Figure 9 in Phylogenetic relationships among sloths (Mammalia, Xenarthra, Tardigrada): the craniodental evidence

Figure 9. Skull and lower jaw of Nothrotheriops and Pronothrotherium. A, skull and lower jaw of Nothrotheriops shown in left lateral view. B, skull of Pronothrotherium shown in ventral view. Characters and states illustrated: 2(4), 4/3 dental formula; 3(0), toothrow horizontal in lateral view; 37(2), mandible of moderate depth,> 20%, £ 22.5% of MML; 56(1), condylar surface nearly horizontal in lateral view; 68(2), symphyseal spout elongate; 86(0), snout narrow; 132(1), pterygoid/vomer contact; 137(2), large pterygoid sinus present; 189(1), posterior edge of occipital condyles at or anterior to posterior edge of foramen magnum; 199(1), ethmoid covered by vomer in roof of nasopharynx; 200(1), vomer with elongate, asymmetrical keel extending posteriorly into nasopharynx; 201(1), vomer with large exposure in roof of nasopharynx, covering presphenoid and much of basisphenoid. Drawing A modified from Stock (1925); drawing B based upon specimen of Pronothrotherium typicum (FMNH P14467).