Nuurtherium, Velazco & Buczek & Novacek, 2017

Velazco, PaúL M., Buczek, Alexandra J. & Novacek, Michael J., 2017, Two new tritylodontids (Synapsida, Cynodontia, Mammaliamorpha) from the Upper Jurassic, southwestern Mongolia, American Museum Novitates 2017 (3874), pp. 1-36 : 15

Nuurtherium , gen. nov.

Figures 11–14

TYPE SPECIES: Nuurtherium baruunensis , sp. nov .

ETYMOLOGY: Nuur -, Mongolian, “lake,” fossils at Shar Teg were preserved in a cyclic sequence of fluvial and lake beds (see Ponomarenko et al., 2014).

AGE: As for the type and only species.

DIAGNOSIS: As for the type and only species.

Figures

FIGURE 11. The skull of Nuurtherium baruunensis PSS-MAE 632 (holotype; above) with accompanying line drawing (opposite page). Dark gray indicates matrix; light gray indicates the upper postcanines. Abbreviations: AP, angular process of dentary; Co, coronoid; CoP, coronoid process of dentary; crt, crypt for replacement

FIGURE 12. Upper right postcanine teeth of Nuurtherium baruunensis PSS-MAE 632 (holotype) in lingual views with accompanying line drawing. Gray indicates matrix; hatching indicates damage teeth surface. The identity of the buccal, medial, and lingual cusps are labeled on the line drawing. Abbreviations: B, buccal; M, medial; L, lingual.

FIGURE 13. Lower right postcanine teeth of Nuurtherium baruunensis PSS-MAE 632 (holotype) in (A) lingual view of the crowns and (B) lingual views of crowns and roots. Abbreviations: b, buccal; l, lingual.

FIGURE 14. Postcranial elements of Nuurtherium baruunensis PSS-MAE 632 (holotype; top) with accompanying line drawing of recognizable bones (bottom). Gray indicates matrix. Abbreviations: AR, anterior rib; As, left astragalus; CV, caudal vertebrae; Cl, right clavicle; DV, dorsal vertebrae; F, left femur; mc, metacarpal; mp, metapodial; pc, postcanine teeth; PR, posterior rib; U, left ulna; S, right scapula; T, right tibia. Scale bar = 50 mm.