Galerie d'images
Toutes les images de la base — taxons, formations et intervalles géologiques.
⚠ La fonctionnalité de récupération des images est en cours de test, des images non pertinentes peuvent apparaître.
4,826 image(s)
Life restoration of the Brazilian ornithocheiroid pterosaur Anhanguera blittersdorffi. Digital painting; credit Matt Martyniuk.
Anhanguera skeleton, North American Museum of Ancient Life.
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.
Original figure caption: Trackway S1 (Eosauropus sp.), here attributed to a sauropod trackmaker based on pedal synapomorphies; trackmaker is moving towards the south-west. Two consequtive pes impressions of a tridactyl Grallator [i.e. a theropod] trackway can be seen left to the S1 trackway. Note: The tracks are preserved on a bedding plane of a thin siltstone bed of the Late Triassic Fleming Fjord Formation of East Greenland. A) shows a photograph of the trackway(s) as preserved on the bedding plane (i.e. as concave epireliefs); B) shows a color shaded relief map based on a high-resolution photogrammetric 3D-model of the bedding plane; C) is an interpretative outline drawing of the S1 trackway; abbreviations: LM = left manus (i.e. forefoot), LP = left pes (i.e. hindfoot), RM = right manus, RP = right pes, numbers increase in walking direction.
The theropod dinosaur Coelophysis bauri by John Conway [1]
Drawings of Dryolestida left upper−molar, modified from the original descriptions. A–C, Kimmeridgian; D–F, Tithonian–Berriasian; G–H, early Barremian; I, late Barremian. A. Left M4 or M5 of Comotherium richi Prothero, 1981, from the Upper Jurassic Morrison Formation, Como Bluff locality, Wyoming, USA. B. Right M5, reversed, of Dryolestes leiriensis Martin, 1999, from Guimarota, Portugal.C. Left M6 of Krebsotherium lusitanicum Martin, 1999, from Guimarota, Portugal. D. Right M4 or M 6 (reversed) of Portopinheirodon asymmetricus Martin, 1999, Porto Pinheiro, Lourinha, Portugal. E. Right M5 (reversed) of Laolestes andresi Martin, 1999, from Porto Pinheiro, Lourinha, Portugal. F. Right upper molar of Donodon perscriptoris Sigogneau−Russell, 1991, Anoual, Morocco.G. Left M4 orM5 of Crusafontia amoae sp. nov., holotype, Cuesta Corrales 2, El Castellar Formation, Galve, Teruel, Spain. H. Right M6 orM7 (reversed) of Crusafontia amoae sp. nov., first described as upper molar of Crusafontia cuencana by Krebs (1993), P−2 H4 Pelejón 2, Galve, Teruel, Spain. I. Left M2 or M3, of Crusafontia cuencana Henkel and Krebs, 1969, Uña, La Huérguina Formation, Cuenca, Spain, (from Krebs 1993). Scale bars 1 mm.
IdentificatieTitel(s): Voetsporen van een Plectropterna gracilis en een Arachnichnus dehiscens. Plectropterna gracilis (titel op object). Arachnichnus dehiscens (titel op object)Objecttype: foto bladzijde Objectnummer: RP-F-2001-7-1066-5Opschriften / Merken: nummer, recto, gedrukt: ‘Plate XVII. Fig. 1. Fig. 2.’Omschrijving: Links de voetsporen van een Plectropterna gracilis, rechts een Arachnichnus dehiscens.VervaardigingVervaardiger: fotograaf: J.L. Lovell (vermeld op object)Plaats vervaardiging: AmherstDatering: ca. 1858 - in of voor 1863Materiaal: fotopapier Techniek: albuminedrukAfmetingen: pagina: h 313 mm × b 232 mmOnderwerpWat: foot-print, trackVerwerving en rechtenCredit line: Aankoop met steun van de Mondriaan Stichting, het Prins Bernhard Cultuurfonds, het VSBfonds, het Paul Huf Fonds/Rijksmuseum Fonds en het Egbert KunstfondsVerwerving: aankoop 2001Copyright: Publiek domein
Two Thescelosaurus skeletons, North American Museum of Ancient Life.
