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Bones referred to Ibirania parva, A. Middle caudal vertebra (MPMA 08-0060-07) referred to I. parva. B. Views of partial right ulna (LPP-PV-0202) of the I. parva holotype. According to Navarro et al. (2022).

Herbivorous dinosaur found in the Al-khoudh area. This dinosaur is similar to the Zalmoxes and Rhabdodon dinosaurs. The skeleton in the Bait Al Baranda Museum was assembled from bones borrowed from several museums.

Dinosaur Bones

MRF 319, a partial oviraptorosaurian skeleton referred to Anzu wyliei. (A) Skeletal reconstruction in left lateral view, with preserved bones in gray and bones represented in other Anzu specimens in white (hatching indicates heavily reconstructed portions of the ilia of CM 78001). Middle-posterior (ninth?) cervical vertebra in (B) anterior, (C) left lateral, and (D) dorsal views. Posterior (11th?) cervical vertebra in (E) anterior, (F) left lateral, and (G) dorsal views. Posterior (12th?) cervical vertebra in (H) anterior, (I) left lateral, and (J) dorsal views. Anteroposteriorly crushed left radius in lateral (K) and anterior (L) views. Mediolaterally crushed left ulna in lateral (M) and anterior (N) views. (O) Partial left scapulocoracoid in lateral view. Dorsal rib in anterior (P) and posterior (Q) views. Abbreviations: acr, acromial process; cr, cervical rib; dip, distal processes; pat, pathology; pf, pneumatic fossa. Scale bars = 50 cm in A; 1 cm in B–Q.

MRF 319, a partial oviraptorosaurian skeleton referred to Anzu wyliei. Skeletal reconstruction in left lateral view, with preserved bones in gray and bones represented in other Anzu specimens in white (hatching indicates heavily reconstructed portions of the ilia. Scale bar = 50 cm (19.7 in)

Osteohistology of UALVP 59606, metatarsal IV of Citipes elegans. Overview of histological thin section of UALVP 59606 in plane-polarized (A) and cross-polarized (B) light, showing locations of close-up images. Detail (C) of cortex showing predominantly primary fibrolamellar bone with longitudinal-reticular vascularity, endosteal layer, and cyclical growth marks (arrows), under plane-polarized light. Close-up (D) of well developed endosteal layer on the medullary cavity, showing sec- ondary excavation by simple vascular canals, under cross-polarized light. Close-up (E) of tightly packed cyclical growth marks (arrows) near the periosteal surface of the cortex, under plane-polarized light. Close-up (F) of periosteal surface of cortex, showing avascular parallel-fibered bone indicating an incipient external fundamental system (double ended arrow) with three LAGs (arrows). Abbreviations: efs, incipient external fundamental system; el, endosteal lamellae; hb, Haversian bone; pfb, parallel-fibered bone; radv, radial simple vascular canal; so, secondary osteon.

Main evolutionary steps proposed for the morphofunctional and postural changes of the sauropod pedes. (A) Sauropod body mass through time (in metric tons) based on the sauropod body mass estimations of (41) (NB: data lacking for the second half of the Upper Cretaceous so illustrated here faded, in continuity with the data recorded in the Cretaceous). Schematic outlines of selected large specimens illustrated in the curve, including (from left to right) P. engelhardti, Vulcanodon karibaensis, R. brownei, G. brancai, Cedarosaurus weiskopfae, and Notocolossus gonzalezparejasi. (B) Projected evolutionary changes occurring in the sauropod pes associated with trend in body mass, including 1, skeletal and functional digitigrade pedal posture among basal non-sauropod sauropodomorphs with an incipient soft tissue pad (ISP) (see figs. S34 and S35); 2 and 3, expansion of a well-developed soft tissue pad beneath the elevated pedal bones (SP), resulting in a functionally plantigrade pes + retention of skeletal posture within a range of digitigrady; 4, retention of a soft tissue pad and yet undetermined trend toward more elevated bones; 5, conservation of the neomorphic soft tissue pad within all lineages. Selected examples of well-preserved non-sauropod sauropodomorph and sauropod pedal tracks illustrated above the trends, including (from left to right) Evazoum siriguii; Pseudotetrasauropus bipedoida, Eosauropus isp., Lavinipes cheminii; Kalosauropus pollex, Liujianpus shunan, Polyonyx gomesi; Parabrontopodus mcintoshi; Brontopodus birdi; Titanopodus mendozensis; and unnamed Asian sauropod track. Source of adapted drawing and notes are listed in table S9 and data S2.

