Journal article
Taxonomic discrimination and identification of extant blue catfishes (Siluriformes: Ictaluridae: Ictalurus furcatus Group)
Proceedings of the Academy of Natural Sciences of Philadelphia, v 159(1), pp 67-82
01 Oct 2010
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Abstract
Three species of the Ictalurus furcatus Group (genus Ictalurus) are recognized: I. furcatus, I. meridionalis and I. balsanus. These species are differentially diagnosed by characters of the bony skeleton, tin-ray and vertebral counts, morphometrics and coloration. Ictalurus balsanus is distinctive in having a relatively short supraoccipital process, anterior nuchal plate and posterior cleithral process, weakly developed pectoral-tin spine ornamentation, and an elongated posterolateral premaxillary process. Ictalurus furcatus and I. meridionalis are closely similar species but are clearly distinguished by features of the pectoral-fin spine ornamentation, supraoccipital process shape and texture, posterior cleithral process shape, numbers of anal-fin rays and vertebrae, and related proportional measurements of anal-fin and caudal peduncle length. Apparent differences among the three species in maximum size and coloration are also noted. A limited sample of molecular sequence data from the 12S/16S mitochondrial DNA loci is consistent with morphology-based results indicating that I. meridionalis is a species distinct from I. furcatus, and that I. balsanus is the most divergent species of the three. Ictalurus furcatus and I. meridionalis exhibit inter-river basin variation in numbers of vertebrae and anal-fin rays.
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Details
- Title
- Taxonomic discrimination and identification of extant blue catfishes (Siluriformes: Ictaluridae: Ictalurus furcatus Group)
- Creators
- Rocio Rodiles-Hernandez - El Colegio de la Frontera SurJohn G. Lundberg - Academy of Natural Sciences of Drexel UniversityJohn P. Sullivan - Academy of Natural Sciences of Drexel University
- Publication Details
- Proceedings of the Academy of Natural Sciences of Philadelphia, v 159(1), pp 67-82
- Publisher
- Academy of Natural Sciences of Philadelphia
- Number of pages
- 16
- Grant note
- DEB-0315963 / All Catfish Species Inventory (ACSI, US National Science Foundation); National Science Foundation (NSF)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Academy of Natural Sciences of Drexel University
- Web of Science ID
- WOS:000208413000005
- Scopus ID
- 2-s2.0-78651080638
- Other Identifier
- 991019335233504721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Biodiversity Conservation
- Ecology