FIG. 4 in Peligrotherium tropicalis (Mammalia, Dryolestida) from the early Paleocene of Patagonia, a survival from a Mesozoic Gondwanan radiation

FIG. 4. — Homologies in upper molars of Mesungulatidae and Peligrotheriidae, and comparison with Periptychidae cheekteeth; A, left M3 of Mesungulatum houssayi Bonaparte & Soria, 1984; B, left M2-3 of Peligrotherium tropicalis Bonaparte, Van Halen & Kramartz, 1993; C, left P3-M3 of Periptychus rhabodon Cope, 1882. Abbreviations: ac, anterior cingulum; asc, anterior stylar cusp; ca, anterior crista; cp, posterior crista; hyo, hypocone; mo, metacone; pa, paracone; pc, posterior cingulum; psc, posterior stylar cusp; po, protocone; sty, stylocone. Scale bars: A, B, 5 mm; C, 10 mm.