Fig. 4: Body plan of Natovenator polydontus (MPC-D 102/114, holotype) and dorsal rib morphology of various diving birds and terrestrial taxa.
From: A non-avian dinosaur with a streamlined body exhibits potential adaptations for swimming
a Dorsal series of Natovenator in ventral view. b Reconstruction of dorsal vertebrae and ribs of Natovenator in left lateral view. c Skeletal reconstruction of Natovenator with missing parts in dark grey. d–i Dorsal rib morphology of Natovenator (d), diving birds (e–i), common ostrich (j), and Shri devi, a likely terrestrial dromaeosaurid from the Baruungoyot Formation (k) in ventral view (not to scale). l Reconstruction of the fourth dorsal vertebra with corresponding ribs in anterior view. d2 second dorsal vertebra, r2 second dorsal rib, r3 third dorsal rib, r4 fourth dorsal rib.
