Mammalia - Theriiformes - Stylinodontidae

Synonyms: Calamodon arcamaenus Cope 1874, Calamodon novomehicanus Cope 1874, Calamodon simplex Cope 1874, Conicodon simplex Cope 1874, Dryptodon crassus Marsh 1876, Ectoganus gliriformis lobdelli Simpson 1929, Ectoganus lobdelli Simpson 1929, Ectoganus novomehicanus Cope 1874, Ectoganus simplex Cope 1874, Lampadophorus lobdelli Simpson 1929, Psittacotherium lobdelli Simpson 1929

Belongs to Ectoganus according to R. M. Schoch 1985

Sister taxa: Ectoganus bighornensis, Ectoganus copei

Subtaxa: Ectoganus gliriformis gliriformis

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Type specimens:

• Ectoganus gliriformis: Its type locality is Arroyo Blanco (Cope), which is in a Wasatchian terrestrial horizon in the San Jose Formation of New Mexico
• Calamodon arcamaenus:
• Calamodon novomehicanus:
• Dryptodon crassus:
• Ectoganus lobdelli: Its type locality is Bear Creek, which is in a Clarkforkian terrestrial horizon in the Polecat Bench Formation of Montana.
• Ectoganus simplex:

Ecology: ground dwelling herbivore

Average measurements (in mm): m1 11.7 x 12.0