FIG. 6. Posterior braincase of Dromiciops gliroides (A, UWBM 78641), Marmosa murina (B, AMNH 266418), and Echymipera kalubu (C, AMNH 190977). Alternative states for characters 30 and 31 (see main text for descriptions of these characters and character states) are illustrated as follows: Dromiciops 30(1), 31(0); Marmosa 30(1), 31(1); Echymipera 30(0), 31(-). Note that the incompletely mineralized lambdoid sesamoids (see Character 89) have fallen away in this juvenile specimen of Echymipera (the mature morphology is illustrated in fig. 11), fully exposing the parietal-supraoccipital suture. Abbreviations: exo, exoccipital; ip, interparietal; mas, mastoid; mf, mastoid fenestra; par, parietal; so, supraocciptal; sq, squamosal; ssf, subsquamosal foramen. Specimens are not drawn to the same scale.

Published as part of Beck, Robin M.D., Voss, Robert S. & Jansa, Sharon A., 2022, Craniodental Morphology And Phylogeny Of Marsupials, pp. 1-353 in Bulletin of the American Museum of Natural History 2022 (457) on page 53, DOI: 10.1206/0003-0090.457.1.1, http://zenodo.org/record/6971356