FIGURE 7 in Taxonomic review of the slender mouse opossums of the "Parvidens" group from Brazil (Didelphimorphia: Didelphidae: Marmosops), with description of a new species

FIGURE 7. Occlusal view of upper molars M2–M4 of Marmosops species. A, M. marina sp. nov (UFMT 1427, Paratype ♁); B, M. parvidens (MPEG 40403 ♁); C, M. woodalli (MPEG 38667 ♁). Abbreviations: alci, anterolabial cingulum; prprcr, preprotocrista. Note the presence of a continuous shelf along the anterior margin of crown of the upper molars formed by the preprotocrista and the anterolabial cingulum in both M. marina and M. parvidens, which is narrow in the former (constriction indicated by arrows) and wide in the latter species. This condition is absent in M. woodalli. Scale bar 1.65 mm.