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 Archaeopterygidae indet. ( Fig. 28 A-D) DESCRIPTION Archaeopterygid birds are represented in Angeac-Charente by at least five teeth. One of these teeth is complete (ANG M-09, Fig. 28 A-C), whereas the others are broken at the base of the crown ( Fig. 28D ). The total height of the complete tooth is 3.2 mm . The crown height is only 1.2 mm and its basal length is 0.63 mm . The crown is strongly compressed labiolingually. There are no obvious enamel ornamentation and serrations are totally absent on the slight carinae. The apical quarter of the tooth is strongly distally recurved. Both the mesial and distal edges of the crown are sigmoid. By comparison with teeth of other theropods, we consider that the most convex side of the tooth corresponds to the labial surface ( Fig. 28 B-D). The specimens from Angeac-Charente are nearly identical to the single tooth collected at Cherves-de-Cognac, which in turn was assigned to an indeterminate archaeopterygid, based on the above characteristics ( Louchart & Pouech 2017 ). Angeac-Charente material is the youngest temporal occurrence of this extinct European family of early birds.