†family Protoptychidae Tullberg 1899 (rodent)

Mammalia - Rodentia - Protoptychidae

Parent taxon: Protrogomorpha according to A. E. Wood 1958

See also Hay 1902 and McKenna and Bell 1997

Sister taxa: Akmaiomys, Floresomys, Ischyromyoidea, Jimomys, Laredomyidae, Marfilomys, Meliakrouniomys, Pseudoparamys, Sciuravidae, Texomys

Subtaxa: Protoptychus

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Ecology: ground dwelling herbivore

Distribution:

• Eocene of United States (4: Utah, Wyoming collections)

Total: 4 collections each including a single occurrence

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