FIG. 6. In A, Philander opossum AMNH M-28329 (Didelphidae, Didelphimorphia), adult specimen, ventral view. In B, P. opossum AMNH M-266385, juvenile specimen, caudal cranium in oblique caudolateral view. Note relatively small size of transverse canal foramina in both specimens compared with exocranial carotid foramen (double foramina on right side in A, asterisk). Note also joint foramen for external continuation of ventral petrosal sinus and internal jugular vein. Key: astp, tympanic process of alisphenoid; bjs, basijugular sulcus; BO, basioccipital; BS, basisphenoid; cchf, caudal condylohypoglossal foramen; cspf, craniospinal

Published as part of MacPhee, Ross D.E., Gaillard, Charlène, Forasiepi, Analía M. & Sulser, R. Benjamin, 2023, Transverse Canal Foramen And Pericarotid Venous Network In Metatheria And Other Mammals, pp. 1-125 in Bulletin of the American Museum of Natural History 2023 (462) on page 36, DOI: 10.1206/0003-0090.462.1.1, http://zenodo.org/record/10831913