Badlands Dinosaur Museum, North Dakota 5-9-2022 (157)
Thescelosaurus neglectus, an hypsilophodont from North America, pencil drawing
Thescelosaurus neglectus, a hypsilophodont from the Late cretaceous of North America
Paleoartistic depiction of a Cretaceous forest of what is today the Tanis site, in North Dakota, hours after the K-Pg impact. We observe a burnt carcass of a Thescelosaurus, a impaled nanhsiungchelyid turtle, a small multituberculate mammal and a small ornithuran avialan.
Figure 28: Dorsoventral vertebral proportions on the anterior caudal vertebrae of selected ornithopods. (A) Neural arch height ‘a’ (=height from dorsal tip of the spinal process to top of the centrum, or centre of transverse process base) relative to vertebral height ‘b’ (=vertebral height without haemal arch). (B) Neural arch height ‘a’ relative to vertebral height ‘c’ (=vertebral height including haemal arch). Distances ‘a’ and ‘b’ shown in Figs. 9 and 33 and distance ‘c’ shown in Fig. 9. Data sources, see Table S1. Tabulated data, vertebral positions and specimen numbers, see Table S2.
Size comparison between the hypsilophodontid Thescelosaurus and a human
Pectoral girdles and forelimbs of dinosaurs in left lateral view, depicting resting scapular and forelimb orientations in different dinosaurian groups as recommended according to the results of this study. In each case, solid horizontal line is parallel to long axis of sacrum. A. theropods without semilunate carpals (Dilophosaurus wetherilli, UCMP 37302). B. theropods with semilunate carpals other than Caudipteryx (Velociraptor mongoliensis, after reference [60]). C. Caudipteryx (C. sp., after reference [8]). D. ceratopsids (Styracosaurus albertensis, NMC 344). E. basal sauropodomorphs (Plateosaurus engelhardti, AMNH 6810). F. non-hadrosaurian ornithopods (Thescelosaurus neglectus, reference [62]). G. hadrosaurids (Parasaurolophus walkeri, after reference [48]). Angle labels: B = scapular orientation relative to long axis of sacrum. E = elbow angle. S = shoulder angle. W = wrist angle. See Materials and Methods section for descriptions of angles.
Complete specimen, excellent mineralization. Presented with a base (exceptional, very good condition)). Skull length 18,9 inch ( 28,3 inch with vertebras)
Shown is a drawing from Williston (1898) that shows the skeletons of three common species of mosasaurs from Kansas; Clidastes propython, Platecarpus tympaniticus and Tylosaurus proriger. Although these three species are shown about the same size in the drawing, in life, Clidastes was the smallest (about 12-15 feet); Platecarpus was the next largest (about 24 feet) and Tylosaurus was the largest (30 plus feet):
Unidentified Platecarpus sp. partial skeleton at the Natural History Museum in London, England.
Unidentified Platecarpus sp. partial skeleton at the Natural History Museum in London, England.
Crâne de mosasaure d'espèce Platecarpus tympaniticus (squamates, mosasaures). Provenance : Smoky Hill Chalk, Kansas (aux Etats-Unis). Date : Crétacé supérieur, période du Campanien, 88 millions d'années avant notre ère. Collections du Muséum national d'histoire naturelle de Paris (France). Exposé à l'occasion de l'exposition "Un T-Rex à Paris" au Muséum national d'histoire naturelle de Paris (France) du 6 juin au 2 septembre 2018. Légende du fossile dans cette exposition : "Les mosasaures ne sont pas des dinosaures mais des reptiles marins, très répandus à la fin du Crétacé. Certains genres comme Globidens et Halisaurus sont connus aussi bien aux Etats-Unis qu'au Maroc. Ces animaux étaient d'excellents nageurs, capables de traverser l'Atlantique."
