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Integrative taxonomy reveals a new species of Characidium (Characiformes: Crenuchidae) shared by tributaries of upper Tapajos and Xingu river basins, Brazil

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Author(s):
Zanata, Angela Maria ; Oliveira, Claudio ; Oliveira-Silva, Leonardo
Total Authors: 3
Document type: Journal article
Source: Journal of Fish Biology; v. N/A, p. 10-pg., 2024-09-22.
Abstract

A new species of Characidium shared by adjacent tributaries of the upper portions of the Tapajos and Xingu river basins is described. Characidium varii, new species, can be distinguished from the congeners by having distinctly speckled pattern of colouration, including dark blotches on cheek and ventral surface of head, by having conspicuous dark marks on fins, along with a single row of dentary teeth, isthmus completely covered by scales, 14 circumpeduncular scales, and swimbladder reduced. Molecular data reinforce the validation of the new species. The distribution of C. varii supports the hypothesis of the existence of a faunistic mixing between Tapajos and Xingu river basins, corresponding to the region of the Serra do Cachimbo and surrounding areas, previously proposed in the literature. (AU)

FAPESP's process: 20/13433-6 - Phylogeny and molecular identification of fishes of the superorder Ostariophysi (Chordata: Actinopterygii) using genomic approaches
Grantee:Claudio de Oliveira
Support Opportunities: Research Projects - Thematic Grants
FAPESP's process: 11/50282-7 - An inventory of the Characiform fish fauna (Teleostei, Ostariophysi) from South America
Grantee:Naercio Aquino Menezes
Support Opportunities: BIOTA-FAPESP Program - Thematic Grants
FAPESP's process: 23/09871-6 - Unraveling the diversity and origins of the genus Characidium (Characiformes: Crenuchidae) in the Neotropical region: a study of Systematics and Biogeography with a genomic and integrative approach
Grantee:Leonardo Oliveira Silva
Support Opportunities: Scholarships in Brazil - Post-Doctoral