Whales

The evolution of whales has been a mystery. How did a large, big-brained mammal -- air-breathing, warm-blooded, giving birth to live young -- come to live entirely in water, when mammals evolved on land? The discovery of many fos...

Sirenians (Sirenia)

1. Metaxytherium 2. Protosiren 3. Hydrodamalis 4. Prorastomus  5. Pezosiren

Entelodonts

Entelodonts (properly Entelodontidae) have generally been regarded as suiforms (close kin to pigs and peccaries) but some recent analyses have found the sampled members of the group to be members of the hippo + cetacea...

Hippopotamuses, Choeropsis & Hexaprotodons
1. Kenyapotamus 2. Siamotherium 3. Archaeopotamus 4. Anthracotherium 5. Merycopotamus
Until 1909, naturalists grouped hippos with pigs, based on molar patterns. Several lines of evidence, f...

Rodents (Rodentia)

The single largest group of mammals is the Rodentia. Most non-flying mammals are rodents: there are about 1,500 living rodent species (out of about 4,000 living mammals overall). Most people are familiar with mice, ra...

Genus † Mammuthus

A mammoth is any species of the extinct genus Mammuthus, proboscideans commonly equipped with long, curved tusks and, in northern species, a covering of long hair. They lived from the Pliocene epoch (from around...

Family † Elephantidae

Genus † Stegotetrabelodon

Genus † Sinomastodon

Sinomastodon ("Chinese mastodont") is an extinct gomphothere genus (of order Proboscidea), from the Late Miocene to the Early Pleistocene deposits of south-east Asia (China, Japan, and Indonesia). It is not t...

Elephantimorpha
                   Family † Mammutidae
                                        Genus † Zygolophodon

 Elephants,mammoths,mastodons and kin (Proboscidea)
The elephants and their extinct relatives,including mammoths, mastodons, gomphotheres, deinotheres, barytheres,and others, make up the Proboscidea.
The two living species of elephants (El...

Elasmotheriini

The rhinocerotoids of the early Eocene and subsequently the Hyracodontidae and Amynodontidae show no sign of dermal armour or horns. The oldest known genus of rhinocerotids, or true rhinoceroses, is Teletaceras from t...

Rhinocerotidae

True rhinos are members of the family Rhinocerotidae. Compared to other perissodactyl families, true rhinos got off to a late start and do not appear in the fossil record until about 40 million years ago; most of the othe...