Parastrapotherium sp.

MacPhee, R. D. E., Del Pino, Santiago Hernández, Kramarz, Alejandro, Forasiepi, Analía M., Bond, Mariano & Sulser, R. Benjamin, 2021, Cranial Morphology And Phylogenetic Relationships Of Trigonostylops Wortmani, An Eocene South American Native Ungulate, Bulletin of the American Museum of Natural History 2021 (449), pp. 1-185 : 15

Parastrapotherium sp. AMNH VP-29575 is not extensively referenced in our descriptions because the cranium is considerably damaged and much of it is reconstructed. Almost the entire facial region is plaster, including the nasal aperture and the rostral end of the palate, as are the zygomatic arches and much of the basicranium. Known errors in reconstruction include absence of apertures (adituses) in the reconstructed retromandibular processes. These apertures are consistently present in better-preserved skulls of both Astrapotherium and Parastrapotherium ; absence does, however, occur in Astraponotus (p. 51, Interpreting Pneumatization).