Hyracotherium vasacciense (extinct)
Variant names:
 Eohippus vasacciensis
 Lophiotherium vasacciense
 Notharctus vasacciensis
 Orohippus vasacciensis
 Orotherium vasacciense

Latitudinal range: 42.3° to 43.2°
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Found in two samples

United States: Buck Spring Quarries (B-2 horizon) (Early Eocene), Deadman Butte (Early Eocene)

See also Hyracotherium, Hyracotherium grangeri, Hyracotherium index, Hyracotherium leporinum, Hyracotherium sandrae