Lycopteridae
| Lycopteridae | ||||||||||||
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Lycoptera |
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| Temporal occurrence | ||||||||||||
| Upper Jurassic to Lower Cretaceous | ||||||||||||
| Locations | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name of the order | ||||||||||||
| Lycopteriformes | ||||||||||||
| Chang & Chou , 1977 | ||||||||||||
| Scientific name of the family | ||||||||||||
| Lycopteridae | ||||||||||||
| Liu , Su , Huang & Chang , 1963 |
The Lycopteridae are an extinct family of small, often finger-long freshwater fish that were found in East Asian rivers and lakes from the Upper Jurassic to the Lower Cretaceous .
features
The fish had small, approximately round scales with numerous radial rays emanating from their central core. Their paired fins had only a few fin rays . The dorsal fin attachment was above or in front of the anal fin attachment. Its gill lid reached almost to the top of the skull. The number of Branchiostegal rays was high. The vertebrae consisted of a hypocenter with a rear fused pleurocenter, without a dorsal arch. A neural arch sat on the hypocenter. The largest otolith ("ear stone") was not in the sacculus, but in the lagena (two different equilibrium organs of the fish ), as was the case with the pike , the bald pike , the carp fish and the tetras .
Genera
- Lycoptera Müller, 1848
- Paralycoptera Chang & Chou, 1977
- Tonxinichthys Ma, 1980
- Yungkangichthys Chang & Chou, 1977
literature
- Arno Hermann Müller: Textbook of paleozoology. Volume III, Vertebrates, Part 1. Gustav Fischer Verlag, 1985.
- Joseph S. Nelson : Fishes of the World . John Wiley & Sons, 2006, ISBN 0-471-25031-7 .