Main evolutionary steps proposed for the morphofunctional and postural changes of the sauropod pedes. (A) Sauropod body mass through time (in metric tons) based on the sauropod body mass estimations of (41) (NB: data lacking for the second half of the Upper Cretaceous so illustrated here faded, in continuity with the data recorded in the Cretaceous). Schematic outlines of selected large specimens illustrated in the curve, including (from left to right) P. engelhardti, Vulcanodon karibaensis, R. brownei, G. brancai, Cedarosaurus weiskopfae, and Notocolossus gonzalezparejasi. (B) Projected evolutionary changes occurring in the sauropod pes associated with trend in body mass, including 1, skeletal and functional digitigrade pedal posture among basal non-sauropod sauropodomorphs with an incipient soft tissue pad (ISP) (see figs. S34 and S35); 2 and 3, expansion of a well-developed soft tissue pad beneath the elevated pedal bones (SP), resulting in a functionally plantigrade pes + retention of skeletal posture within a range of digitigrady; 4, retention of a soft tissue pad and yet undetermined trend toward more elevated bones; 5, conservation of the neomorphic soft tissue pad within all lineages. Selected examples of well-preserved non-sauropod sauropodomorph and sauropod pedal tracks illustrated above the trends, including (from left to right) Evazoum siriguii; Pseudotetrasauropus bipedoida, Eosauropus isp., Lavinipes cheminii; Kalosauropus pollex, Liujianpus shunan, Polyonyx gomesi; Parabrontopodus mcintoshi; Brontopodus birdi; Titanopodus mendozensis; and unnamed Asian sauropod track. Source of adapted drawing and notes are listed in table S9 and data S2.

Remake of the original picture of the Drzewica Formation. Terrestrial environment of the Pliensbachian-Toarcian boundary of Fennoscandinavia Inland environment of the Bornholm Coast, nearby the German realm of the Ciechocinek Formation. Includes Ciechocinek Formation (Lower Toarcian, Bones) and Drzwica Formation (Latest Pliensbachian, Footprints) Fauna Sorthat Formation environment, fluvial influenced mainland with Cheirolepidaceae and Bennetitales as dominant flora Dinosaurs are based on material found on various locations of Northern Germany, and Footprints of the underliying Drzewica Formation at the Holy Cross Mountains, connected with Bornholm at the time. Dinosaur Species appeared: Megalosauripus isp. Large Footprints (+65 cm) found on the Drzewica Formation. There is a dorsal vertebrae on the German Margin of the Ciechocinek Formation assigend to Megalosauria (Huene, 1966). Gravisauria spp. representing the Grimmen Sauropod reported on 2014, as a taxon related with Tazoudasaurus. Barapasaurus-like footprints are know from the Drzewica Formation. Coelophysoidea spp. based on coeval Anchisauripus tracks from the Holy Cross Mountains. Basal Ornithischan, related to Eocursor, based on a crouching trace (Gerard Dariusz Gierlinski, Martin G. Lockley, Grzegorz Niedźwiedzki:2009). Massospondylidae spp. based on Otozum-like tracks.

Bones and remains of prehistoric animals A massive marine lizard and apex predator, growing to length of 14 m (46 ft).[1]

Reconstruction of Tuebingosaurus maierfritzorum gen. et sp. nov. as a quadruped dinosaur, using the outline of Riojasaurus as a base ‒ next to the silhouette of Friedrich von Huene. The drawing of the bones is based on and modified from the original illustrations of specimen “GPIT IV” in von Huene (1932, pl. 38) that have been replicated in the literature. The right fibula is marked in grey as it was found nearby with similar measurements to the left fibula and has been assumed to be part of the same individual.

Holotype fossils of Glacialisaurus (PR 1823); metatarsals, tibia, fibula, ankle bones

Alvarezsauroid theropod Linhenykus monodactylus Xu, Sullivan, Pittman, Choiniere, Hone, Upchurch, Tan, Xiao, Tan, and Han, 2011a, Bayan Mandahu (“Gate Locality”), Late Cretaceous (Campanian), holo−type (IVPP V17608). Skeletal silhouette showing preserved bones (missing portions shown in grey).

Skeleton of Yamaceratops dorngobiensis (MPC-D 100/553) in right dorsolateral view. (A) Photograph; (B) Interpretive drawing. Bones are bounded by solid lines and colored beige; the matrix is gray. Shaded areas represent the broken surface of bones. Abbreviations: cd, caudal vertebrae; dr, dorsal ribs; dv, dorsal vertebrae; f, femur; fi, fibula; h, humerus; L, bone on the left side; p, isolated parietal; pp, pedal phalanges; R, bone on the right side; ra, radius; sk, skull; sv, sacral vertebrae; ti, tibia; u, ulna; il, ilium; is, ischium.

Right dentary in (A), medial; (B), dorsal; and (C) lateral views. Dashed black lines represent approximate contours of the missing areas. Dashed red lines indicate the distinctive banding pattern in the opal used to estimate the extent of the missing area. (D–F) Three-dimensional renders of the posterior dentary fragment in (D) lingual view showing erupted (blue) and developing germ teeth (pink); (E) Same as (D) but with dentary removed; (F) dorsal (occlusal) view of tooth row. (G-J) Three-dimensional render of the best-preserved tooth in (G) mesial, (H) lingual, (I) distal, and (J) labial views. (K) MicroCT scan of the posterior dentary fragment in axial view showing preservation of cancellous bone. Abbreviations: cab, cancellous bone; cr, tooth crown. Photo credit: Phil Bell.

Figure 1, 1a. Outer and oral aspects of the imperfect dentary bone of Sarcolestes Leedsi, from the Oxford Clay of Peterborough. 2/3 nat size. s = symphysis. Figure 1b. A single tooth of the former. 3/1 nat size. Figure 2, 2a. Outer aspect and quadratic cavity of the hinder region of the same jaw. 2/3 nat size. Figure 3. A single tooth of Priodontognathus Phillipsi, 3/1 nat size, shown for purposes of comparison. Specimen in the Woodwardian Museum, Cambridge.