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

Autor: Peixoto LAW; Museu de Zoologia da Universidade de São Paulo, Seção de peixes, São Paulo, SP, Brazil., Datovo A; Museu de Zoologia da Universidade de São Paulo, Seção de peixes, São Paulo, SP, Brazil., Campos-da-Paz R; Universidade Federal do Estado do Rio de Janeiro, Centro de Ciências Biológicas e da Saúde, Instituto de Biociências, Rio de Janeiro, RJ, Brazil., de Santana CD; National Museum of Natural History, Smithsonian Institution, Division of Fishes, Department of Vertebrate Zoology, Washington, DC, United States of America., Menezes NA; Museu de Zoologia da Universidade de São Paulo, Seção de peixes, São Paulo, SP, Brazil.
Jazyk: angličtina
Zdroj: PloS one [PLoS One] 2019 Nov 27; Vol. 14 (11), pp. e0225342. Date of Electronic Publication: 2019 Nov 27 (Print Publication: 2019).
DOI: 10.1371/journal.pone.0225342
Abstrakt: A detailed osteological study of the poorly known and critical endangered ghost knifefish, Tembeassu marauna, from the rio Paraná, Brazil, was conducted using X-ray microcomputed tomography (μCT 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.
Competing Interests: The authors have declared that no competing interests exist.
Databáze: MEDLINE
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