Mammalia, Linnaeus, 1758

Allain, Ronan, Vullo, Romain, Rozada, Lee, Anquetin, Jérémy, Bourgeais, Renaud, Goedert, Jean, Lasseron, Maxime, Martin, Jeremy E., Pérez-García, Adán, Fabrègues, Claire Peyre De, Royo-Torres, Rafael, Augier, Dominique & Bailly, Gilles, 2022, Vertebrate paleobiodiversity of the Early Cretaceous (Berriasian) Angeac-Charente Lagerstätte (southwestern France): implications for continental faunal turnover at the J / K boundary, Geodiversitas 44 (25), pp. 683-752 : 724

Mammalia indet.

( Fig. 32C, D )

DESCRIPTION

A tooth from the mammal material of Angeac-Charente, ANG M-34 ( Fig. 32C, D ), preserves a high, main central cusp, one accessory cusp and one root. Given the strong development of the accessory cusp and the inclination of the main cusp apex, this side of the tooth, and thus the only preserved root, is considered to be distal. The section of the tooth breakage shows that a second, mesial root was present. A symmetrical and similar accessory cusp was maybe present on the mesial side. Such morphology is reminiscent to that of the posterior premolariforms of the Middle Jurassic eutriconodont Amphilestes and other “ Amphilestidae ” (Kielan-Jaworowska et al. 2004). However, without the second half of the tooth, it is difficult to reach a conclusion, as it could also correspond to other, more derived mammals. Without any more diagnostic characters, this specimen is thus cautiously identified as Mammalia indet.

Figures

FIG. 32. — Mammal teeth from Angeac-Charente: A, B, premolariform or molariform tooth of Gobiconodon? sp. (ANG M-21) in occlusal (A) and labial (B) views; C, D, premolariform tooth of Mammalia indet. (ANG M-34) in lingual (C) and labial (D) views; E, F, left lower molar of Triconodon sp. (ANG M-02) in lingual (E) and occlusal (F) views; G-I, left upper molar of Thereuodon cf. taraktes (ANG M-23) in labial (G), lingual (H) and occlusal (I) views. Scale bar: 500 µm.