Journal article
Revision of the South American catfish genus Hypophthalmus (Siluriformes, Pimelodidae) with descriptions of two new species from the Amazon and Orinoco Basins
Proceedings of the Academy of Natural Sciences of Philadelphia, v 167(1), pp 171-223
09 Jul 2021
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
The pimelodid genus Hypophthalmus is a small group of pelagic and planktivorous catfishes that are abundant and variously distributed in the lowland river basins of the Amazon, Parnaíba, Orinoco, Guianas and Paraná. Since their earliest published descriptions, commencing over 190 years ago with H. edentatus Spix and Agassiz 1829, the taxonomy and nomenclature of Hypophthalmus species have been confused and unresolved. In this study, four of the six available species names are validated and two new species are described. Newly discovered characters of the vertebral column, circumoral barbels, pelvic fins, and lateralis sensory canals provide strong support and diagnostics for species and species-groups. A key to species, anatomical descriptions, notes on identification of small juveniles and phylogenetic interrelationships are included. A lectotype is designated for Hypophthalmus marginatus and nominal Hypophthalmus longifilis, respectively.
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Details
- Title
- Revision of the South American catfish genus Hypophthalmus (Siluriformes, Pimelodidae) with descriptions of two new species from the Amazon and Orinoco Basins
- Creators
- Michael W. Littmann - Field Museum of Natural HistoryJohn G. Lundberg - Drexel UniversityMarcelo Salles Rocha
- Publication Details
- Proceedings of the Academy of Natural Sciences of Philadelphia, v 167(1), pp 171-223
- Publisher
- Academy of Natural Sciences of Philadelphia
- Number of pages
- 54
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Academy of Natural Sciences of Drexel University
- Web of Science ID
- WOS:000796758500003
- Other Identifier
- 991019335499004721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Biodiversity Conservation
- Ecology