Vertebrate paleobiodiversity of the Early Cretaceous (Berriasian) Angeac-Charente Lagerstätte (southwestern France): implications for continental faunal turnover at the J / K boundary Author Allain, Ronan Author Vullo, Romain Author Rozada, Lee Author Anquetin, Jérémy Author Bourgeais, Renaud Author Goedert, Jean Author Lasseron, Maxime Author Martin, Jeremy E. Author Pérez-García, Adán Author Fabrègues, Claire Peyre De Author Royo-Torres, Rafael Author Augier, Dominique Author Bailly, Gilles text Geodiversitas 2022 2022-07-21 44 25 683 752 journal article 107849 10.5252/geodiversitas2022v44a25 d0184974-bea3-4f97-a2f8-98887ec4f87e 1638-9395 6902033 urn:lsid:zoobank.org:pub:EA12DCB7-A5BE-4763-B805-25087EBD726D Pinheirodontidae indet. ( Fig. 33 A-H, M-P) DESCRIPTION Most of the multituberculate teeth discovered in Angeac-Charente can be referred to the family Pinheirodontidae , but it has not been possible to refer them to any existing genera. The material figured here includes a left p4 (ANG M-72), a left P1 (ANG M-03), a right P2 (ANG M-06), a left P3 (ANG M-22), a left?m2 (ANG M-105) and a left M2 (ANG M-32) ( Fig. 33 A-H, M-P). The most mesial part of the blade-like p4 (ANG M-72) is missing ( Fig. 33A ). It possesses at least six serrations, and no basal labial cusp, a diagnostic feature of Pinheirodon ( Hahn & Hahn 1999 ; Kielan-Jaworowska et al. 2004). Nevertheless, the Angeac-Charente specimen has a straight, vertical, distal margin ( Fig. 33B ), while the latter is strongly convex just above the root in Pinheirodon . FIG. 33. — Multituberculate mammal teeth from Angeac-Charente: A , B , left p4 of Pinheirodontidae indet. (ANG M-72) in lingual ( A ) and labial ( B ) views; C , D , left P1 of Pinheirodontidae indet. (ANG M-03) in occlusal ( C ) and distolingual ( D ) views; E , F , right P2 of Pinheirodontidae indet. (ANG M-06) in occlusal ( E ) and lingual ( F ) views; G , H , left P3 of Pinheirodontidae indet. (ANG M-22) in occlusal ( G ) and lingual ( H ) views; I , J , left?P4 of Sunnyodon sp. (ANG M-04) in occlusal ( I ) and labial ( J ) views; K , L , left?P5 of Multituberculata indet. (ANG M-106) in mesio-occlusal ( K ) and occluso-labial ( L ) views; M , N , left?m2 of Pinheirodontidae indet. (ANG M- 105) in occlusal ( M ) and labial ( N ) views; O , P , right M2 of Pinheirodontidae indet. (ANG M-32) in occlusal ( O ) and lingual ( P ) views. Scale bar: A, B, 1 mm; C, D, 750 µm; E-P, 500 µm. The?m2 (ANG M-105) has a well-developed central basin. Labial cusps are missing and there are only two lingual cusps as in Bernardodon ( Fig. 33N ), whereas there are three in Pinheirodon ( Hahn & Hahn 1999 ) . Nevertheless, the tooth shape is considerably longer than wide, and precludes assigning it to Bernardodon ( Fig. 33M ). The M2 (ANG M-32) shows a prominent anterolingual shelf ( Fig. 33O ), like that observed in the molars of Bernarodon and Pinheirodon (Kielan-Jaworowska et al. 2004) . As in the latter two genera there are three lingual cusps, but ANG M-32 differs from other pinheirodontids in lacking the labial cusps ( Fig. 33P ; Hahn & Hahn 1999 ). The anterior upper premolars P1 (ANG M-03), P2 (ANG M-06) and P3 (ANG M-22) have 3-4 ribbed cusps arranged in two rows like in other “plagiaulacidans” ( Fig. 33 C-H; Kielan-Jaworowska et al. 2004). They are not very diagnostic and only tentatively assigned here to Pinheirodontidae , based on their similarities with the pinheirodontid teeth described by Hahn & Hahn (1999 : fig. 58).