Thayeria
| Thayeria | ||||||||||||
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Inclined swimmer ( Thayeria boehlkei ) |
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Thayeria | ||||||||||||
| Eigenmann , 1908 |
The genus Thayeria belongs to the real tetras (Characidae) and consists of four species. It occurs in the rivers of northern tropical South America , including in the Amazon , Rio Araguaia , Maroni , Rio Tapajós , Rio Tocantins and the Rio Guaporé . The genus was named after N. Thayer, who financed a large fishing expedition in South America from 1865 to 1866.
features
Thayeria species are 5 cm to 8 cm long. Characteristic is the inclined swimming style of the fish, with the head pointing towards the surface of the water and the significantly larger lower lobe of the caudal fin with a black band towards the bottom of the water. The body is elongated, strongly flattened on the sides and has a shiny silver color. Thayeria species have a more or less pronounced black stripe parallel to the incomplete side line . The section of the caudal fin base close to the body is scaled. An adipose fin is present. The anal fin is long and ends in a tip in the front third. The eyes are relatively large. There are two rows of teeth on the premaxillary , the maxillary is edentulous.
species
- Inclined swimmer ( Thayeria boehlkei Weitzman, 1957 )
- Thayeria ifati Géry, 1959
- Penguin tetra ( Thayeria obliqua Eigenmann, 1908 )
- Thayeria tapajonica White et al., 2017
literature
- Günther Sterba (Ed.), Gert Brückner: Encyclopedia of Aquaristics and Special Ichthyology. Neumann-Neudamm, Melsungen u. a. 1978, ISBN 3-7888-0252-9 .
- Helmut Stallknecht : Live-bearing toothcarps . Neumann Verlag, 1989, ISBN 3-7402-0055-3 .
- Axel Zarske: Thayeria. In: Claus Schaefer, Torsten Schröer (Hrsg.): The large lexicon of aquaristics. Eugen Ulmer, Stuttgart 2004, ISBN 3-8001-7497-9 , p. 933 f.
Web links
- Thayeria on Fishbase.org (English)