Isthmoheros tuyrense
| Isthmoheros tuyrense | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name of the genus | ||||||||||||
| Isthmoheros | ||||||||||||
| Říčan & Novák , 2016 | ||||||||||||
| Scientific name of the species | ||||||||||||
| Isthmoheros tuyrense | ||||||||||||
| ( Meek & Hildebrand , 1913) |
Isthmoheros tuyrense is a freshwater fish from the family of cichlids , which in Panama in the basins of Río Tuira and Río Bayano occurs.
features
Isthmoheros tuyrense is high back and reaches a length of over 25 cm. The fish have a gray basic color and, as juvenile fish, have six dark transverse bands that are reduced to a longitudinal row of dark spots in adult specimens. The head, body and pectoral fins are covered with lines of small black dots.
The meristic (countable) features that distinguish the species from other amphilophine cichlids (related to Amphilophus ) include body size (250 mm SL vs. smaller than 150 mm SL), few anal spines (6 - 7 vs. more than 8), 14 trunk vertebrae (vs. 13) and 32 scales along the sideline (vs. less than 30, exception Hypsophrys ). The teeth of Isthmoheros tuyrense are conical and single-pointed; the tip is flattened labiolingually .
Way of life
Isthmoheros tuyrense has only a small distribution area and lives in rivers with cloudy, often clay-brown water and slow flow rates and in Lake Bayano . The species feeds on detrivorous and herbivorous food, i.e. on decomposing organic matter and plants, in rivers mainly on thread algae and on parts of land plants that have fallen into the water. Aquatic plants are largely absent from the habitat. Only in Bayanosee there are large Hydrilla backlogs.
Systematics
The species was described in 1913 by the American ichthyologists Seth Eugene Meek and Samuel Frederick Hildebrand under the name Cichlasoma tuyrense and named after the Río Tuira of the Terra typica . Later the species was assigned to the genus Vieja . In 2016 the genus Isthmoheros was introduced, with Isthmoheros tuyrense as the only species. The genus name is made up of Isthmo (for isthmus of Panama ) and Heros (genus of cichlids). Isthmoheros is the sister genus of Talamancaheros .
literature
- Horst Linke, Wolfgang Staek: American cichlids II, large cichlids. Tetra-Verlag, Bissendorf 1997, ISBN 3-89745-101-8 , page 404.
- Říčan, O., Piálek, L., Dragová, K. & Novák, J. (2016): Diversity and evolution of the Middle American cichlid fishes (Teleostei: Cichlidae) with revised classification . Vertebrate Zoology, 66 (1): 1-102.
Web links
- Isthmoheros tuyrense on Fishbase.org (English)