A new species of Cetopsis from the Guiana Shield (Siluriformes: Cetopsidae: Cetopsinae)

Author(s)

Abrahao, Vitor ^{[1, 2]} ; Mol, Jan ^{[3, 4]} ; De Pinna, Mario ^[1]

Affiliation

^[1] Univ Sao Paulo, Museu Zool, Setor Ictiol, Brazil Ave Nazare 481, BR-04263000 Sao Paulo, SP - Brazil

^[2] Univ Fed Bahia, Inst Biol, Rua Barrao Geremoabo 147, BR-40170115 Salvador, BA - Brazil

^[3] Anton de Kom Univ Suriname, Ctr Agr Res Suriname CELOS Prof Dr Ir J Ruinardla, Paramaribo - Surinam

^[4] Dept Biol, POB 9212, Paramaribo - Surinam

• Document type: Journal article
• Source: Zootaxa; v. 4664, n. 2, p. 221-232, SEP 3 2019.
• Web of Science Citations: 0

Abstract

A new species of Cetopsis is described from Guiana Shield drainages in Guyana and Suriname. The new species is found in the Konawaruk River and tributaries, Essequibo River basin, Guyana, and in the Mauritie Creek, tributary to the Tempati River, upper Commewijne River basin, Suriname. The new taxon can be distinguished from all congeners by a combination of features: dark spots on sides of the body eye-sized or larger, dark, bilobed patch at the base of the caudal fin, absence of a dark humeral spot, absence of dark pigmentation along the fin-membrane posterior to the first dorsal-fin ray, dark pigmentation at the base of the dorsal fin, dark spots extending ventrally to the bases of anal-fin rays, and 41 total vertebrae with 28 caudal vertebrae. Data on internal anatomy of the new species were incorporated into a previously-published phylogenetic analysis and resolves the position of the new species as the sister group of C. motatanensis, from Lago Maracaibo basin. The new Cetopsis is the first species of the genus known to occur exclusively in the Guiana Shield. (AU)

• FAPESP's process: 15/26804-4 - Integrating morphological and molecular data in the systematics of three siluriform subgroups: subfamily Copionodontinae (Trichomycteridae), genus Pimelodella (Heptapteridae) and family Cetopsidae
• Grantee: Mario Cesar Cardoso de Pinna
• Support Opportunities: Regular Research Grants
• FAPESP's process: 17/17957-7 - COMPARATIVE NEUROANATOMY IN CETOPSIDAE (OSTARIOPHYSI: SILURIFORMES) AND SIMULTANEOUS ANALYSIS OF MORPHOLOGICAL AND MOLECULAR DATA
• Grantee: Vitor Pimenta Abrahão
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate
• FAPESP's process: 14/11397-1 - Phylogenetic relationships in the family Cetopsidae (Osteichthyes, Ostariophysi, Siluriformes) with simultaneous analysis of morphological and molecular data
• Grantee: Vitor Pimenta Abrahão
• Support Opportunities: Scholarships in Brazil - Doctorate