Journal article
Integrative Taxonomy Reveals a New Species of Imparfinis (Siluriformes: Heptapteridae) from the Upper Xingu River Basin
Ichthyology & herpetology (Lawrence, Kan. : Print), v 113(1), pp 143-153
01 Apr 2025
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Abstract
Imparfinis is a genus of small catfishes with 21 valid species broadly distributed throughout the main river basins of the Neotropical region. Here, a new species of Imparfinis is described from the headwaters of the Rio Xingu. The new species is distinguished from its congeners by the presence of a wide dark stripe from snout tip to caudal peduncle sharply contrasting pale underside and aligned with dark stripe centered on dorsal portion of lower caudal-fin lobe, 11-12 gill rakers on the first ceratobranchial, 39 vertebrae, maxillary barbel surpassing vertical through dorsal-fin origin, and absence of short, flexible extension of the anteriormost pectoral, dorsal, and upper caudal-fin rays. In addition, assemble species by automatic partitioning (ASAP) and the Poisson tree processes model (bPTP) analyses support the validity of this new species. Our molecular phylogeny based on the cytochrome c oxidase subunit 1 mitochondrial gene (COI) corroborates the placement of the new species in Imparfinis and its close relationship with I. guttatus. Species delimitation in Imparfinis is discussed.
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Details
- Title
- Integrative Taxonomy Reveals a New Species of Imparfinis (Siluriformes: Heptapteridae) from the Upper Xingu River Basin
- Creators
- Gabriel de Souza da Costa e Silva - Drexel UniversityMark Henry Sabaj - Drexel UniversityKaylane Rodrigues de Carvalho - Universidade Estadual Paulista (Unesp)Claudio Oliveira - Univ Estadual Paulista, Inst Biociencias Botucatu, UNESP, IBB, BR-18618970 Botucatu, SP, Brazil
- Publication Details
- Ichthyology & herpetology (Lawrence, Kan. : Print), v 113(1), pp 143-153
- Publisher
- American Society for Ichthyologists & Herpetologists
- Number of pages
- 11
- Grant note
- 2021/12979-8; 2022/13025-0; 2020/13433-6; NSF DEB 1257813 / Fundacao de Amparo a Pesquisa do Estado de Sao Paulo-FAPESP grant; Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) DEB 0315963 / All Catfish Species Inventory (NSF) NSF DEB 1257813 / IXingu Project 306054/2006-0 / Brazilian agencies Conselho Nacional de Desenvolvimento Cientimath;fico e Tecnologico-CNPq proc; Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPQ); Fundacao de Apoio a Pesquisa do Distrito Federal (FAPDF)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Ichthyology
- Web of Science ID
- WOS:001470530800012
- Scopus ID
- 2-s2.0-105015847412
- Other Identifier
- 991022197317404721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Zoology