Anatomical, taxonomic, and phylogenetic reappraisal of a poorly known ghost knifefish, Tembeassu marauna (Ostariophysi: Gymnotiformes), using X-ray microcomputed tomography

Autor(es)

Peixoto, Luiz A. W. ^[1] ; Datovo, Alessio ^[1] ; Campos-da-Paz, Ricardo ^[2] ; de Santana, Carlos D. ^[3] ; Menezes, Naercio A. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Seca Peixes, Museu Zool, Sao Paulo, SP - Brazil

^[2] Univ Fed Estado Rio de Janeiro, Ctr Ciencias Biol & Saude, Inst Biociencias, Rio De Janeiro, RJ - Brazil

^[3] Smithsonian Inst, Natl Museum Nat Hist, Div Fishes, Dept Vertebrate Zool, Washington, DC 20560 - USA

• Tipo de documento: Artigo Científico
• Fonte: PLoS One; v. 14, n. 11 NOV 27 2019.
• Citações Web of Science: 0

Resumo

A detailed osteological study of the poorly known and critical endangered ghost knifefish, Tembeassu marauna, from the rio Parana, Brazil, was conducted using X-ray microcomputed tomography (mu CT scan). A redescription of the external anatomy was performed, including the unusual presence of a rostral patch of extra teeth on the region of the upper lip anterior to the premaxilla and the prominent anterior fleshy expansions in both upper and lower lips. The newly surveyed characters were included and analyzed in light of a recent morphological data matrix for Gymnotiformes. In spite of some uncertainties that remains as to phylogenetic allocation of the genus, the most probable hypothesis is that Tembeassu is the sister group of a clade that includes Megadontognathus and Apteronotus sensu stricto. The phylogenetic analysis also supports that Tembeassu is considered a valid genus of Apteronotidae. An amended diagnosis for the genus is also provided. (AU)

• Processo FAPESP: 16/19075-9 - Diversidade e evolução de Gymnotiformes (Teleostei, Ostariophysi)
• Beneficiário: Naercio Aquino Menezes
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 18/05084-1 - Evolução da musculatura esquelética de Gymnotiformes (Teleostei: Ostariophysi)
• Beneficiário: Luiz Antonio Wanderley Peixoto
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado