FIG. 4 in Caudal Cranium Of Thylacosmilus Atrox (Mammalia, Metatheria, Sparassodonta), A South American Predaceous Sabertooth

FIG. 4. Thylacosmilus atrox, paratype, FMNH P14344 (Río Santa María, Chiquimil, Catamarca, Argentina; Andalgalá Formation; Huayquerian, Late Miocene). Skull in A, dorsal and B, ventral views. Abbreviations: AL, alisphenoid; BO, basioccipital; C, upper canine; cc, carotid canal; cod, occipital condyle; cps, caudal paratympanic space; ctpsq, caudal tympanic process of squamosal; eam, external acoustic meatus; EX, exoccipital; fo, foramen ovale; for, foramen rotundum; FR, frontal; hfr, rostral hypoglossal foramen; ips, inferior petrosal sinus; lps, lateral paratympanic space (= epitympanic sinus); MX, maxilla; nc, nuchal crest; PA, parietal; rt, rami temporales; s, sagittal crest; sjf, secondary jugular foramen; sof, sphenoorbital fissure; SQ, squamosal; tl, temporal line; tpex, tympanic process of exoccipital. Arrow indicates direction to or position of features hidden by other structures.