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Ictalurus nazas Avila-Treviño, Cardoza-Martínez, Alonzo-Rojo & Pérez-Rodríguez, 2025 |
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Relevant Information: |
Abstract: Catfishes of the genus Ictalurus (Ictaluridae) range geographically from southern Canada to northern Guatemala and Belize. The systematics of this genus remain unresolved, with recent studies suggesting the presence of cryptic diversity. This is the case for a potentially undescribed catfish species distributed in the Nazas River basin, which has been recorded to date as a population of Ictalurus pricei. Recent phylogenetic studies suggest that it represents an independently evolving lineage that is distinct from Ictalurus pricei. This study aimed to determine the diagnostic characters that differentiate the Nazas River basin lineage and to describe this lineage as a new taxon. Morphological comparisons were made using meristic and morphometric characters. The study identified useful meristic and morphometric characters for diagnosing Ictalurus nazas sp. nov., which differentiate it from I. pricei (Avila-Treviño E, et al, 2025). Habitat: The species inhabits slow-moving waters with temperatures ranging from 17 to 22 °C. It is generally found in areas with exposed bedrock slabs and crevices that provide refuge. Etymology: The specific name nazas: Is derived from the name of the basin in which the species is distributed and to which it is endemic. |
Common Name: |
None |
Synonyms: |
None |
Family: |
Ictaluridae |
Distribution: |
North America: Ramos River, 1.12 km north of El Olote, Santiago Papasquiaro, Durango, Mexico. Type locality: Ramos River 1.12 km north of El Olote, Santiago Papasquiaro, Durango, Mexico, endorheic drainage Ramos River; 25°14'13.2"N, -105°27'0.4"W. |
Size: |
30.0cm. (12ins) |
Temp: |
20-23°C (67-73°F) |
p.H. |
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6.0-7.5. |
IUCN Red List |
Not evaluated. |
Reference: |
Avila-Treviño
E, Cardoza-Martínez GF, Alonzo-Rojo F, Pérez-Rodríguez
R (2025) Ictalurus nazas sp. nov.,
a new species of North American catfish (Siluriformes,
Ictaluridae) from Mexico. ZooKeys 1248: 33-51. |
Family: Ictaluridae Back to Ident-A-Cat Click on Thumbnails |
Ictalurus
nazasHolotype-Ramos River, 1.12 km north of El Olote, Santiago Papasquiaro, Durango, Mexico, endorheic drainage Ramos River |
 Ictalurus
nazasType locality-Ramos River, 1.12 km north of El Olote, Santiago Papasquiaro, Durango, Mexico, endorheic drainage, Ramos River; 25°14'13.2"N, -105°27'0.4"W |
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