Related Overviews


More Like This

Show all results sharing this subject:

  • Zoology and Animal Sciences


Quick Reference

(class Mammalia, subclass Prototheria)

An extinct order of primitive mammals, known only from teeth found in Late Jurassic rocks. Their brains may have been larger than those of reptiles; probably their young were fed with milk; possibly they were homoiotherms; and perhaps they were insectivorous, arboreal, and nocturnal. They were about the size of, and must have resembled, shrews.

Subjects: Zoology and Animal Sciences.

Reference entries