Fig. 4

a Lower P/4 profiles of the holotype of Ectypodus tardus (dashed line), of the three specimens of Ectypodus childei from Abbey Wood (M26617, M15131, and M60309), and of the holotype of ?Ectypodus riansensis nov. sp. (dotted line, RI363). The profiles are aligned from the anterior-most point to the posterior-most point. b Profiles of the holotypes of ?Ectypodus riansensis nov. sp. (dotted line) and of Ectypodus tardus (Jepsen, PU 13265). The fragment of P/4 from Le Clot (UM/CLO33) is tentatively inserted between them. c P4/of ?Ectypodus riansensis nov. sp. from Rians (RI414): c1 labial view, c2 anterior view. d M1/of ?Ectypodus riansensis nov. sp. from Le Clot (UM/CLO43), occlusal view. e P4/of Ectypodus tardus (PU 17674): e1 labial view, e2 anterior view. f M/2 of ?Ectypodus riansensis nov. sp. from Le Clot (UM/CLO38): f1 occlusal view; f2 inferior view; f3 labial view; f4 lingual view, a little inclined; f5 anterior view; f6 posterior view. g M/1 of ?Ectypodus riansensis nov. sp. from Rians (RI347), occlusal view, slightly inclined. h M/1 of Ectypodus tardus (PU 13265), Holotype from the Willwood Formation, occlusal view, slightly inclined. i M/2 of Ectypodus tardus (PU 13265), holotype from the Willwood Formation, occlusal view