Mammalia - Sirenia - Dugongidae

Alternative combinations: Halitherium antiquusm, Ischyrosaurus antiquus, Ischyrotherium antiquum, Ischyrotherium antiquus, Manatus antiquus, Trichechus antiquus

Full reference: J. Leidy. 1856. Notice of some remains of extinct vertebrated animals. Proceedings of the Academy of Natural Sciences of Philadelphia 163-165

Belongs to Halitherium according to O. P. Hay 1930

Sister taxa: Halitherium schinzii, Manatus renggeri

Type specimen: Its type locality is between Moreau and Grand Rivers (USGS), which is in a Maastrichtian terrestrial horizon in the Lance Formation of South Dakota

Distribution: there are no occurrences of Halitherium antiquum in the database

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Specimen images are retrieved through the ePANDDA API.