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Protosteiromys medianus Ameghino 1903 (porcupine)

Osteichthyes - Rodentia - Erethizontidae

PaleoDB taxon number: 336984

Alternative combination: Eosteiromys medianus

Belongs to Protosteiromys according to A. E. Wood and B. Patterson 1959

Sister taxon: Protosteiromys asmodeophilus

Type specimen: MACN A52-111, a tooth (right M1 or M2)

Ecology: arboreal herbivore