Orthacodontidae
Extinct family of sharks
From Wikipedia, the free encyclopedia
Orthacodontidae (also spelled Orthacodidae[1]) is an extinct family of sharks. It is disputed as to whether it belongs to the modern shark order Hexanchiformes,[2] or the extinct order Synechodontiformes.[3] It contains three genera. Some other authors included it in Lamniformes.[4] More recent studies have generally favored its placement in the Hexanchiformes.[1]
| Orthacodontidae Temporal range: | |
|---|---|
| |
| Head of Archaeogracilidens macer | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Chondrichthyes |
| Subclass: | Elasmobranchii |
| Family: | †Orthacodontidae Glikman, 1957 |
| Genera | |
