Cetopsis varii, a new species of whale catfish (Siluriformes: Cetopsidae) from the Meta Basin, Colombia

Cetopsis varii sp. nov. Cetopsidae (Cetopsinae) is described from the Río Meta basin in eastern Colombia, at middle portions of the Río Orinoco basin. The new species differs from congeners by a combination of features: the absence of a humeral spot, presence of eye, conical teeth on vomer and denta...

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Bibliographic Details
Published in:Journal of fish biology 2018-07, Vol.93 (1), p.110-118
Main Authors: Abrahão, Vitor Pimenta, Pinna, Mario C. C.
Format: Article
Language:English
Subjects:
Aquatic mammals
Biocompatibility
Biomedical materials
Catfish
Cetopsidae
cetopsinae
Cetopsis
Computed tomography
Congeners
Freshwater fishes
Humerus
Marine mammals
neotropical systematics
New species
orinoquia
Osteology
Phylogeny
Physical characteristics
Pigmentation
taxonomy
Teeth
Tomography
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Description
Summary:Cetopsis varii sp. nov. Cetopsidae (Cetopsinae) is described from the Río Meta basin in eastern Colombia, at middle portions of the Río Orinoco basin. The new species differs from congeners by a combination of features: the absence of a humeral spot, presence of eye, conical teeth on vomer and dentary and rounded posterior nares, along with details of body, dorsal and caudal‐fin pigmentation. The osteology of the new species is investigated through high‐resolution X‐ray computed tomography and cleared and stained specimens. Data thus obtained are used to code the new species for character states utilized in a previous phylogenetic analysis of Cetopsidae. Analysis of the expanded matrix shows that C. varii is the sister group to C. orinoco.
ISSN:0022-1112
1095-8649
DOI:10.1111/jfb.13643