Parotocinclus yaka, a new species of armored catfish (Loricariidae: Hypoptopomatinae), from the Amazon basin in Brazil

Autor(es)

Lehmann, Pablo A. ^[1] ; Lima, Flavio C. T. ^[2] ; Reis, Roberto E. ^[3]

Afiliação do(s) autor(es)

^[1] Univ Vale Rio dos Sinos, Lab Ictiol, Av Unisinos 950, BR-93022000 Sao Leopoldo, RS - Brazil

^[2] Univ Estadual Campinas Adao Jose Cardoso, Museu Zool, Caixa Postal 6109, BR-13083863 Campinas, SP - Brazil

^[3] Pontificia Univ Catolica Rio Grande do Sul, Lab Sistemat Vertebrados, POB 1429, BR-90619900 Porto Alegre, RS - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Zootaxa; v. 4521, n. 4, p. 584-592, NOV 16 2018.
• Citações Web of Science: 2

Resumo

Parotocinclus yaka is described as a new species of hypoptopomatine cascudinho from tributaries of the Rio Tiquie, tributary to the Rio Uaupes, upper Rio Negro drainage, Amazon basin, Amazonas State, Brazil. The new species is distinguished from its congeners in northeastern and southeastern Brazil by having the cheek canal plate elongated posteriorly on the ventral surface of the head and in contact with the cleithrum. Parotocinclus yaka is diagnosed from the Parotocinclus species of the Amazon, Orinoco and Guianas watersheds by having a conspicuous dark spots smaller than the pupil diameter distributed dorsally and laterally on the head; it is also differentiated from P polyochrus (Casiquiare, Venezuela), P. longirostris (Rio Amazonas, Brazil), and P. eppleyi (Rio Orinoco) by the absence of a Y-shaped light mark dorsally on the head. In addition, the absence of premaxillary and dentary accessory teeth and the presence of a Y-shaped spot on the snout distinguish the new species from P. collinsae (Essequibo River, Guyana), P. halbothi (Rio Trombetas, Brazil and Marowijne River, Suriname) and P. variola (Rio Amazonas, Colombia). Parotocinclus yaka also differs from P. amazonensis (lower Amazon basin), P. aripuanensis (lower Amazon basin), P. britskii (Guyana, Suriname, eastern Venezuela, and Amapa State, Brazil), and P. dani (Rio Tapajos basin), by having more numerous oral teeth. The new species described herein is part of the group of small cascudinhos usually associated with marginal or submerged vegetation and submerged logs, of moderate current and clear transparency, found in conserved habitats in streams of the Amazon, Orinoco and Guianas rivers. (AU)

• Processo FAPESP: 13/20936-0 - Sistemática das piabas (gêneros Hemigrammus, Hyphessobrycon, Thayeria, Parapristella e Bryconella), com ênfase nas espécies do norte da América do Sul cis-andina
• Beneficiário: Flávio César Thadeo de Lima
• Modalidade de apoio: Bolsas no Brasil - Jovens Pesquisadores
• Processo FAPESP: 11/51532-7 - Sistemática das piabas (gênero Hemigrammus, Hyphessobrycon, Parapristella e Bryconella), com ênfase nas espécies do norte da América do Sul cisandina
• Beneficiário: Flávio César Thadeo de Lima
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores