Galerie d'images
Toutes les images de la base — taxons, formations et intervalles géologiques.
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4,186 image(s)
Lusotitan atalaiensis. Photographs of right humerus (proximal half) in (A) anterior (slightly oblique as a result of mounted position), (B) medial, (C) proximal, (D) lateral, and (E) posterior views. Abbreviations: dtp, deltopectoral crest; hh, humeral head. Scale bar = 200 mm.
Dinosaur National Monument is a United States National Monument located on the southeast flank of the Uinta Mountains on the border between Colorado and Utah at the confluence of the Green and Yampa Rivers. Although most of the monument area is in Moffat County, Colorado, the Dinosaur Quarry is located in Utah just to the north of the town of Jensen, Utah. The nearest communities are Jensen, Utah, and Dinosaur, Colorado. The park contains over 800 paleontological sites and has fossils of dinosaurs including Allosaurus, Deinonychus, Abydosaurus (a nearly complete skull, lower jaws and first four neck vertebrae of the specimen DINO 16488 found here at the base of the Mussentuchit Member of the Cedar Mountain Formation is the holotype for the description) and various long-neck, long-tail sauropods. It was declared a National Monument on October 4, 1915. The rock layer enclosing the fossils is a sandstone and conglomerate bed of alluvial or river bed origin known as the Morrison Formation from the Jurassic Period some 150 million years old. The dinosaurs and other ancient animals were carried by the river system which eventually entombed their remains in Utah. The pile of sediments were later buried and lithified into solid rock. The layers of rock were later uplifted and tilted to their present angle by the mountain building forces that formed the Uintas during the Laramide orogeny. The relentless forces of erosion exposed the layers at the surface to be found by paleontologists. The dinosaur fossil beds (bone beds) were discovered in 1909 by Earl Douglass, a paleontologist working and collecting for the Carnegie Museum of Natural History. He and his crews excavated thousands of fossils and shipped them back to the museum in Pittsburgh, Pennsylvania for study and display. President Woodrow Wilson proclaimed the dinosaur beds as Dinosaur National Monument in 1915. The monument boundaries were expanded in 1938 from the original 80-acre (320,000 m2) tract surrounding the dinosaur quarry in Utah, to its present extent of over 200,000 acres (800 km²) in Utah and Colorado, encompassing the spectacular river canyons of the Green and Yampa. Though lesser-known than the fossil beds, the petroglyphs in Dinosaur National Monument are another treasure the monument holds. Due to problems with vandals, many of the sites are not listed on area maps. The "Wall of Bones" located within the Dinosaur Quarry building in the park consists of a steeply tilted (67° from horizontal) rock layer which contains hundreds of dinosaur fossils. The enclosing rock has been chipped away to reveal the fossil bones intact for public viewing. In July 2006, the Quarry Visitor Center was closed due to structural problems that since 1957 had plagued the building because it was built on unstable clay. The decision was made to build a new facility elsewhere in the monument to house the visitor center and administrative functions, making it easier to resolve the structural problems of the quarry building while still retaining a portion of the historic Mission 66 era exhibit hall. It was announced in April 2009 that Dinosaur National Monument would receive $13.1 million to refurbish and reopen the gallery as part of the Obama administration's $750 billion stimulus plan. The Park Service successfully rebuilt the Quarry Exhibit Hall, supporting its weight on 70-foot steel micropile columns that extend to the bedrock below the unstable clay. The Dinosaur Quarry was reopened in Fall 2011. en.wikipedia.org/wiki/Dinosaur_National_Monument en.wikipedia.org/wiki/Wikipedia:Text_of_Creative_Commons_...
Middle cervical vertebra of Vouivria damparisensis (MNHN.F.1934.6 DAM 6). (A) Left lateral view, (B) anterior view, (C) right lateral view; (D) posterior view. Abbreviations: cpol, centropostzygapophyseal lamina; di, diapophysis; cprl, centroprezygapophyseal lamina; espol, expanded spinopostzygapophyseal lamina; no, notch; ns, notch; pa, parapophysis; pn, pneumatic foramen; pocdf, postzygapophyseal centrodiapophyseal fossa; podl, postzygodiapophyseal lamina; poz, postzygapophysis; prz, prezygapophysis; ri, ridge; sdf, spinodiapophyseal fossa; spol, spinopostzygapophyseal lamina; sprl, spinoprezygapophyseal lamina. Scale bar equals 10 cm.
Recreación de Aragosaurus, Lourinhasaurus y Galvesaurus, los tres macronarios hallados en la Península Ibérica
Liaoningotitan sinensis, mount, Liaoning Palaeontological Museum
fossil Europasaurus, Aathal Dinosaur Museum.
Pantydraco caducus, a sauropodomorph from the Late Triassic or Early Jurassic of England, after Yates, 2003, pencil drawing, digital coloring
Dentary of the hadrosauroid dinosaur Fylax thyrakolasus gen. et sp. nov. (IPS-36338, holotype) from the uppermost Maastrichtian Fontllonga-R locality; in posterior (A1), medial (A2), dorsal (A4), anterior (A5), lateral (A6), and ventral (A7) views. A detailed lingual view of the tooth crowns appears in A3.
Right hind limb of the sauropodomorph dinosaur Musankwa sanyatiensis gen. et sp. nov. (NHMZ 2521) from the Pebbly Arkose Formation (Norian, Upper Triassic) of Spurwing Island, Zimbabwe. A. Right femur in posterior (A1), lateral (A2), anterior (A3), medial (A4), proximal (A5), and distal (A6) views. B. Right tibia with conjoined astragalus in anterior (B1), lateral (B2), posterior (B3), medial (B4), and proximal (B5) views.
Life restoration of Tawa hallae created by Jeffrey Martz (Petrified Forest National Park, AZ)
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.
Xixia, southern Henan Province. Complete indexed photo collection at WorldHistoryPics.com.
Skull of the new basal sauropodomorph Leyesaurus marayensis (PVSJ 706). Photograph of the skull (A) and interpretative drawing (B) in lateral view. Dark grey color represents matrix and light grey color represents foraminae. Abbreviations: a, angular; aoF, antorbital fenestra; aoFo; antorbital fossa; Apmx, ascending process of the maxilla; d, dentary; f, frontal; itF, infratemporal fenestra; j, jugal; l, lacrimal; laoFo; lacrimal antorbital fossa; mF, mandibular fenestra; mx, maxilla; n, nasal; O, orbit; p, parietal; pf, prefrontal; pm, premaxilla; po, postorbital; rug, platform-like rugosities; q, quadrate; qj, quadratejugal; Rmx, ridge of the ascending process of the maxilla; sa, surangular; snf, subnarial foramen. Scale bar equals 1cm.
Holotype fossils of Glacialisaurus (PR 1823); metatarsals, tibia, fibula, ankle bones
Materials of Brasilotitan nemophagus (MPM 125R), A. Right dentary in dorsal and ventral views. B. Posterior cervical vertebrae in ventrolateral view. C. Sequence of sacral vertebrae in left lateral and dorsal views (Machado et al., 2013).
Reconstruction of Bravasaurus arreirosorum a titanosaur dinosaur from the Late Cretaceous of Argentina
Left maxilla of the silesaurid Agnosphitys cromhallensis from the Late Triassic (Rhaetian) of England.
Fossil of Sthenarosaurus, an extinct reptile - Took the picture at Museum of Paleontology, Tuebingen
Shri rapax 3D skeletal reconstruction by Alex Pritchard of Dinosaur Skeletons.
Basal cryptoclidid plesiosaur restoration.
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.
Photo: mounted skeleton of Qantassaurus intrepidus at the Australian Museum, Sydney.
Uncovered skeleton of Brachauchenius sp. VL from the late Barremian Formacio´n Paja of Loma La Cabrera, Villa de Leyva area, in dorsal view. The far posterior part (ischia, tail) and the right hind limb are not preserved.
Skeletal reconstruction of Isasicursor, with known remains shown in white and reconstructed in grey
Life restoration of the Triassic ichthyosaur Callawayia neoscapularis. Three specimens of this ichthyosaur are known, the holotype, ROM 41993, and two referred specimens, TMP 94.380.11 and 94.382.2. The skull is primarily based on ROM 41993, cross-checked against TMP 94.380.11 and TMP 94.382.2. The vertebral column is based primarily on TMP 94.382.2 as it is the most complete of these specimens, while the ribs were based on ROM 41993. The forelimbs were mainly based on those of ROM 41993, with TMP 94.380.11 used to determine their breadth. The hindlimbs were based on TMP 94.380.11, especially the more complete right hindlimb. ROM 41993 was cross-scaled with TMP 94.380.11 by the dimensions of the forelimb epipodials, which produced similar vertebral dimensions. The two TMP specimens were cross-scaled based on femoral length, also producing similar vertebral dimensions. Nicholls & Manabe (2001) stated that no wedge-shaped caudal centra supporting a tailbend were found and that there was no evidence of a bend being present, though considered that they might have existed in the gap in the preserved caudals. Since various other Triassic ichthyosaurs have since been found to have tail bends, one was illustrated here. A modest downturn of roughly 15° was illustrated, comparable to that in Guanlingsaurus, and the location of the bend within the gap in the preserved vertebrae matches well with the location of the bend in Guizhouichthyosaurus. References McGowan, C. (1994). "A new species of Shastasaurus (Reptilia: Ichthyosauria) from the Triassic of British Columbia: The most complete exemplar of the genus". Journal of Vertebrate Paleontology 14 (2): 168–179. DOI:10.1080/02724634.1994.10011550. Nicholls, E. L.; Manabe, M. (2001). "A new genus of ichthyosaur from the Late Triassic Pardonet Formation of British Columbia: Bridging the Triassic-Jurassic gap". Canadian Journal of Earth Sciences 38 (6): 983–1002. Ji, C.; Jiang, D.Y.; Hao, W.; Sun, Y. (2011). "True tailbend occurred in the Late Triassic: Evidence from ichthyosaur skeletons of South China". Acta Scientiarum Naturalium Universitatis Pekinensis 47 (2): 309–314. Shang, Q. H.; Li, C. (2009). "On the occurrence of the ichthyosaur Shastasaurus in the Guanling biota (Late Triassic), Guizhou, China". Vertebrata PalAsiatica 47 (3): 178–193.
Reconstructed skull of Jaxartosaurus aralensis Riabinin, 1937. Only a posterior portion of the skull, as well as a surangular is known, with the rest of the skull being based mostly upon File:Aralosaurus skull.png. Jaxartosaurus is currently classified as a basal lambeosaurine, more derived than Aralosaurini, but more primitive than Parasaurolophini and Lambeosaurini. It might be more derived than Tsintaosaurini (Godefroit et al., 2004). References: Riabinin, A.M. (1937). "A New Finding of Dinosaurs in the Trans-Baikal Region". Ezhegodn. Vserossijskogo Palaeont. Obstcg. 11: 142–144 Godefroit, P.; Bolotsky, Y.L.; Van Itterbeeck, J. (2004). "The lambeosaurine dinosaur Amurosaurus riabinini, from the Maastrichtian of Far Eastern Russia". Acta Palaeontologica Polonica 49(4): 585–618
Line diagram of the holotype specimen (ZPAL MgD-I/117) of the protoceratopsid Breviceratops kozlowskii. Based on Maryańska & Osmólska 1975,[1] and Czepiński 2019.[2] References ↑ (1975). "Protoceratopsidae (Dinosauria) of Asia". Palaeontologia Polonica 33: 134−143. Archived from the original on 2018-09-21. Retrieved on 2021-07-25. ↑ (2019). "Ontogeny and variation of a protoceratopsid dinosaur Bagaceratops rozhdestvenskyi from the Late Cretaceous of the Gobi Desert". Historical Biology: 1−28. DOI:10.1080/08912963.2019.1593404. Archived from the original on 2021-07-08. Retrieved on 2021-07-25.
Cráneo de Callawayasaurus colombiensis exhibido en el Museo Paleontológico de Villa de Leyva
Photo of a skeletal mount of the incomplete holotype of the pachycephalosaur Homalocephale calathocercos in left lateral view, at the Mongolian Natural History Museum. Scan of physical photograph.
Megacephalosaurus eulerti reconstructed skull in the Rocky Mountain Dinosaur Resource Center, Woodland Park, Colorado.
Skeletal elements of Lophorhothon atopus. (A, B and C) Partial skull roof and braincase (holotype FMNH 27383) in dorsal, ventral, and left lateral views. (D) Partial left nasal of FMNH 27383 in lateral view. (E) Left prefrontal of FMNH 27383 in lateral view. (F) Partial left jugal of FMNH 27383 in medial view. (G) Detail of marginal denticles of the dentary tooth in (H). (H) Apical half of a dentary tooth crown AUMP 2295 in lingual view. (I) Maxillary tooth crown of FMNH 27383 in labial view. (J) Left pubis of AUMP 2295 in lateral view. (K) Iliac process of the left ilium of FMNH 27383 in lateral view.
Cardiocorax mukulu hind limb on display at the Smithsonian's National Museum of Natural History.
Thalassomedon in the American Museum of Natural History Visit my blog at ideonexus.com
Barsboldia sicinskii gen. et sp.n., type specimen ZPAL MgD-11110, Nemegt Formation, N Nemegt, Nemegt Basin, Gobi Desert, Mongolia 1. Right lateral view of sacrum, neural spine of last dorsal and two anterior caudals included.
The holotype of Dianmeisaurus mutaensis (HFUT MT-21-08-001). (A) the skeleton in dorsal view; (B) the counterpart of (A) (natural mold). Scale bars equal 1 cm.
Illustration of the iberian iguanodontian Delapparentia turolensis.
Exhibit in the Royal Ontario Museum, Toronto, Ontario, Canada. This exhibit is old enough so that it is in the public domain, and photography was permitted in the museum. I took this photograph and release it into the public domain.
Skeletal cast mount (CIT 2802) of Morenosaurus stocki on display at the Natural History Museum of Los Angeles County.
Tastavinsaurus de El Castellar (Teruel, España). Fémur, tibia y fíbula izquierdos. En exposición en el museo paleontológico de Dinópolis.