A New Species of the Neotropical Catfish Genus Trichomycterus (Siluriformes: Trichomycteridae) Representing a New Body Shape for the Family

Wosiacki, Wolmar Benjamin; Pinna, Mário de

doi:10.1643/ci-06-237

Cited by 24 publications

(31 citation statements)

References 7 publications

(6 reference statements)

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“…obs.). A survey on the presence of this character in Trichomycterus igobi and T. crassicaudatus, both recently described from the Rio Iguaçu basin and though to be closely allied to T. stawiarski (Wosiacki & de Pinna, 2008a, 2008b, would be useful to determine whether all these four species form a monophyletic group.…”

Section: Monophyletic Groups Within the Trichomycterinaementioning

confidence: 99%

Dorsolateral head muscles of the catfish families Nematogenyidae and Trichomycteridae (Siluriformes: Loricarioidei): comparative anatomy and phylogenetic analysis

2010

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The skeletal muscles of the dorsolateral region of the head of the Nematogenyidae and representatives of the all major clades of the Trichomycteridae are described and illustrated. A hypothesis on the phylogenetic relationships among these taxa exclusively based on the surveyed musculature is presented. The single most parsimonious cladogram obtained from the phylogenetic analysis of the 36 myological characters gathered and 35 terminal-taxa mostly agrees with the previous hypotheses of trichomycterid intrarelationships. The Copionodontinae and Trichogeninae form a monophyletic lineage that is the sistergroup to all remaining trichomycterids. The monophyly of the clades formed by Glanapteryginae plus Sarcoglanidinae; Stegophilinae plus Tridentinae plus Vandelliinae; and the assemblage comprising all of these five subfamilies (TSVSG clade) is corroborated. Two of our findings are, however, discordant with the previous prevailing hypotheses: the sister-group relationship among Tridentinae and Stegophilinae and the monophyly of the Trichomycterinae lato sensu, i.e., including the genera Scleronema and Ituglanis. In addition, the previously proposed osteological synapomorphies supporting the close affinities of Scleronema and Ituglanis with the TSVSG clade were revised, revealing that they are either invalid or ambiguous. Most of the synapomorphies herein proposed are homoplasy-free, with some of them corroborating the monophyly of weakly-supported groups, such as Stegophilinae.Os músculos esqueléticos da região dorsolateral da cabeça de Nematogenyidae e de representantes de todos os maiores clados de Trichomycteridae são descritos e ilustrados. Uma hipótese das relações filogenéticas entre estes táxons, baseada exclusivamente na musculatura estudada, é apresentada. O único cladograma mais parcimonioso obtido da análise filogenética dos 36 caracteres miológicos levantados e 35 táxons-terminais concorda com a maior parte das hipóteses anteriores de relações entre os tricomicterídeos. Copionodontinae e Trichogeninae formam uma linhagem monofilética que é grupo-irmã de todos os demais tricomicterídeos. O monofiletismo dos clados formados por Glanapteryginae mais Sarcoglanidinae; Stegophilinae mais Tridentinae mais Vandelliinae; e do agrupamento incluindo estas cinco subfamílias (clado TSVSG) é corroborado. Duas de nossas descobertas são, entretanto, discordantes com relação às hipóteses anteriores mais aceitas: a relação de grupo-irmão entre Tridentinae e Stegophilinae e o monofiletismo de Trichomycterinae lato sensu, i.e., incluindo os gêneros Scleronema e Ituglanis. Além disso, as sinapomorfias osteológicas previamente propostas suportando as relações de afinidade de Scleronema e Ituglanis com o clado TSVSG foram revisadas, revelando serem inválidas ou ambíguas. A maior parte das sinapomorfias aqui propostas são livres de homoplasias, com algumas delas corroborando o monofiletismo de grupos fracamente suportados, tais como o da subfamília Stegophilinae.

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Section: Monophyletic Groups Within the Trichomycterinaementioning

confidence: 99%

Dorsolateral head muscles of the catfish families Nematogenyidae and Trichomycteridae (Siluriformes: Loricarioidei): comparative anatomy and phylogenetic analysis

2010

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“…The Trichomycterinae is currently composed by Bullockia, Eremophilus, Hatcheria, Ituglanis, Rhizosomichthys, Scleronema, Silvinichthys, and Trichomycterus (Arratia, 1990;Wosiacki & de Pinna, 2008b). Within this subfamily, T. payaya lacks the synapomorphies for Bullockia, Eremophilus, Hatcheria, Rhizosomichthys, and Scleronema (Arratia, 1990) and Silvinichthys (Arratia, 1998;Fernandez & de Pinna, 2005).…”

