Hybodontidae is an extinct

family Family (from la, familia) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its ...

shark Sharks are a group of elasmobranch fish characterized by a cartilaginous skeleton, five to seven gill slits on the sides of the head, and pectoral fins that are not fused to the head. Modern sharks are classified within the clade Selachimo ...

s that first appeared in the Mississippian subperiod of the

Carboniferous The Carboniferous ( ) is a geologic period and system of the Paleozoic that spans 60 million years from the end of the Devonian Period million years ago ( Mya), to the beginning of the Permian Period, million years ago. The name ''Carbonifero ...

and disappeared at the end of the

Late Cretaceous The Late Cretaceous (100.5–66 Ma) is the younger of two epochs into which the Cretaceous Period is divided in the geologic time scale. Rock strata from this epoch form the Upper Cretaceous Series. The Cretaceous is named after ''creta'', the ...

.the Paleobiology Database Hybodontidae entry
accessed on 8/24/09

Genera

* ''†

Asteracanthus ''Asteracanthus'' (from el, ἀστήρ , 'star' and el, ἄκανθα , 'spine') is an extinct genus of hybodontiform, known from the Middle Jurassic (Bathonian) to the Early Cretaceous (Valanginian). Description Astercanthus was among the ...

'' * ''† Dicrenodus'' * ''† Egertonodus'' * ''†

Hybodus ''Hybodus'' (from el, ύβος , 'crooked' and el, ὀδούς 'tooth') is an extinct genus of hybodont, a group of shark-like elasmobranchs that lived from the Late Devonian to the end of the Cretaceous. Species closely related to the type sp ...

'' * ''†

Meristodonoides ''Meristodonoides'' is an extinct genus of cartilaginous fish. The type species is ''M. rajkovichi'', which was originally a species in the genus ''Hybodus ''Hybodus'' (from el, ύβος , 'crooked' and el, ὀδούς 'tooth') is an extinct ...

'' * ''† Planohybodus'' * ''† Priohybodus'' * ''† Sphenonchus'' *''† Tribodus''

References

{{Chondrichthyes-stub Hybodontiformes Carboniferous sharks Permian sharks Triassic sharks Jurassic sharks Cretaceous sharks Shark families Prehistoric cartilaginous fish families