Systematics of the Neotropical Catfish Genera Nemuroglanis Eigenmann and Eigenmann 1889, Imparales Schultz 1944, and Medemichthys Dahl 1961 (Siluriformes: Heptapteridae)

Bockmann, Flávio Alicino; Ferraris, Carl J.

doi:10.1643/ci-04-019r1

Cited by 33 publications

(65 citation statements)

References 4 publications

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“…The lateral line of the trunk of R. microcephala and R. moreirai is long but it is formed by patches of pores, gradually more spaced posteriorly, ending at about below the posterior half of adipose fin. A similar condition is present in Acentronichthys (Bockmann, 1998;Bockmann & Ferraris, 2005). The lateral line of R. krugi is much shorter than that of its congeners (Trajano & Bockmann, 2000), extending to below dorsal-fin base (Fig.…”

Section: Phylogenetics Relationships Of Rhamdiopsis Krugisupporting

confidence: 52%

“…3a-b). Among heptapterids, this plesiomorphy has been illustrated for Nemuroglanis pauciradiatus Ferraris (Bockmann & Ferraris, 2005;Bockmann & Castro, 2008) and Rhamdella cainguae Bockmann & Miquelarena (Bockmann & Miquelarena, 2008). The derived condition occurs homoplastically in Gladioglanis Ferraris & Mago-Leccia and Nemuroglanis lanceolatus Eigenmann & Eigenmann (Bockmann & Ferraris, 2005), and Heptapterus multiradiatus Ihering and H. sympterygium Buckup (Buckup, 1988).…”

Section: Phylogenetics Relationships Of Rhamdiopsis Krugimentioning

confidence: 93%

“…However, the resemblance between R. krugi and species of that genus are plesiomorphies only. In addition, Bockmann & Ferraris (2005) diagnosed the group constituted by Horiomyzon, Imparfinis, Mastiglanis, and Nemuroglanis on the basis of the possession of borders of contact between the frontals, sphenotics, pterotics, and supraoccipital mostly smooth. Instead, these bones have conspicuous dentate sutures in R. krugi (Fig.…”

Section: Phylogenetics Relationships Of Rhamdiopsis Krugimentioning

confidence: 99%

“…Such a generic assignment was broadly founded on the aberrant autapomorphies (including troglomorphisms) of R. krugi, which are indeed not informative for accessing its kinship. Inasmuch as the phylogenetic relationships among heptapterids are being progressively clarified (Bockmann, 1998;Bockmann & Ferraris, 2005;Bockmann & Miquelarena, 2008), the proposition of a new genus for R. krugi has been demonstrated to be unnecessary.…”

Section: Phylogenetics Relationships Of Rhamdiopsis Krugimentioning

confidence: 99%

“…These doubts are expressed in its unstable generic allocation, having been included in Imparfinis Eigenmann & Norris (e.g., Trajano & Menna-Barreto, 1995;Trajano, 1996Trajano, , 1997a, Rhamdella Eigenmann & Eigenmann (e.g., Trajano, 1993;Trajano & Sánchez, 1994), Rhamdiopsis Haseman (Trajano, 2007), and even dealt as an undescribed genus (e.g., Trajano, 1997bTrajano, , 1998Trajano, , 2001aTrajano, , 2001bTrajano, , 2003Trajano & Bockmann, 1999a;Trajano & Bichuette, 2006;Volpato & Trajano, 2006). However, the increasing knowledge of the relationships among heptapterids has produced a more rigorous environment for investigating the affinities of this taxon (e.g., Bockmann, 1998;Bockmann & Ferraris, 2005;Bockmann & Miquelarena, 2008). Thus, the present study aims to describe the blind and unpigmented heptapterid from the caves of Chapada Diamantina, State of Bahia, northeastern Brazil, provide a complete synonymy, summarize its ecological and behavioral data, and investigate its phylogenetic and biogeographic relationships.…”

Section: Introductionmentioning

confidence: 99%

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The blind catfish from the caves of Chapada Diamantina, Bahia, Brazil (Siluriformes: Heptapteridae): description, anatomy, phylogenetic relationships, natural history, and biogeography

Bockmann

Castro

2010

Neotrop. ichthyol.

