Paracestracion
Paracestracion is an extinct genus of heterodontiform sharks from Early Jurassic to Early Cretaceous-aged rocks of England, France, Germany and Luxembourg. The genus was first described in 1911 by Ernst Hermann Friedrich von Koken in Karl Alfred von Zittel.
| Paracestracion | |
|---|---|
| Holotype specimen of Paracestracion danieli | |
| Paracestracion falcifer fossil from Solnhofen, Germany | |
| Scientific classification | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Chondrichthyes |
| Subclass: | Elasmobranchii |
| Subdivision: | Selachimorpha |
| Order: | Heterodontiformes |
| Family: | †Paracestracionidae |
| Genus: | †Paracestracion Koken in Zittel, 1911 |
| Type species | |
| †Paracestracion falcifer Koken, 1911 vide Wagner, 1858 | |
| Other species | |
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| Synonyms | |
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The genus contains several Late Jurassic species known from well preserved full body remains, which show that it differs from the living bullhead sharks in the placement of the pelvic girdle and fins, as well as by having a shorter skull.
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