Precious opal replacing Ichthyosaur backbone; display specimen, South Australian Museum. Original filename = P2211104.JPG
Muzeum Ewolucji PAN - Platypteryg - zęby Platypterygius campylodon
Left prootic of Acamptonectes densus compared to that of other ophthalmosaurids. A–C: A. densus (GLAHM 132588, holotype), in posterior view (A,B) and anterior view (C). D,E: A. densus (SNHM1284-R), in posterior view. F: Platypterygius australis (QMF14339), in posterior view redrawn from Kear [58]. G: Sveltonectes insolitus (IRSNB R269, holotype), in posterior view, from Fischer et al. [34]. H: Ophthalmosaurus icenicus (NHMUK R4522, mirrored), in posterior view, redrawn from Kirton [43]. I: Ophthalmosaurus icenicus (NHMUK R2161), in posterior view, redrawn from Andrews [51]. Abbreviations: amp: ampulla; avsc: impression of the anterior vertical semicircular canal; hsc: impression of the horizontal semicircular canal; M.a.m.e. facet: facet for attachment of musculus adductor mandibulae externus; sac: sacculus; ut: utriculus.
Phylogeny of the Ichthyosauria according to Fischer et al. 2012.
Phylogeny of Ichthyosauria. Thin lines represent ghost lineages, thick black lines indicate the stratigraphic range of a species. Thick grey lines refer to the stratigraphic range of the corresponding genus.
Ichthyosaurus wervel (Platypterygius, Lêegr Kryt, teegn Darwin, Noord Australië).
Front page of the 2018-I edition of Boletín de Geología, CC-BY 4.0-licensed scientific journal of the UIS
Fig 2. Chrono-, bio- and lithostratigraphic context of the Reuchenette Formation in the Ajoie district, Canton Jura, NW Switzerland (modified from [20,23,28,31]. Four track-bearing intervals, named lower, intermediate, and upper (dinosaur track) levels, and track levels 600 have been identified within the Courtedoux Member (Nerinean Limestones, sensu [32]). All studied material comes from the intermediate (levels 1000–1100) and upper (levels 1500–1650) dinosaur track levels, details shown on inset on the upper right.
A short hike leads past an interpretive sign to a set of Megalosauripus tracks set down 160 million years ago within Bears Ears National Monument. Photos by Bob Wick - BLM
A short hike leads past an interpretive sign to a set of Megalosauripus tracks set down 160 million years ago within Bears Ears National Monument Photos by Bob Wick - BLM
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.
Digital copy of 1978 slide. Natural History Museum, Smithsonian Institution, Washington, D.C. Complete indexed photo collection at WorldHistoryPics.com.
New reconstruction of Tylosaurus proriger, based on recent data about mosasaur's soft tissue
Tylosaurus reconstruction. From Osborn, H. F. (1917). The origin and evolution of life, on the theory of action, reaction and interaction of energy.
Fragmentary fossils of various tylosaurines MCM.M0009 (A ; Taniwhasaurus 'mikasaensis'), SAM-PK-5265 (B ; Taniwhasaurus 'capensis') and MNHN 1896-15 (C ; Tylosaurus gaudryi).
Fragmentary fossils of various tylosaurines MCM.M0009 (A ; Taniwhasaurus 'mikasaensis'), SAM-PK-5265 (B ; Taniwhasaurus 'capensis') and MNHN 1896-15 (C ; Tylosaurus gaudryi).
Restorations of Pteranodon sternbergi (left), Pteranodon longiceps (top), Nyctosaurus (right), and Tylosaurus (bottom).
Restorations of Pteranodon sternbergi (left), Pteranodon longiceps (top), Nyctosaurus (right), and Tylosaurus (bottom).
Drawing of the skull of MCZ 4374, the holotype of Macrosaurus proriger (Tylosaurus proriger) from Cope (1870)
Drawing of the skull of MCZ 4374, the holotype of Macrosaurus proriger (Tylosaurus proriger) from Cope (1870)
Bones and remains of prehistoric animals A massive marine lizard and apex predator, growing to length of 14 m (46 ft).[1]
Fossil of Carinodens, an extinct mosasaur- Took the photo at Natural History Museum of Maastricht
Bakonydraco galaczi modified to be a tapejarid, from azhdarchid original.
Bakonydraco galaczi modified to be a tapejarid, from azhdarchid original.