Figure 7. Skull and lower jaw of Hapalops. A, skull and lower jaw shown in left lateral view. B, skull shown in ventral view. Characters and states illustrated: 3(2), C1 & c1 slightly depressed relative to molariforms in lateral view; 6(1), elongate diastema present; 10(1), orthodentine forms thin layer, thinner than outer layer of cementum; 17(2), occlusal surface of molariforms with strong transverse crests; 27(1), M4 curved anteriorly in lateral view; 31(2), M1 rectangular in cross-section; 56(2), condylar surface inclined posteroventrally in lateral view; 65(2), mandibular symphysis with concave profile in lateral view; 68(1), symphyseal spout of moderate length; 73(0), symphyseal spout horizontal in lateral view; 76(1), mandible with weak fossa posterior to c1; 106(1), buccinator fossa weakly developed; 122(4), palate short, uniformly wide; 140(0), orbital portion of lacrimal larger than facial exposure; 143(1), lacrimal eminence present; 147(1), jugal and lacrimal overlap facial portion of maxilla in lateral view; 169(1), zygomatic process of squamosal horizontal or inclined slightly dorsad in lateral view; 184(1), nuchal crest overhangs occiput posteriorly; 195(0), occipital condyles elongated anteroposteriorly in ventral view; E21(1), anteroventral process of entotympanic present. [Modified from Scott (1903–4).]

Published as part of Gaudin, Timothy J., 2004, Phylogenetic relationships among sloths (Mammalia, Xenarthra, Tardigrada): the craniodental evidence, pp. 255-305 in Zoological Journal of the Linnean Society 140 (2) on page 271, DOI: 10.1111/j.1096-3642.2003.00100.x, http://zenodo.org/record/5439575