Hegetotheria
Encyclopedia
Hegetotheria is a suborder of the extinct
mammal
ian order Notoungulata
and includes two families, Archaeohyracidae
and Hegetotheriidae
. Cifelli (1993) indicated that the suborder Typotheria
would be paraphyletic if it excluded members of Hegetotheria and he advocated inclusion of the hegetothere families in Typotheria.
Extinction
In biology and ecology, extinction is the end of an organism or of a group of organisms , normally a species. The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and recover may have been lost before this point...
mammal
Mammal
Mammals are members of a class of air-breathing vertebrate animals characterised by the possession of endothermy, hair, three middle ear bones, and mammary glands functional in mothers with young...
ian order Notoungulata
Notoungulata
Notoungulata is an extinct order of hoofed, sometimes heavy bodied mammalian ungulates which inhabited South America during the Paleocene to Pleistocene, living from approximately 57 Ma to 11,000 years ago.-Taxonomy:...
and includes two families, Archaeohyracidae
Archaeohyracidae
Archaeohyracidae is an extinct family comprising four genera of notoungulate mammals known from the Paleocene through the Oligocene of South America....
and Hegetotheriidae
Hegetotheriidae
Hegetotheriidae is an extinct family of notoungulate mammals known from the Eocene through the Pleistocene of South America...
. Cifelli (1993) indicated that the suborder Typotheria
Typotheria
Typotheria is a suborder of the extinct mammalian order Notoungulata and includes five families: Archaeopithecidae, Campanorcidae, Interatheriidae, Mesotheriidae, and Oldfieldthomasiidae...
would be paraphyletic if it excluded members of Hegetotheria and he advocated inclusion of the hegetothere families in Typotheria.