FIGURE 2. Right M2 in Identifying tooth position of isolated teeth of sparassodonts (Mammalia: Metatheria) using geometric morphometrics

FIGURE 2. Right M2 of Acyon myctoderos (UATF-V-000926), a specimen close to the mean shape of the entire dataset, showing the morphological features of interest (A) and geometric morphometric landmarks and semilandmarks (B) used in this study. Anatomical abbreviations: alc, anterolabial cingulum (often extensive and continuous with preparaconular crista); cc, centrocrista; ef, ectoflexus; mco, metaconule; met, metacone; msl, metastylar lobe of stylar shelf; par, paracone; pco, paraconule; pmc, postmetacrista; ppc, preparacrista; pro, protocone; psl, parastylar lobe of stylar shelf; ss, stylar shelf; StA, stylar cusp A; StB, stylar cusp B. In B, squares represent fixed landmarks and circles represent semilandmarks.