Sigournea
| Sigournea | |
|---|---|
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Superclass: | Tetrapoda |
| Class: | incertae sedis |
| Genus: | †Sigournea Bolt and Lombard, 2006 |
| Type species | |
| †Sigournea multidentata Bolt and Lombard, 2006
| |
Sigournea is a
Tetrapoda based on the presence of bone surfaces covered in pits and ridges, a single row of dentary teeth, a jaw joint that faces upward, and an open groove for a lateral line along the outer surface of the jaw, and on the absence of teeth on the prearticular bone or enlarged fangs on the coronoids. Sigournea differs from other stem tetrapods in having several holes within a depression called the exomeckelian fenestra on the inner surface of the jaw.[1]
The closest relatives of Sigournea within Tetrapoda are unknown. Bolt and Lombard did not include it in a
baphetoid tetrapod Spathicephalus from Scotland and Nova Scotia based on the presence of small, closely packed marginal teeth in both taxa. However, their proposition was tentative because they did not include Sigournea in their phylogenetic analysis.[3]