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Rhamdiopsis krugi, a new troglobitic heptapterid catfish, is described from the caves of Chapada Diamantina, State of Bahia, northeastern Brazil. This species, although frequently cited in the scientific literature along the last seventeen years, remained undescribed largely due to its uncertain phylogenetic affinities. The generic assignment of R. krugi was clouded largely by its high number of unusual morphological features (some related to cave life), for instance: absence of eyes and body pigmentation; presence of a widely exposed pseudotympanum; posterior border of the anterior branch and anterior margin of the arborescent portion of the posterior branch of the transverse process of fourth vertebra joined; dorsal hypural plate commonly with seven rays; ventral caudal plate usually with six rays; dorsal and ventral caudal-fin lobes typically with six branched fin rays each; 38-39 vertebrae; anal fin with 14-17 rays; and lateral line very short. Rhamdiopsis krugi can be easily distinguished from its congeners, R. microcephala and R. moreirai, by its troglomorphic features and by the presence of a shorter lateral line, fewer vertebrae and anal-fin rays, pattern of branching of caudal-fin rays, and several attributes of skeletal system. The affinities of this new species are discussed in light of current phylogenetic knowledge of the family Heptapteridae. Incongruent derived characters do not allow selection of a particular hypothesis of sister group relationships among species of Rhamdiopsis. The occurrence of R. krugi in the rio Paraguaçu basin is possibly due to an event of hydrological capture from a section of the middle portion of the rio São Francisco basin, caused by tectonic events. The semi-arid region where R. krugi presently lives was probably covered by a wide forested area during a humid cycle in Quaternary. A summary of natural history and ecology data of R. krugi, as well as notes on its conservation, are provided. We also offer comments on the morphological plasticity of R. krugi.Rhamdiopsis krugi, um novo bagre heptapterídeo troglóbio, é descrito de cavernas da Chapada Diamantina, Estado da Bahia, nordeste do Brasil. Esta espécie, embora frequentemente citada na literatura ao longo dos últimos dezessete anos, não foi descrita antes em função das suas afinidades filogenéticas incertas. A posição genérica de R. krugi foi obscurecida principalmente pelo seu alto número de caracteres morfológicos incomuns (parte deles relacionada à vida nas cavernas), como por exemplo: ausência de olhos e de pigmentação corporal; presença de um pseudotímpano amplamente exposto; borda posterior do ramo anterior e margem anterior da porção arborescente do ramo posterior do processo transverso da quarta vértebra conectados um ao outro; placa hipural dorsal normalmente com sete raios; placa caudal ventral usualmente com seis raios; lobos dorsal e ventral da nadadeira caudal tipicamente com seis raios ramificados cada; 38-39 vértebras; nadadeira anal com 14-17 raios; e linha lateral muito curta. Rhamdiopsis krugi pode ...

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Section: Phylogenetics Relationships Of Rhamdiopsis Krugisupporting

confidence: 52%

Section: Phylogenetics Relationships Of Rhamdiopsis Krugimentioning

confidence: 93%

Section: Phylogenetics Relationships Of Rhamdiopsis Krugimentioning

confidence: 99%

Section: Phylogenetics Relationships Of Rhamdiopsis Krugimentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The blind catfish from the caves of Chapada Diamantina, Bahia, Brazil (Siluriformes: Heptapteridae): description, anatomy, phylogenetic relationships, natural history, and biogeography

Bockmann

Castro

2010

Neotrop. ichthyol.

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Multi-locus phylogeny with dense Guiana Shield sampling supports new suprageneric classification of the neotropical three-barbeled catfishes (Siluriformes: Heptapteridae)

Faustino‐Fuster

Meza‐Vargas

Lovejoy

et al. 2021

Molecular Phylogenetics and Evolution

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Two new species of Heptapterus (Siluriformes: Heptapteridae) from the Uruguay River basin, Brazil

Faustino‐Fuster

Bockmann

Malabarba

2019

Journal of Fish Biology

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As part of an ongoing taxonomic revision of the genus Heptapterus from the Laguna dos Patos and Uruguay River drainages and Atlantic coastal streams of southern Brazil and Uruguay, two new species closely related to Heptapterus mustelinus were identified. Both species are endemic to small tributaries of the Uruguay River. The two new species are distinguished from each other and from other species of Heptapterus by arrangement of cephalic and trunk laterosensory systems, number of vertebrae and number of dorsal, pectoral and anal‐fin rays. Phylogenetic analyses of mitochondrial DNA (coI and cytb) sequence data further supports distinctiveness of the two new species.

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Systematics of the Neotropical Catfish Genera Nemuroglanis Eigenmann and Eigenmann 1889, Imparales Schultz 1944, and Medemichthys Dahl 1961 (Siluriformes: Heptapteridae)

Cited by 33 publications

References 4 publications

The blind catfish from the caves of Chapada Diamantina, Bahia, Brazil (Siluriformes: Heptapteridae): description, anatomy, phylogenetic relationships, natural history, and biogeography

The blind catfish from the caves of Chapada Diamantina, Bahia, Brazil (Siluriformes: Heptapteridae): description, anatomy, phylogenetic relationships, natural history, and biogeography

Multi-locus phylogeny with dense Guiana Shield sampling supports new suprageneric classification of the neotropical three-barbeled catfishes (Siluriformes: Heptapteridae)

Two new species of Heptapterus (Siluriformes: Heptapteridae) from the Uruguay River basin, Brazil

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