Redescription of Orthosternarchus tamandua (Boulenger, 1898) (Gymnotiformes, Apteronotidae), with reviews of its ecology, electric organ discharges, external morphology, osteology, and phylogenetic affinities

Hilton, Eric J.; Fernandes, Cristina Cox; Sullivan, John P.; Lundberg, John G.; Campos-da-Paz, Ricardo

doi:10.1635/0097-3157(2007)156[1:rootbg]2.0.co;2

Cited by 32 publications

(89 citation statements)

References 16 publications

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“…Intermuscular bones in the adductor mandibulae were noted by Albert (2001: character 44) in Rhamphichthys. We also observe a small number of intermuscular bones in the adductor mandibulae in Gymnotus carapo Linnaeus (USNM 225286), and a similar condition was described for Orthosternarchus tamandua Boulenger (Hilton et al, 2007). According to these authors O. tamandua also possesses intermuscular in the levator operculi and dilator operculi.…”

Section: Inpa 17646)supporting

confidence: 80%

“…Displaced hemal spines all of similar size; absence of enlarged anterior displaced hemal spine (Albert, 2001: fig. 35c-d; posteroventral abdominal bone of Hilton et al, 2007: fig. 16b).…”

Section: Branchial Basket Gill Arches Illustrated Inmentioning

confidence: 99%

“…The presence of reticulated texture to bones (including the opercle) is a derived trait in several other clades of gymnotiforms that inhabit the benthos of large river channels, especially Apteronotidae (except Apteronotus La Cepède s.s.; Albert, 2001: fig. 18: character 82; see also Hilton et al, 2007), and some species of the sternopygid genera Distocyclus Mago-Leccia, Eigenmannia Jordan & Evermann and Rhabdolichops Eigenmann & Allen. The function of the reticulated bone morphology is unknown, but as the pores and pits are usually filled with lipids and the trait may aid in reducing negative buoyancy.…”

Section: Inpa 17646)mentioning

confidence: 99%

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Redescription and phylogenetic position of the enigmatic Neotropical electric fish Iracema caiana Triques (Gymnotiformes: Rhamphichthyidae) using x-ray computed tomography

Carvalho

Albert

2011

Neotrop. ichthyol.

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We redescribe Iracema caiana, a monotypic genus of the gymnotiform electric fish family Rhamphichthyidae. Iracema is known only from the type series (holotype and three paratypes) collected from the rio Jauaperi, affluent to the rio Negro in the Amazon basin, and was never collected again. Previous morphological studies were limited to features of external morphology. To study the osteology of Iracema we examined two specimens of different sizes using high-resolution x-ray computed tomography, a non-invasive and non-destructive technique to visualize internal anatomical structures. We describe and illustrate the osteology of Iracema caiana, and present data on morphometrics and external morphology. Contrary to previous hypotheses we propose that Iracema is the sister group to Rhamphichthys based on four synapomorphies: intermuscular bones present in the adductor mandibulae, reticulated texture of opercles, fully ossified Baudelot's ligaments, and elongate scales above the lateral line in the posterior portion of the body.Iracema caiana, um genêro monotípico de peixes elétricos Gymnotiformes da família Rhamphichthyidae, é aqui redescrito. Iracema é conhecido apenas da série-tipo (holótipo e três parátipos) coletado no rio Jauaperi, afluente do rio Negro na bacia amazônica, nunca sendo coletado novamente. Estudos morfológicos prévios de Iracema foram limitados somente à morfologia externa. Neste trabalho, a osteologia do gênero foi examinada com base em dois espécimes de diferentes tamanhos usandose tomografia computadorizada de alta resolução, uma técnica não invasiva para a visualização de estruturas anatômicas internas. Caracteres externos e morfométricos são apresentados e a osteologia é ilustrada e descrita. Contrariamente a hipóteses prévias, Iracema é proposto como grupo irmão de Rhamphichthys com base em quatro sinapomorfias: presença de ossos intermusculares no adductor mandibulae, textura reticulada do opérculo, ligamento de Baudelot completamente ossificado e escamas alongadas na região posterior do corpo acima da linha lateral.

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Section: Inpa 17646)supporting

confidence: 80%

“…Displaced hemal spines all of similar size; absence of enlarged anterior displaced hemal spine (Albert, 2001: fig. 35c-d; posteroventral abdominal bone of Hilton et al, 2007: fig. 16b).…”

Section: Branchial Basket Gill Arches Illustrated Inmentioning

confidence: 99%

Section: Inpa 17646)mentioning

confidence: 99%

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Redescription and phylogenetic position of the enigmatic Neotropical electric fish Iracema caiana Triques (Gymnotiformes: Rhamphichthyidae) using x-ray computed tomography

Carvalho

Albert

2011

Neotrop. ichthyol.

