Fig. 36 in A Review Of Dromaeosaurid Systematics And Paravian Phylogeny

Fig. 36. Select skull remains of Deinonychus antirrhopus. A, right maxilla (YPM 5232) in lateral view; B, left jugal (YPM 5210) in medial view; C, right lacrimal in lateral view; D, left astragalocalcaneum (YPM 5226) in anterior view. Important features of Deinonychus antirrhopus include: 1, a maxillary fenestra located dorsal to the level of the promaxillary fenestra; 2, lobate anteriormost process of jugal beneath antorbital fenestra; 3, a very prominent lacrimal boss; 4, a large and wide calcaneum.