Holoclemensia sp.

Davis, Brian M. & Cifelli, Richard L., 2011, Reappraisal of the tribosphenidan mammals from the Trinity Group (Aptian-Albian) of Texas and Oklahoma, Acta Palaeontologica Polonica 56 (3), pp. 441-462 : 453

Holoclemensia sp.

Referred material.— SMP−SMU 61726, Lmx.

Description.— SMP−SMU 61726 ( AP: 2.06, ANW: 1.43, POW: 0.90; Fig. 7F ) is a complete but heavily fractured lower molar. It is referable to Holoclemensia in trigonid proportions—the trigonid is wide and mesiodistally compressed, the paraconid was much shorter than the metaconid (broken) and positioned somewhat buccally, and a distal metacristid is absent. However, the talonid is elongate and curled, in a manner similar to Kermackia . The cristid obliqua meets the trigonid more lingually than in specimens of H. texana , and the entoconid is relatively much larger (subequal to or larger than the hypoconid). This specimen is too poorly preserved to be of any other taxonomic use.

Stratigraphic and geographic range.—Butler Farm, upper Antlers Formation (Aptian–Albian), north−central Texas, USA.

Figures

Fig. 7. The basal eutherian Holoclemensia texana Slaughter, 1968b from the Early Cretaceous of Oklahoma and Texas (A–E). A. SMP−SMU 62399, Lp5 in occlusal (A1) and lingual (A2) views. B. SMP−SMU 61727, Lm1 in occlusal (B1) and lingual (B2) views. C. PM 887, Rm1 in occlusal (C1) and lingual (C2) views. D. PM 1005, Rm2 in occlusal (D1) and lingual (D2) views. E. OMNH 62412, Rm3 in occlusal (E1) and lingual (E2) views. F. SMP−SMU 61726, Lmx referred to Holoclemensia sp. in occlusal (F1) and lingual (F2) views.