FIG. 12 in Cranial Morphology And Phylogenetic Relationships Of Trigonostylops Wortmani, An Eocene South American Native Ungulate

FIG. 12. Trigonostylops wortmani AMNH VP-28700, transverse segments through skull (on this and following two pages) in rostrocaudal sequence and at different scales. In A–C, note artificial entrance (asterisk) into right palatal diverticulum (filled with matrix in B), aditus of palatal diverticulum opening into nasal cavity, and palatal alate process (left side broken). In D–G, note frontal sinus in sagittal crest, matrix-filled extratympanic sinus occupying lateral sidewall of skull, and preparation artefacts (asterisks) occupying original positions of tympanic cavity and rostral carotid foramen. In H–L, note artificially widened aditus of extratympanic sinus, reconstructed position of tympanic membrane (double-Published as part of 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, pp. 1-185 in Bulletin of the American Museum of Natural History 2021 (449) on page 51, DOI: 10.1206/0003-0090.449.1.1, http://zenodo.org/record/541502