Polypterus palmas
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Polypterus palmas |
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| Ayres , 1850 |
Polypterus palmas is a freshwater fish of the family of bichirs (Polypteridae) located in West Africa from Casamancefluss in Senegal on Saint Paul - and St. John River in Liberia until Cavally on the border between Liberia and the Ivory Coast found. Synonyms of the species are Polypterus buettikoferi Steindachner, 1891 , Polypterus lowei Boulenger, 1911 and Polypterus retropinnis lowei Boulenger, 1911 .
features
Polypterus palmas becomes a maximum of 35.3 cm long. The elongated body, covered with ganoid scales , is approximately round in cross-section in the front two thirds. The last third of the body is flattened laterally. The fish are colored gray on the back and show dark spots there that form a dense, checkerboard-like or net-like pattern. The drawing may fade with age. The sides of the body are a little lighter, the ventral side is monochrome and pale yellow. The upper jaw of the fish is slightly longer than the lower jaw and protrudes. The fleshy fin bases of the pectoral fins are darkly spotted in the rear section. The rafts also show dark spots. The ventral and anal fins are unspotted. Polypterus palmas has 55 to 58 scales in a row along the sideline , 33 to 39 scales in a row around the body and 25 to 32 scales in front of the first raft. The number of vertebrae is 56 to 59. The number of dorsal fleas is 7 to 9 and is therefore low in comparison with other Flössel pike. The anal fin is supported by 12 to 14 fin rays. The pectoral fins end well before the first raft.
literature
- Günther Sterba : The world's freshwater fish. 2nd Edition. Urania, Leipzig / Jena / Berlin 1990, ISBN 3-332-00109-4 .
Web links
- Polypterus palmas on Fishbase.org (English)
- Polypterus palmas inthe IUCN Red List of Threatened Species 2006.2. Posted by: Olaosebikan, BD & Lalèyè, P., 2010. Retrieved February 20, 2014.