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“…The neurocranium, suspensorium, and pectoral girdle were removed from all specimens using standard methods for the dissection of small teleosts (Weitzman, 1974). Osteological homology and nomenclature followed Hilton et al (2007) and de Santana and Vari (2010a), except for lateral line system nomenclature, which follow Arratia and Huaquin (1995) and de Santana and Crampton (2011).…”

Section: Methodsmentioning

confidence: 99%

A New Species of Sexually Dimorphic Electric Knifefish from the Amazon Basin, Brazil (Gymnotiformes: Apteronotidae)

Santana

Fernandes

2012

Copeia

Self Cite

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“…Orthosternarchus tamandua (Boulenger, 1898) Sternarchus tamandua Boulenger, 1898: 427, pl Remarks: Redescribed, with anatomical and phylogenetic information, in Hilton et al (2007).…”

Section: Species Inquirenda Apteronotusmentioning

confidence: 99%

Checklist of Gymnotiformes (Osteichthyes: Ostariophysi) and catalogue of primary types

2017

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A list of all valid names of species of Neotropical electric fishes (Gymnotiformes) is presented herein. The list is arranged by family and genus and includes all available synonyms. The list is comprehensive through 2016 and includes 240 valid species distributed among 34 genera and five families, including one monotypic genus known only from the fossil record. The presented classification reflects recently published interpretations about the validity of the included names which, in general, are widely accepted. When the validity of a particular name is disputed in recent literature, we followed one of the published interpretations and provide relevant information on the alternate interpretation(s) in the remarks section of that name. Synonymies of some names need to be considered tentative, inasmuch as the types underlying those names are either absent or appear to be based on more than one taxon. First reviser actions (e.g., lectotype and neotype designations, resolution of simultaneous synonyms, etc.) are reported and include erroneous subsequent attempts at problem resolutions. Herein, we include one new first reviser action by selecting Gymnotus aequilabiatus Humboldt, 1805, as type species of Sternopygus because previous attempts to select a type did not follow the provisions of the Code of Zoological Nomenclature.Keywords: Apteronotidae, Gymnotidae, Hypopomidae, Rhamphichthyidae, Sternopygidae.Uma lista de todas as espécies válidas de peixes elétricos neotropicais (Gymnotiformes) é apresentada. A lista é organizada por família e gênero, e inclui todos os sinônimos válidos. A lista encontra-se atualizada até 2016 e inclui 240 espécies válidas viventes distribuídas entre os 34 gêneros e cinco famílias, e um gênero monotípico conhecido apenas por registros fósseis. A presente classificação reflete as recentes interpretações publicadas sobre a validade dos nomes incluídos, nos quais, em geral, são amplamente aceitos. Quando a validade de um nome em particular é disputada na literatura recente, nós seguimos uma das interpretações publicadas, e fornecemos informações relevantes sobre a(s) interpretação(ões) na seção de comentários do nome em questão. Sinônimos de alguns nomes precisam ser considerados com cautela, tendo em vista que os tipos para estes nomes são ausentes, ou parecem ser baseados em mais de um táxon. As primeira ações de revisão (e.g., designação de lectótipos e neótipos, resolução na designação simultânea de sinônimos, etc.) são registradas e incluem os esforços errôneos subsequentes para a solução do problema. Aqui, nós incluímos uma primeira ação de revisão selecionando Gymnotus aequilabiatus Humboldt, 1805, como a espécie-tipo de Sternopygus, porque os esforços prévios para selecionar o tipo não seguiram as recomendações do Código de Nomenclatura Zoológica.

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Redescription of Orthosternarchus tamandua (Boulenger, 1898) (Gymnotiformes, Apteronotidae), with reviews of its ecology, electric organ discharges, external morphology, osteology, and phylogenetic affinities

Cited by 32 publications

References 16 publications

Redescription and phylogenetic position of the enigmatic Neotropical electric fish Iracema caiana Triques (Gymnotiformes: Rhamphichthyidae) using x-ray computed tomography

Redescription and phylogenetic position of the enigmatic Neotropical electric fish Iracema caiana Triques (Gymnotiformes: Rhamphichthyidae) using x-ray computed tomography

A New Species of Sexually Dimorphic Electric Knifefish from the Amazon Basin, Brazil (Gymnotiformes: Apteronotidae)

Checklist of Gymnotiformes (Osteichthyes: Ostariophysi) and catalogue of primary types

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