Query: Prehistoric mammals with only two limbs, excluding Miocene animals.
Domain: animals
Relevant documents:
Squalodontidae
Parasqualodon
Blunt-snouted dolphin
Agorophius
Hoplocetus
Mirocetus
Mycteriacetus
Waipatia
Tagicetus
Eurhinodelphinidae
Otekaikea
Orcinus citoniensis
Hemisyntrachelus
Ankylorhiza
Xenorophidae
Squalodelphinidae
Simocetus