Hybodus

Hybodus (from , 'crooked' and 'tooth') is an extinct genus of hybodont. Numerous species have been assigned to Hybodus spanning a large period of time, and it is currently considered a wastebasket taxon that is 'broadly polyphyletic' and requires reexamination. It has been suggested that Hybodus sensu stricto only consists of two species, the type species H. reticulatus and H. hauffianus, both known from the Early Jurassic of Europe, with H. obtusus from the Middle-Late Jurassic of Europe possibly also being a true species of Hybodus.

==Description== left|thumb|Skeletal reconstruction of an indeterminate species of Hybodus Hybodus species typically grew to about in length, with larger specimens of H. hauffianus reaching about . It possessed a streamlined body shape similar to modern sharks, with two similarly sized dorsal fins. As in other Hybodontiformes, dentinous fin spines were present on the dorsal fins of Hybodus, which in this genus exhibit a rib-like ornamentation located towards the tip of the spine, with rows of hooked denticles present on the posterior side. The males possessed claspers, specialized organs that directly insert sperm into the female, and which are still present in modern sharks.