutora Lillo. San Miguel de Tucumán; Argentina Fil: Ferrer, Juliano. Universidade Federal do Rio Grande do Sul; Brasil Fil: Benitez, Mauricio Fabián. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Posadas | Universidad Nacional de Misiones. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Posadas; Argentina Fil: Alonso, Felipe. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Bio y Geociencias del NOA. Universidad Nacional de Salta. Facultad de Ciencias Naturales. Museo de Ciencias Naturales. Instituto de Bio y Geociencias del NOA; Argentina Fil: Aguilera, Gaston. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico - Tucumán. Unidad Ejecutora Lillo. San Miguel de Tucumán; Argentina Fil: Mirande, Juan Marcos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico - Tucumán. Unidad Ejecutora Lillo. San Miguel de Tucumán; Argentina

Published
2017

9. A new Trichomycterus lacking pelvic fins and pelvic girdle with a very restricted range in Southern Brazil (Siluriformes: Trichomycteridae)

Author

Juliano Ferrer and Luiz Roberto Malabarba

Subjects
Pelvic girdle, biology, Actinopterygii, Trichomycterus, Trichomycteridae, Zoology, Biodiversity, biology.organism_classification, Restricted range, Genus, %22">Fish , Animalia, Animal Science and Zoology, Endemism, Chordata, Ecology, Evolution, Behavior and Systematics, Siluriformes, Taxonomy
Abstract

Trichomycterus tropeiro, new species, is described from the headwaters of the rio das Antas, laguna dos Patos system, Southern Brazil. Trichomycterus tropeiro is distinguishable from other species of the genus by the absence of pelvic fins and pelvic girdle, except from Trichomycterus candidus and Trichomycterus catamarcensis. It differs from these two species in several counts and measurements. The apparent endemism of the species is discussed.

Published
2011
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10. Austrolebias paucisquama (Cyprinodontiformes: Rivulidae), a new species of annual killifish from southern Brazil

Author

Luiz Roberto Malabarba, Wilson J. E. M. Costa, and Juliano Ferrer

Subjects
Vacacaí, Rio (RS), Dorsum, genetic structures, Zoology, Aquatic Science, Rivulidae, Endangered species, Cyprinodontiformes, Systematics, lcsh:Zoology, Austrolebias alexandri species-group, Animalia, lcsh:QL1-991, Killifish, Chordata, Ecology, Evolution, Behavior and Systematics, Taxonomy, biology, Actinopterygii, Ecology, Fish fin, Austrolebias paucisquama, Biodiversity, biology.organism_classification, Ictiologia, Peixe [Taxonomia animal], Animal Science and Zoology, Austrolebias alexandri, Austrolebias, Black spot
Abstract

Austrolebias paucisquama, uma nova espécie de peixe anual é descrita da bacia do rio Vacacaí, tributário do rio Jacuí, Rio Grande do Sul, Brasil. A nova espécie pertence ao grupo Austrolebias alexandri, que apresenta duas apomorfias, pontos azuis claros e nadadeiras peitorais cinza escuro nos machos. Distingue-se das outras espécies do grupo pelo reduzido número de escamas ao redor do pedúnculo caudal (12) e pelo menor número de raios na nadadeira dorsal dos machos (17-21). A ausência de órgãos de contato na superfície interior das nadadeiras peitorais nos machos e o padrão de colorido das fêmeas – flancos marrom claro com variável número de pontos pretos relativamente alongados distribuídos principalmente na porção posterior – distinguem A. paucisquama das outras espécies do gênero. Austrolebias paucisquama is described from the rio Vacacaí drainage, a tributary to the rio Jacuí, Rio Grande do Sul, Brazil. The new species belongs to the Austrolebias alexandri species-group, by sharing the apomorphic bright blue iridescence and dark gray pectoral fins in males. It is distinguished from other species of this group by having fewer scales around caudal peduncle (12) and fewer dorsal-fin rays in males (17-21). The lack of contact organs on the inner surface of the pectoral fin in males and the color pattern of females – ground color light brownish, sides of body with a variable number of relatively large dark black spots distributed mostly on posterior portion of body – distinguish A. paucisquama from all other species of the genus.

Published
2008

11. A new species of the catfish genus Trichomycterus from the La Plata River basin, southern Brazil, with comments on its putative phylogenetic position (Siluriformes: Trichomycteridae)

Author

Murilo Carvalho, Aléssio Datovo, and Juliano Ferrer

Subjects
Loricarioidea, Actinopterygii, Phylogenetic tree, biology, Ecology, Trichomycterus, Peduncle (anatomy), Trichomycteridae, Zoology, Biodiversity, biology.organism_classification, Genus, Animalia, Juvenile, Animal Science and Zoology, Chordata, Siluriformes, Ecology, Evolution, Behavior and Systematics, Taxonomy, Catfish
Abstract

The genus Trichomycterus is a highly diverse group of Neotropical catfishes that encompass almost 60% of all the cur-rently recognized species of the Trichomycteridae. A new species of this genus, T. perkos, is herein described from tribu-taries of the Paranapanema and Uruguai River basins, southern Brazil. The new species exhibits a remarkable ontogeneticchange in its pigmentation, having a unique color pattern when adult. The adult pigmentation consists of three wide darkbrown stripes, located in an inner skin layer of trunk and caudal peduncle, combined with a superficial light brown freck-led pattern on the dorsum and caudal peduncle. Small, presumably juvenile specimens lack the superficial freckles butalready have the dark stripes, thus resembling the color pattern of a few other congeners. Nevertheless, several unequiv-ocal morphological features distinguish both juveniles and adults of T. perkos from these congeners. In spite of the diffi-culties in estimating phylogenetic relationships within Trichomycterus, the new species is tentatively proposed as being the sister-taxon of a small group of species composed by T. crassicaudatus, T. igobi, and T. stawiarski.

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