Chaetobranchopsis
| Chaetobranchopsis | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Chaetobranchopsis orbicularis , the type species of the genus. Drawing from Franz Steindachner's contributions to the knowledge of the chromids of the Amazon stream from 1875. |
||||||||||||
| Systematics | ||||||||||||
|
||||||||||||
| Scientific name | ||||||||||||
| Chaetobranchopsis | ||||||||||||
| Steindachner , 1875 |
Chaetobranchopsis is a genus of cichlids from tropical South America . The scientific genus name refers to the fine, long gill traps of the genus and the similarity with Chaetobranchus ( Gr .: "chaetos" = bristle + "branchiae" = gill + "opsis" = appearance). The two species of the genus occur in the Amazon basin and in the river basins of Río Paraná and Río Paraguay .
features
Chaetobranchopsis species are similar to the species of the genus Chaetobranchus , but remain a little smaller with a maximum length of 20 centimeters. They are even higher back and more flattened on the sides. Their tail stalk is shorter, the head profile steeper. They also have three fin spines in the anal fin, Chaetobranchus has 5 to 6 (mostly 4) fin spines there. As with Chaetobranchus , the gill rakes are long and slender in adaptation to the planktonic food. The teeth are also similar. The unpaired fins are strongly scaled. There are three to four uninterrupted rows of scales on the “cheeks”. Unusual for cichlids are rows of pore-bearing scales ( lateral line processes ) on the dorsal fin between the fin rays D1 and D2 and on the pelvic fins between the fin rays V1 and V2, and between V3 and V4. The scales on the sides of the body are relatively large.
- Scale formula : mLR 26-29.
Systematics
Together with the sister genus Chaetobranchus , Chaetobranchopsis forms the tribe Chaetobranchini within the New World cichlids ( Cichlinae ), which forms the sister group to the Geophagini .
species
- Chaetobranchopsis australis Eigenmann & Ward, 1907; Río Paraná and Río Paraguay river basins, possibly also in the Bolivian and adjacent Brazilian Amazon basins.
- Chaetobranchopsis orbicularis (Steindachner, 1875); in the middle and lower Amazon from the mouth of the Rio Negro to the island of Marajó in the mouth of the Amazon and in the Brazilian state of Amapá .
literature
- Horst Linke, Wolfgang Staek: American cichlids II, large cichlids. Tetra-Verlag, Bissendorf 1997, ISBN 3-89745-101-8 , pp. 84-86.
- Claus Schaefer: Chaetobranchopsis. In: Claus Schaefer, Torsten Schröer (Hrsg.): The large lexicon of aquaristics. Eugen Ulmer, Stuttgart 2004, ISBN 3-8001-7497-9 , p. 204.
Individual evidence
- ↑ Hernán López-Fernándeza, Kirk O. Winemillerc, & Rodney L. Honeycutt: Multilocus phylogeny and rapid radiations in Neotropical cichlid fishes (Perciformes: Cichlidae: Cichlinae). Molecular Phylogenetics and Evolution Volume 55, Issue 3, June 2010, Pages 1070-1086 doi : 10.1016 / j.ympev.2010.02.020
Web links
- Chaetobranchopsis on Fishbase.org (English)