| Parahelicampodus Temporal range: Wuchiapingian, | |
|---|---|
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Chondrichthyes |
| Subclass: | Holocephali |
| Order: | † Eugeneodontida |
| Family: | † Edestidae |
| Genus: | † Parahelicampodus Nielsen, 1952 |
| Type species | |
| †Parahelicampodus sparcki | |
Parahelicampodus is an extinct genus of shark-like eugenodont fish. Fossils of Parahelicampodus have been uncovered in Eastern Greenland, which date to the Late Permian period. [1]
The Eugeneodontida, sometimes also called Eugeneodontiformes, is an extinct and poorly known order of cartilaginous fishes. They possessed "tooth-whorls" on the symphysis of either the lower or both jaws and pectoral fins supported by long radials. They probably lacked pelvic fins and anal fins. The palatoquadrate was either fused to the skull or reduced. Now determined to be within the Holocephali, their closest living relatives are chimaeras. The eugeneodonts are named after paleontologist Eugene S. Richardson, Jr. The group first appeared in the fossil record during the late Mississippian (Serpukhovian). The youngest eugeneodonts are known from the Early Triassic. The geologically youngest fossils of the group are known from the Sulphur Mountain Formation, Vardebukta Formation and Wordie Creek Formation (Greenland).
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