Fig. 2 in Reconstructed masticatory biomechanics of Peligrotherium tropicalis, a non-therian mammal from the Paleocene of Argentina

Fig. 2. Reconstructed skull and hemimandibles of meridiolestidan mammal Peligrotherium tropicalis Bonaparte, Van Valen, and Kramarz, 1993(digitized from models produced by Paéz-Arango 2008). A. Skull and mandibles articulated into closed gape position and showing the attachments of several major muscle groups. B. Right-inferior oblique view of lower left hemimandible and skull in open gape position. Here the left side of the skull is assumed to be the working-side (WS), and the right side the balancing-side (BS); see Tables 1 and 2. Colored tubes are the lines-of-action of their respective muscle category; matching colored surfaces represent corresponding estimated origin and insertion areas; and black spheres show the locations of corresponding origin or insertion centroids. Abbreviations: DM-W, deep masseter working-side; MP-W/B, medial pterygoid working-side/ balancing-side; PT-W, posterior temporalis muscle category working-side; SM-W, superficial masseter working-side.