Section: Discussionmentioning

confidence: 99%

Trichomycterus payaya, new catfish (Siluriformes: Trichomycteridae) from headwaters of rio Itapicuru, Bahia, Brazil

2011

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1Trichomycterus payaya, new species, is described from tributaries to the upper rio Itapicuru basin, northern Bahia State, Brazil. The new species is distinguished from congeners by having the head rounded anteriorly in dorsal view and slightly depressed in lateral view, supraorbital pores s6 paired, opening laterally on the supraorbital sensory branch, not emerging from an epiphyseal branch, lateral process of the urohyal distally sharp and with pointed tip, interopercular patch of odontodes longer than deep, with 21-26 odontodes, small number of pleural ribs (5-6 ribs), and dorsal fin in a posterior position. This is the first record of a Trichomycterus from the semiarid region of northeastern Brazil.Trichomycterus payaya, espécie nova, é descrita de tributários do alto rio Itapicuru, norte do Estado da Bahia, Brasil. A espécie nova distingue-se dos congêneres por ter cabeça arredondada anteriormente em vista dorsal e ligeiramente deprimida em vista lateral, poros supraorbitais s6 pares, abrindo-se lateralmente no ramo sensorial supraorbital, não emergindo a partir de um ramo epifiseal, processo lateral do urohial afilado distalmente e com extremidades pontiagudas, placa de odontódeos interoperculares mais longa que larga, com 21-26 odontódeos, baixo número de costelas pleurais (5-6 costelas) e nadadeira dorsal em posição posterior. Este éo primeiro registro de um Trichomycterus para o semi-árido do nordeste do Brasil.

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“…Among the described species of Trichomycterus from southern and southeastern Brazil, an emarginated caudal fin occurs only in T. florensis, T. paquequerensis (MirandaRibeiro, 1943) and in juveniles of T. crassicaudatus (Wosiacki & de Pinna, 2008b). However, T. caipora can be distinguished from T. florensis and T. paquequerensis by having a color pattern composed of four irregular longitudinal rows of rounded blotches on trunk (vs. transversal dark bars and homogeneous colour pattern, respectively).…”

Section: Discussionmentioning

confidence: 99%

“…However, T. caipora can be distinguished from T. florensis and T. paquequerensis by having a color pattern composed of four irregular longitudinal rows of rounded blotches on trunk (vs. transversal dark bars and homogeneous colour pattern, respectively). Trichomycterus caipora and all other species of Trichomycterus could be easily distinguished from T. crassicaudatus by the latter species having a forked caudal fin in adults and the deepest caudal peduncle within the Trichomycteridae (Wosiacki & de Pinna, 2008b).…”

Section: Discussionmentioning

confidence: 99%

A new species of Trichomycterus (Siluriformes: Trichomycteridae) from lagoa Feia drainage, southeastern Brazil

Lima

Lazzarotto²,

Costa

2008

Neotrop. ichthyol.

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Trichomycterus caipora, new species, is described from rio Macabu basin, lagoa Feia drainage, serra de Macaé, southeastern Brazil. The new species is distinguished from its congeners from southern and southeastern Brazil by the combination of: the presence of nine pectoral-fin rays, caudal fin emarginated and high number of opercular and interorpecular odontodes. Ecological notes are presented and putative phylogenetic relationships and characters shared with congeners are discussed.Trichomycterus caipora, espécie nova, é descrita para a bacia do rio Macabu, drenagem da lagoa Feia, serra de Macaé, sudeste do Brasil. A nova espécie distingue-se dos demais Trichomycterus do sul e sudeste do Brasil pela combinação: da presença de nove raios na nadadeira peitoral, nadadeira caudal emarginada e elevado número de odontódeos operculares e interoperculares. Dados ecológicos são apresentados e as supostas relações filogenéticas e caracteres compartilhados com espécies do gênero são discutidos.

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A New Species of the Neotropical Catfish Genus Trichomycterus (Siluriformes: Trichomycteridae) Representing a New Body Shape for the Family

Cited by 24 publications

References 7 publications

Dorsolateral head muscles of the catfish families Nematogenyidae and Trichomycteridae (Siluriformes: Loricarioidei): comparative anatomy and phylogenetic analysis

Dorsolateral head muscles of the catfish families Nematogenyidae and Trichomycteridae (Siluriformes: Loricarioidei): comparative anatomy and phylogenetic analysis

Trichomycterus payaya, new catfish (Siluriformes: Trichomycteridae) from headwaters of rio Itapicuru, Bahia, Brazil

A new species of Trichomycterus (Siluriformes: Trichomycteridae) from lagoa Feia drainage, southeastern Brazil

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