Species delimitation reveals an underestimated diversity of Andean catfishes of the family Astroblepidae (Teleostei: Siluriformes)

Author(s)

Luz E. Ochoa ; Bruno F. Melo ^[2] ; Jorge E. García-Melo ; Javier A. Maldonado-Ocampo ^[4] ; Camila S. Souza ^[5] ; Juan G. Albornoz-Garzón ; Cristhian C. Conde-Saldaña ^[7] ; Francisco Villa-Navarro ^[8] ; Armando Ortega-Lara ^[9] ; Claudio Oliveira ^[10]

• Document type: Journal article
• Source: Neotropical Ichthyology; v. 18, n. 4 2020-12-04.

Abstract

ABSTRACT Catfishes of the family Astroblepidae form a group composed by 82 valid species of the genus Astroblepus inhabiting high-gradient streams and rivers throughout tropical portions of the Andean Cordillera. Little has been advanced in the systematics and biodiversity of astroblepids other than an unpublished thesis, a single regional multilocus study and isolated species descriptions. Here, we examined 208 specimens of Astroblepus that apparently belong to 16 valid species from several piedmont rivers from northern Colombia to southern Peru. Using three single-locus approaches for species delimitation in combination with a species tree analysis estimated from three mitochondrial genes, we identified a total of 25 well-delimited lineages including eight valid and 17 potential undescribed species distributed in two monophyletic groups: the Central Andes Clade, which contains 14 lineages from piedmont rivers of the Peruvian Amazon, and the Northern Andes Clade with 11 lineages from trans- and cis-Andean rivers of Colombia and Ecuador, including the Orinoco, Amazon, and Magdalena-Cauca basins and Pacific coastal drainages. Results of species delimitation methods highlight several taxonomical incongruences in recently described species denoting potential synonymies. (AU)

• FAPESP's process: 14/06853-8 - Phylogenetic analysis of the relationships and diversification patterns of Trichomycteridae (Teleostei, Siluriformes) using DNA sequences
• Grantee: Luz Eneida Ochoa Orrego
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 16/19075-9 - Diversity and evolution of Gymnotiformes (Teleostei, Ostariophysi)
• Grantee: Naercio Aquino Menezes
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 17/06551-0 - Characinae (Actinopterygii: Characiformes: Characidae): molecular identification and interspecific phylogenetic relationships
• Grantee: Camila da Silva de Souza
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 14/26508-3 - Phylogeny of the hyperdiverse order Characiformes (Teleostei: Ostariophysi) using ultraconserved elements
• Grantee: Claudio de Oliveira
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 18/23883-9 - Electric fishes of the genus Sternarchorhynchus, a case of adaptative irradiation in continental scale? A phylogenomic and morphological approach
• Grantee: Luz Eneida Ochoa Orrego
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 18/09767-6 - Phylogenomics analysis and taxonomic review of the Neotropical genus Hoplerythrinus (Characiformes: Erythrinidae)
• Grantee: Cristhian Camilo Conde Saldaña
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 16/11313-8 - Phylogeny of the Order Characiformes (Teleostei: Ostariophysi) using ultraconserved elements
• Grantee: Bruno Francelino de Melo
• Support Opportunities: Scholarships in Brazil - Post-Doctoral