Heterotilapia
| Heterotilapia | ||||||||||||
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Heterotilapia buttikoferi |
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| Systematics | ||||||||||||
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| Scientific name of the tribe | ||||||||||||
| Heterotilapiini | ||||||||||||
| Dunz & Schliewen , 2013 | ||||||||||||
| Scientific name of the genus | ||||||||||||
| Heterotilapia | ||||||||||||
| Regan , 1920 |
Heterotilapia is a genus of cichlids that consists of two species and occurs in West Africa from Guinea-Bissau via Liberia ( Saint John River ) to the Ivory Coast . The genus originally had the rank of a sub-genus within the paraphyletic genus Tilapia and was raised to the genus rank in 2013 by Dunz and Schliewen.
features
The two species of the genus have a typical, moderately high-backed cichlid shape and reach lengths of 20 and 30 cm. Both show a pattern of dark and light, vertical stripes, with the 7 to 8 dark stripes wider than the light ones. The body is covered with round scales. 25 to 27 are in a central longitudinal row. Like all cichlids, heterotilapia has two sidelines . Further genus-typical features are the lower pharyngeal jaw consisting of the fused fifth ceratobranchial , which is as wide as it is long and has a front keel that is shorter or as long as the dentate area. The rear pharyngeal teeth are two or three-pointed, the middle broad and molar-shaped compared to the side teeth. The first gill arch carries 13 to 16 gill rakes. In both jaws, the teeth of the outer row of teeth are two-pointed, those of the inner row with small three-pointed teeth. The dorsal fin is supported by 14 to 16 hard rays and 6 to 8 unbranched soft rays. It shows a typical tilapia stain . The pelvic fins are pointed.
Heterotilapia are substrate spawners .
species
- Heterotilapia buttikoferi (Hubrecht, 1883) ( type species )
- Heterotilapia cessiana (Thys van den Audenaerde, 1968)
literature
- Andreas R. Dunz, Ulrich K. Schliewen: Molecular phylogeny and revised classification of the haplotilapiine cichlid fishes formerly referred to as “Tilapia”. Molecular Phylogenetics and Evolution, Doi: 10.1016 / j.ympev.2013.03.015
- Andreas R. Dunz: Revision of the substrate brooding “Tilapia” (Tilapia Smith, 1840 and related taxa), (Teleostei: Perciformes: Cichlidae). Dissertation to obtain a doctorate from the Faculty of Biology at the Ludwig Maximilians University of Munich, Munich, 2012, PDF
Web links
- Heterotilapia on Fishbase.org (English)