Figure 4 in Revision of the cranial anatomy and phylogenetic relationships of the Eocene minute boas Messelophis variatus and Messelophis ermannorum (Serpentes, Booidea)

Figure 4. Dorsal view of left prefrontal (A), right postorbital (B), and right ectopterygoid of Messelophis variatus (AMNH FARB 30650). D, dorsolateral view of left preorbital region of Boa constrictor based on HRXCT data. E, dorsal view of right postorbital region of Ungaliophis continentalis based on HRXCT data. F, dorsal view of the right palatomaxillary arch of Ungaliophis continentalis (three-dimensional cutaway view based on HRXCT data). For Messelophis panels, scale bars equal 1 mm, the others are not to scale. Abbreviations: ec, ectopterygoid; fr, frontal; la, dorsal lappet; ld, lacrimal duct; lf, lateral foot process; ll, lateral lamina of prefrontal; ll-dl, undifferentiated lateral and dorsal lamina of prefrontal; lp, anterolateral prong; mfp, medial foot process; mp, anteromedial prong; mx, maxilla; n, nasal; ol, outer orbital lobe; p, parietal; pfr, prefrontal; pl, palatine; po, postorbital; pt, pterygoid. ; Published as part of Scanferla, Agustín, Smith, Krister T. & Schaal, Stephan F. K., 2016, Revision of the cranial anatomy and phylogenetic relationships of the Eocene minute boas Messelophis variatus and Messelophis ermannorum (Serpentes, Booidea), pp. 182-206 in Zoological Journal of the Linnean Society 176 (1) on page 186, DOI:10.1111/zoj.12300, http://zenodo.org/record/5458789