Leptolepidae

Leptolepis dubia

• Worldwide

The Leptolepidae are an extinct family of small, often only long finger, herring -like, probably of marine bony fishes that occurred worldwide from the Lower Jurassic to Lower Cretaceous.

Features

Leptolepidae species were the first genuine bony fish whose spine was already well ossified. The eddy had only a central perforation, but was always less in the course of evolution. The caudal fin was outwardly homocerk, the end of the spine, however, was bent upward and corresponded to the woman fish ( Elops ). Your bone cells were similar to those of most of the herring -like ( Clupeiformes ). The sensory channels correspond to those of Palaeoniscidae. On the nose there was a transverse sensory channel.

Leptolepidae species had a thin Ganoinschicht on the deck bones of the skull. The thin, be like tiles overlapping cycloid scales had a fine Ganoinschicht on its outer surface. The paired parietal bone had a short contact area. The lower jaw consisted of articular and dentary. The upper jaw edge is formed by the maxilla and premaxilla small.

Genera

• Aethalion
• Leptolepis
• Pachythrissops
• Tharsis