Fig. 4

a–d Gastornis sp., Louvois, 22 L, right carpometacarpus, ventral (a), dorsal (b), cranial (c) and caudal (d) views. e, f Gastornis parisiensis, Cernay, MNHN CR 10537, right carpometacarpus, ventral (e) and dorsal (f) views. g, h Gastornis giganteus, Bighorn Basin, Wyoming, USA, LACM 6882/31732, right carpometacarpus, ventral view (g), left carpometacarpus, ventral view (h). i Gastornis sp., Louvois, 23 L, fragment of synsacrum, ventral view. j Gastornis sp. Louvois, 33 L, fragment of cervical vertebra, dorsal view. k–w Gastornis sp., Louvois, pedal phalanges. k, l 2 L, right Ph. 2 D IV, large form, immature, dorsal (k) and plantar (l) views. m–o 8 L, right Ph. 2 D IV, large form, dorsal (m), plantar (n) and proximal (o) views. p–r 5 L, right Ph. 2 D IV, small form, dorsal (p), plantar (q) and proximal (r) views. s–u 18 L, left Ph. 3 D IV, large form, dorsal (s), plantar (t) and proximal (u) views. v–w 9 L, right Ph. 4 D IV, large form, dorsal (v) and plantar (w) views