| Diadiaphorus
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| D. majusculus skull. Collected from Santa Cruz, Patagonia, Argentina. | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Mammalia |
| Order: | †Litopterna |
| Family: | †Proterotheriidae |
| Subfamily: | †Proterotheriinae |
| Genus: | †Diadiaphorus Ameghino, 1887 |
| Type species | |
| †Diadiaphorus majusculus Ameghino, 1887 | |
| Species | |
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| Synonyms | |
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Genus synonymy
D. majusculus
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Diadiaphorus is an extinct genus of litoptern mammal from the MioceneofArgentina (Ituzaingó, Pinturas, Chiquimil and Santa Cruz Formations) and Bolivia (Nazareno Formation), South America.
Diadiaphorus closely resembled a horse, but was only around 1.2 metres (3.9 ft) in body length with a weight 70 kilograms (150 lb), similar to a modern sheep.[1]
It had three toes, only one of which touched the ground. This toe had a large hoof; the two outer toes were rudimentary, much like those of early horses such as Merychippus. Unlike horses, however, Diadiaphorus lacked fused limb bones. Its skull was short and had a relatively large brain cavity. Judging from its low molars, Diadiaphorus ate soft vegetation, such as leaves.[2]
| Diadiaphorus |
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