Callichthys
Roberto E. Reis
Type-species: Silurus callichthys Linnaeus, 1758.
This genus is under study by the page's author. There is evidence that
more than one species occurs in South America. See the Complete
Catalogue for authorships, synonyms, type-localities, and references.
- Callichthys callichthys
- more Callichthys species to be described
Diagnosis
The genus Callichthys is diagnosed by having the cranial articulation of the hyomandibula far from the prootic; the metapterygoid with a dorsal projection directed towards the hyomandibula; and the ridge for insertion of the levator operculi muscle near the anterodorsal border of the opercle. Further on these uniquely derived features, Callichthys possesses infraorbital bones covered with skin; does not have inner expansions on the second infraorbital; and does not posses transversal processes on the dorsal-fin proximal radials.
Distribution
The genus Callichthys is distributed in most freshwater drainages of South America, and is usually identified as C. callichthys. There is, however, both morphological and chromosomal evidence that this species is a "complex" of very similar species.
Title Illustrations
| Scientific Name | Callichthys callichthys |
|---|---|
| Location | Sobo, Trinidad |
| Image Use |
 This media file is licensed under the Creative Commons Attribution-NonCommercial License - Version 3.0.
|
| Copyright |
© Roberto E. Reis
|
About This Page
Roberto E. Reis
Museu de Ciências e Tecnologia da PUCRS, Porto Alegre, Brazil
Page copyright © 1996 Roberto E. Reis
Page: Tree of Life
Callichthys.
Authored by
Roberto E. Reis.
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- First online 29 April 1996
- Content changed 29 April 1996
Citing this page:
Reis, Roberto E. 1996. Callichthys. Version 29 April 1996 (under construction). http://tolweb.org/Callichthys/15340/1996.04.29 in The Tree of Life Web Project, http://tolweb.org/
