Lethenia
Extinct genus of mackerel sharks
From Wikipedia, the free encyclopedia
Lethenia is an extinct genus of mackerel shark from the Eocene and Oligocene epochs.[1] It contains two species; the type species L. vanderbroecki is from the early Oligocene (Rupelian age) of Belgium,[2][3] while L. carranzaensis is from the late Eocene to early Oligocene of Chile.[1] It is considered closely related to Isurolamna and sometimes included within it. It differs in the morphology of its teeth, which are much more gracile than Isurolamna and has larger spacing between its crown and lateral cusps.[3]
| Lethenia Temporal range: | |
|---|---|
| |
| Holotype of Lethenia carranzaensis | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Chondrichthyes |
| Subclass: | Elasmobranchii |
| Division: | Selachii |
| Order: | Lamniformes |
| Family: | Lamnidae |
| Genus: | †Lethenia Baut & Génault, 1999 |
| Species | |
| |
