Figure 1 in Evolution of molar shape in didelphid marsupials (Marsupialia: Didelphidae): analysis of the influence of ecological factors and phylogenetic legacy

Figure 1. Occlusal views of the third upper (A, B) and lower (C, D) didelphid molars. A and C, molars of Didelphis albiventris showing the landmarks and semilandmarks used. B and D, didelphid molars illustrating features of crown morphology discussed in the text. Squares, landmarks; circles, semilandmarks. See text for a detailed description of landmarks. Abbreviations: ac, anterior cingulum (light grey shading); cc, centrocrista; co, cristid obliqua; ect, ectoflexus; Ent, entoconid; ento, entocristid; Hyp, hypoconid; Hypd, hypoconulid; Me, metacone; Med, metaconid; meta, metastylar corner (grey shading); Pa, paracone; Pacr, paracristid; Pad, paraconid; para, parastylar corner (dark grey shading); postcd, postcristid; prePa, preparacrista; Pr, protocone; Prcr, protocristid; Prd, protoconid; prePr, preprotocrista; posMe, metacrista; posPr, postprotocrista; StA, stylar cusp A; StB, stylar cusp B; StC, stylar cusp C; StD, stylar cusp D; StE, stylar cusp E; Ta: talonid; Tri: trigonid.