Mammalia - Rodentia - Octodontidae
Diagnosis. Medium-sized species of Metacaremys with slightly asynchronous closure of lingual flexids, the mesoflexid being more persistent. Bottom of metaflexid of m2 straight and wider than in M. primitiva comb. nov. Average APL of dp4m3 around 15 longer than in M. primitiva comb. nov. Average APL of m2 and m3 around 20 and 30 shorter, respectively, than in Metacaremys dimi sp. nov. Bottom of mesoflexus/fossette of the M1 slightly wider (mure anteroposteriorly longer) than in M. primitiva. Spur of the mesolophid absent in m12. LSID. urn:lsid:zoobank.org:act:EDE8E45C-E778-4646-854A08C5E09A52BB
Full reference: P. Piñero, D. H. Verzi, A. I. Olivares, C. I. Montalvo, R. L. Tomassini and A. Fernández Villoldo. 2021. Evolutionary pattern of Metacaremys gen. nov. (Rodentia, Octodontidae) and its biochronological implications for the late Miocene and early Pliocene of southern South America. Papers in Palaeontology 7(4):1859-1917
Belongs to Metacaremys according to P. Piñero et al. 2021
Sister taxa: Metacaremys dimi, Metacaremys primitiva
Type specimen: GHUNLPam 5039, a mandible (right mandibular fragment with dp4–m3). Its type locality is Estancia Don Mariano, which is in a Huayquerian terrestrial siltstone in the Cerro Azul Formation of Argentina.
Ecology: ground dwelling herbivore
Distribution:
• Huayquerian of Argentina (7 collections)
• Miocene of Argentina (1)
Total: 8 collections each including a single occurrence
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.