Fig. 5

Morphological evolution of third metacarpals of European Rhinocerotidae during the Oligocene-Miocene transition (MP25-MN4). Scale bar = 10 cm. The values of the gracility index (GI) are given only when the calculation was possible. The drawings are from DB's personal observations (specimens housed in the Naturhistorisches Museum Basel, NMB, and the Naturhistorisches Museum der Burgergemeinde Bern, NMBE) and from the literature. 1-2: Molassitherium delemontense from (1) Bumbach (MP25, NMBE-D1567) and (2) Puy de Vaur (Late Oligocene; Michel 1983, pl. X.a1); 3-4: Ronzotherium romani from (3) Bumbach (MP25, NMB-Um7) and (4) Le Garouillas (MP25; GI: 0.192; De Bonis and Brunet 1995, fig.4b); 5: Molassitherium albigense from Saint-André (MP26, NMB-Mar354b; GI: 0.174); 6: “Diaceratherium” massiliae from Saint-André (MP26; GI: 0.305; Ménouret and Guérin 2009, figs. 13b, 14a, tab. S8); 7: Ronzotherium romani from Rickenbach (MP29; Mennecart et al. 2012b, fig.4); 8-9: Diaceratherium lamilloquense from (8) Rickenbach (MP29; Mennecart et al. 2012b, fig.4) and (9) La Milloque (MP29; GI: 0.281; Brunet 1979, fig. 16d; Michel 1983, fig. 14.b1, pl. Xc1); 10: Diaceratherium aff. lemanense from Thézels (MP30; GI: 0.281; Michel 1983, pl. Xb); 11: Mesaceratherium paulhiacense from Paulhiac (MN1; GI: 0.192; De Bonis 1973, fig. 38.1a); 12-13: Pleuroceros pleuroceros from Paulhiac (MN1), (12) GI: 0.272 female (De Bonis 1973, fig. 43.1a) and (13) GI: 0.279 male (De Bonis 1973, fig. 44.1); 14: Diaceratherium lemanense from Gannat (MN1, NMB-Gn39; GI: 0.291); 15-17: Diaceratherium asphaltense from (15-16) Pyrimont (MN1, UCBL-213011 and UCBL-213012; GI: 0.331, respectively) and (17) Saulcet (MN1, MHNG-v4988; GI: 0.327); 18: Protaceratherium minutum from Budenheim (MN2; GI: 0.200; Roman 1924, fig. 13, pl. IV.4); 19: Diaceratherium lemanense from Laugnac (MN2; GI: 0.286; De Bonis 1973, fig. 30.1a); 20: Diaceratherium asphaltense from Laugnac (MN2, NMB-Cg194; GI: 0.343); 21-22: Diaceratherium aurelianense from Artenay (MN4), (21) NMB-So3182; GI: 0.431 and (22) GI: 0.374 (Cerdeño 1993, tab. III, pl. III.4); 23: Lartetotherium sansaniense from Coca (MN6; GI: 0.228; Cerdeño 1986, pl. 2.3a); 24: Plesiaceratherium mirallesi from Pellecahus (MN4; GI: 0241; Antoine et al. 2000, fig.1.1, tab. 1); 25: Brachypotherium brachypus from Chevilly (MN4; GI: 0378; Cerdeño 1993, tab. 5, tab. VII, pl. VI.5); 26: Prosantorhinus douvillei from Chevilly (MN4; GI: 0413; Cerdeño 1996, tab. 5, pl. 19.7)