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BIBTEX RIS

New species of the genus Spectracanthicus ( L oricariidae, H ypostominae, A ncistrini) from the R io J avaés ( R io A raguaia basin), with a description of gross brain morphology

2018; Wiley; Volume: 92; Issue: 2 Linguagem: Inglês

10.1111/jfb.13526

1095-8649

Carine C. Chamon, Thiago Nilton Alves Pereira, Marina Barreira Mendonça, Alberto Akama,

Ichthyology and Marine Biology

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.