densalle

Densalle is a genus of extinct cartilaginous fishes belonging to the order Heterodontiformes, commonly known as bullhead sharks. Fossils of Densalle have been found in marine deposits dating back to the Cretaceous period. These ancient sharks are characterized by their distinctive dentition, which includes a combination of sharp, piercing teeth in the front of the jaw and flattened, crushing teeth in the back. This dental specialization suggests a diet that likely consisted of hard-shelled invertebrates, such as mollusks and crustaceans, in addition to fish.

The genus Densalle is known from fragmented fossil remains, primarily isolated teeth and some jaw elements. Due to the scarcity of complete specimens, the exact external morphology and size of Densalle are not fully understood. However, based on its phylogenetic placement within Heterodontiformes, it is presumed to have possessed a body shape typical of modern bullhead sharks, likely characterized by a stout body, a flattened head, and dorsal spines preceding its two dorsal fins. The geographical distribution of Densalle fossils indicates a presence in various marine environments during the Cretaceous. Further research on more complete fossil discoveries may offer greater insights into the evolutionary history and paleoecology of this ancient shark genus.