Isisaurus is known from much better remains than most titanosaurs.

The other is the original type species: O. velox, at first known from very limited remains.

It is known from incomplete remains, but probably reached about 17 meters (56 ft) in length.

It currently contains three species, known from somewhat fragmentary remains.

Cetiosaurus was known from slightly better, but still scrappy remains.

We know from skeletal remains associated with early man that our ancestors were hunters.

At least two other species are known from rarer remains.

It is known only from skeletal remains found on the island of Hispaniola.

The group is known only from scanty and fragmentary remains.

It is one of the few therocephalians known from postcranial remains.