Biology:Dianema
Dianema is a small genus of is a genus of freshwater ray-finned fish belonging to the family Callichthyidae and the subfamily Callichthyinae, the armored catfishes. Dianema was first formally recorded as a genus name in a meeting abtract in 1871 but no formally described species was named until Edward Drinker Cope described the type species, Dianema longibarbis, by monotypy the following year. The genus name is derived from the Greek di, meaning "two", and nema, meaning "filament", an allusion to the two long barbels on the maxilla.[1] The two species of Dianema share approximately the same distribution, and are found in the Amazon River and lower courses of its tributaries.[2] Dianema species have the habit of swimming midwater, as opposed to the bottom as in most callichthyids.[2]
Species
Dianema contains the following valid species:[3]
- Dianema longibarbis Cope, 1872 (Porthole catfish)
- Dianema urostriatum (A. Miranda-Ribeiro, 1912) (Flagtail catfish)
References
- ↑ Christopher Scharpf (18 October 2025). "Family CALLICHTHYIDAE Bonaparte 1835 (Armored Catfishes)". The ETYFish Project Fish Name Etymology Database. Christopher Scharpf. https://etyfish.org/callichthyidae/.
- ↑ 2.0 2.1 Reis, Roberto E. (1996-04-29). "Dianema Cope 1872". Tree of Life Web Project. http://www.tolweb.org/Dianema/15337. Retrieved 2007-07-12.
- ↑ Eschmeyer, William N.; Fricke, Ron; van der Laan, Richard, eds. "Species in the genus Dianema". California Academy of Sciences. http://researcharchive.calacademy.org/research/ichthyology/catalog/fishcatget.asp?tbl=species&genus=Dianema.
Wikidata ☰ Q139521 entry
 |  |
