It may even be a member of a known genus or species, which would make the name Ultrasaurus a junior synonym as well.

This genus is currently the only known genus in its family.

This leaves Dyslocosaurus as the only known genus capable of producing the footprints.

As of 2011, it is the only known genus of the family Bashuchelyidae.

New species of known genera are also credited to him.

It is a relatively small family, containing only eight known genera and 32 species.

Therefore, Nyctiphruretus is currently the only known genus of its order.

These cannot be assigned to a known genus, but probably are closest to Anas.

There are 22 known families of megasecopterans, with about 35 known genera.

The Tripteroceratdae includes five known genera, as briefly described.