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| Trichomycterus lauryi
Donin, Ferrer & Carvalho, 2020
DOI: 10.1111/jfb.14278
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Abstract
A new species of Trichomycterus endemic to the Ribeira de Iguape River basin, southeastern Brazil, was studied based on morphological and molecular evidence. This species had an outer layer of coloration composed of scattered, round, black or dark‐brown spots smaller or equivalent in size to the circumference of the eye; eight pectoral‐fin rays; 28–29 opercular odontodes; 54–56 interopercular odontodes; and supraorbital line of the laterosensory system not interrupted, with pores s2 absent. Two other species of Trichomycterus from the Ribeira de Iguape River basin are recorded, and their taxonomic status is discussed: Trichomycterus alternatus and Trichomycterus jacupiranga were not differentiated using molecular analysis but may be consistently distinguished based on morphology. The phylogenetic relationships of the co‐occurring species, T. alternatus and Cambeva zonata, were inferred using mitochondrial data, reinforcing the taxonomic status of these recently revised species that have a complex taxonomy. In addition, a new combination for Trichomycterus taroba with its inclusion in the genus Cambeva is recommended.
Keywords: Cambeva zonata, colour pattern, incomplete lineage sorting, Trichomycterinae, Trichomycterus alternatus
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| Figure 2: Colour variation in live specimens of Trichomycterus lauryi. (A) UFRGS 24536, 60.7 mm LS, córrego do Queimado; (C) UFRGS 24537, 77.0 mm LS, rio Betari; (D) UFRGS 24537, 68.9 mm LS, rio Betari; Ribeira de Iguape River basin |
Trichomycterus lauryi sp. nov.
Etymology: The specific epithet “lauryi” was given in honour of Laury João Donin (in memoriam), Laura Donin's father.
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| Photograph of the specimen provided by Miranda Ribeiro (1908b, 1911) presently identified as Trichomycterus lauryi. |
Laura M. Donin, Juliano Ferrer and Tiago P. Carvalho. 2020. Taxonomical Study of Trichomycterus (Siluriformes: Trichomycteridae) from the Ribeira de Iguape River Basin reveals A New Species Recorded in the early 20th Century. Journal of Fish Biology. DOI: 10.1111/jfb.14278
