*** Welcome to piglix ***

Hystricognath

Hystricognathi
Temporal range: Late Eocene–Recent
Capromys pilorides.jpg
Capromys pilorides
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Rodentia
Suborder: Hystricomorpha
Infraorder: Hystricognathi
Tullberg, 1899
Families

Hystricidae
Bathyergoididae
Bathyergidae
Myophiomyidae
Diamantomyidae
Phiomyidae
Kenyamyidae
Petromuridae
Thryonomyidae
Erethizontidae
Chinchillidae
Neoepiblemidae
Dinomyidae
Cephalomyidae
Eocardiidae
Caviidae
Dasyproctidae
Cuniculidae
Ctenomyidae
Octodontidae
Abrocomidae
Echimyidae
Myocastoridae
Capromyidae
Heptaxodontidae


Hystricidae
Bathyergoididae
Bathyergidae
Myophiomyidae
Diamantomyidae
Phiomyidae
Kenyamyidae
Petromuridae
Thryonomyidae
Erethizontidae
Chinchillidae
Neoepiblemidae
Dinomyidae
Cephalomyidae
Eocardiidae
Caviidae
Dasyproctidae
Cuniculidae
Ctenomyidae
Octodontidae
Abrocomidae
Echimyidae
Myocastoridae
Capromyidae
Heptaxodontidae

The Hystricognathi are an infraorder of rodents, distinguished from other rodents by the bone structure of their skulls. The masseter medialis (a jaw muscle) passes partially through the infraorbital foramen and connects to the bone on the opposite side. This, together with their lack of an infraorbital plate and the relative size of the infraorbital foramen, distinguishes hystricognaths from other rodent groups.


...
Wikipedia

...