New species of the genus Spectracanthicus (Loricariidae, Hypostominae, Ancistrini) from the Rio Javaés (Rio Araguaia basin), with a description of gross brain morphology.

Autor: Chamon CC; Laboratório de Ictiologia Sistemática, Universidade Federal do Tocantins, Campus Universitário de Porto Nacional, Setor Jardim dos Ipês, Rua 3, Quadra 17, s/no, Caixa Postal 136, CEP: 77500-000 Tocantins, TO, Brazil., Pereira TNA; Laboratório de Ictiologia Sistemática, Universidade Federal do Tocantins, Campus Universitário de Porto Nacional, Setor Jardim dos Ipês, Rua 3, Quadra 17, s/no, Caixa Postal 136, CEP: 77500-000 Tocantins, TO, Brazil., Mendonça MB; Museu Paraense Emílio Goeldi-Campus de Pesquisa, Setor de Ictiologia, Av. Perimetral, 1901, CEP: 66077-530 Belém, PA, Brazil., Akama A; Museu Paraense Emílio Goeldi-Campus de Pesquisa, Setor de Ictiologia, Av. Perimetral, 1901, CEP: 66077-530 Belém, PA, Brazil.
Jazyk: angličtina
Zdroj: Journal of fish biology [J Fish Biol] 2018 Feb; Vol. 92 (2), pp. 438-451. Date of Electronic Publication: 2018 Jan 18.
DOI: 10.1111/jfb.13526
Abstrakt: A new species of Spectracanthicus is described from the Rio Javaés, Rio Araguaia basin. The new species is distinguished from its congeners (except Spectracanthicus immaculatus) by colour pattern: body dark grey to dark brown without dots or blotches (v. body colour with yellowish small dots in Spectracanthicus murinus, Spectracanthicus punctatissimus and Spectracanthicus tocantinensis and large white dots in Spectracanthicus zuanoni). It can be further distinguished from S. immaculatus by having thicker and less numerous teeth, with up to eight premaxillary and 20 dentary teeth (v. teeth thinner and more numerous with up to 22 premaxillary and 30 dentary teeth); dorsal and caudal fins without curved spines (v. dorsal and caudal fins with curved spines). Other osteological characters can also diagnose the new species from its congeners. In addition, a gross brain description and brief comments on the new species' ecological habitat are given.
(© 2018 The Fisheries Society of the British Isles.)
Databáze: MEDLINE
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