Journal Article
Comparative Morphology and Generic Classification of Catfishes of the Trichomycterus Lineage (Siluriformes: Trichomycteridae)
Costa, W.J.E.M.
Record Number:
7120
Year:
2026
Journal:
Taxonomy
Pages:
34 pages
Volume:
6, 20
Notes:
Copyright: © 2026 by the author. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license
Abstract:
Recent genomic phylogenies have generated new robust classifications of actinopterygian
fishes, making possible greater nomenclatural stability, but genus-level classifications of
groups like the diverse catfish subfamily Trichomycterinae are still unclear, containing illdefined paraphyletic taxa. The focus of the present study is the Trichomycterus Lineage (TL), a clade with great morphological diversity, containing about 170 species widely distributed in South America, occurring in the most important biodiversity hotspots of the world, such as the Atlantic Forest, Cerrado, and the Tropical Andes. Most species are small, but at least one reaches about 400 mm of total length, being used as food and depicted in pre-Hispanic Andean ceramics. Based on a comparative morphological analysis, mainly using osteological characters, supported by concordant genomic phylogenies, a new classification at the genus level is here provided. Many morphological features delimiting TL genera seem to be related to ecological adaptations. Nine genera are here recognised of which five are new. Recognition of the new genera will allow easier descriptions of new species and consequently better biodiversity estimates.
Keywords: Andes; eastern South America; Lago Titicaca; new genera; osteology; Pacific
drainages
Times Cited:
1
Relevent Species:
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