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441 results for “Maastrichtian”
FIG. 3 in Tyrannosaur cannibalism: A case of a tooth-traced tyrannosaurid bone in the Lance Formation (Maastrichtian), Wyoming
FIG. 3.—Details of Knethichnus parallelum and Linichnus serratus traces on SWAU HRS13997. A) Most prominent K. parallelum (center) and L. serratus (bottom) examples. B) Most prominent L. serratus in more detail and a different lighting angle. Small portion of the most prominent K. parallelum is also visible in the lower right corner. C) Detailed view of the other, less prominent L. serratus (left) and K. parallelum (right) traces. All scale bars = 1 mm.
FIGURE 1. A in Tyrannosaurus rex from the Upper Cretaceous (Maastrichtian) North Horn Formation of Utah: biogeographic and paleoecologic implications
FIGURE 1. A. Skeletal restoration of UMNH 11000, Tyrannosaurus rex, with preserved elements highlighted. Right postorbital and squamosal of UMNH 11000 are shown separately in right lateral view. Abbreviations: co, cornual ossification; ltf, lateral temporal fenestra; o, orbit; PO, postorbital; qjp, quadratojugal process of squamosal; sp, suborbital process; SQ, squamosal. Scale bar equals 10 cm. B. Postorbitals and squamosals of various tyrannosaurids viewed in right lateral view: Gorgosaurus, TMP 91.36.500 (reflected and modified after Currie, 2003a); Albertosaurus, TMP 81.10.1 (reflected and modified after Currie 2003b); Daspletosaurus, combination of NMC 8506 and TMP 2001.36.1 (reflected and modified after Currie 2003b); Tarbosaurus, ZPAL MgD-1/4 (reflected and modified after Hurum and Sabath, 2003); Tyrannosaurus, FMNH PR 2081 (reflected and modified after Brochu, 2003) and UMNH VP 11000.
Figure 19 in Diversity of late Maastrichtian Tyrannosauridae (Dinosauria: Theropoda) from western North America
Figure 19. Diagram of the results of a quantitative reconstruction of a growth series of five Tyrannosaurus rex specimens.
Figure 8 in Diversity of late Maastrichtian Tyrannosauridae (Dinosauria: Theropoda) from western North America
Figure 8. Comparison of the dorsal skull roof of LACM 28345 with other tyrannosaurids. AMNH 5027 modified after Osborn (1912) and CMN 8506 modified after Russell (1970).
Figure 13 in Diversity of late Maastrichtian Tyrannosauridae (Dinosauria: Theropoda) from western North America
Figure 13. Comparison of the surangular of LACM 23845 with other tyrannosaurids in left lateral view. AMNH 5027 modified after Osborn (1912) and CMN 8506 after Russell (1970).
Figure 12 in Diversity of late Maastrichtian Tyrannosauridae (Dinosauria: Theropoda) from western North America
Figure 12. Comparison of the quadratojugal of LACM 23845 with other tyrannosaurids in left lateral view. AMNH 5027 modified after Osborn (1912) and PIN 551–2 after Maleev (1974).
FIG. 4 in Tyrannosaur cannibalism: A case of a tooth-traced tyrannosaurid bone in the Lance Formation (Maastrichtian), Wyoming
FIG. 4.—Histology of a Tyrannosaurus rex metatarsal (SWAU HRS13997) in cross section under different light regimes. A) Section of cortical bone from the medullary cavity (left) to the subperiosteal surface (right) under regularly transmitted light. Boxes show where areas of this bone are shown in higher detail under regularly transmitted light (B, F, J), cross-polarized light (C, G, K), cross-polarized light with a waveplate (D, H, L), and reflected light (E, I, M). Scale bar for A = 5 mm, all other scale bars = 1 mm.
Data from: Late Cretaceous European theropod palaeobiodiversity, palaeobiogeography and the intra-Maastrichtian faunal turnover: new contributions from the Iberian fossil site of Laño
<p>A total of 227 theropod teeth have so far been recovered from the late Campanian Laño site (northern Iberian Peninsula). The teeth were studied for their qualitative and quantitative features. From the theropod sample found at Laño, seven morphotypes attributed to five taxa are identified: a medium to large abelisaurid (<i>Arcovenator</i> sp.) and four small coelurosaurians (Dromaeosauridae indet., Paraves indet., cf. <i>Paronychodon</i> sp. and cf. <i>Richardoestesia</i> sp.). Together with the ground bird <i>Gargantuavis</i> and a possible ornithomimosaur, the theropod fauna of Laño might be composed of two medium- to large-sized non-avian theropods, four small-bodied non-avian theropods and a large terrestrial bird. This makes the Laño site the richest and most diverse latest Cretaceous theropod site of Europe. Furthermore, the Laño site and the Late Cretaceous localities of Europe that have yielded theropod remains suggest that the medium- to large-sized theropods were abelisaurids or indeterminate theropods. The small theropods are more abundant, diverse and represented by different dromaeosaurids, <i>Paronychodon</i>, <i>Richardoestesia</i>, or related forms, troodontids and, probably, by other paravians. Among birds, enantiornithines, gargantuaviids and ornithurines are also common in the European Late Cretaceous sites. The theropod assemblage of Laño, together with the taxa of other Late Cretaceous sites, supports the idea that several theropod dispersal events took place during the Cretaceous. This resulted in a mixture of European endemic, Asiamerican and Gondwanan forms. This study also supports the hypothesis that the intra-Maastrichtian faunal turnover that occurred in the Ibero-Armorican landmass seems to have had no effect on theropods.</p>
Fig. 4 in The Jordan theropod (Maastrichtian, Montana, U.S.A.) referred to the genus Aublysodon.
Fig. 4 - Comparison of The skulls of A, Aubtysodon; B, Coelopbysis (AMNB 7224); C, Dromaeosaurus (modified from Coibert & Russell, 1969, Fig. 1); D, Velociraptor (modified from Barsbold, 1982, Fig. la); E, Sauromitboides (modified from Barsbold, 1974, Pl. 1), V, Dromiceiomimus (modified from Russell, 1972, Fig. 5, and ROM 840); G, Caegnatbus (modified from Sternberg, 1949, Fig. 1, and Barsbold, 1982, Fig. c); H, Albeltosaurus libratus (modified from Gilmore, 1946, Pl. 4, Fig. 3); I, Daspletosaurus torosus (modified from Russell, 1970, Fig. 6); J, " Albertosaurus " lancensis (modified from Gilmore, 1946, Pl. 1); H, Tyrannosaurus (modified from Osborn, 1912, Fig. 1); L, lingual (top) and labial (bottom) views of the dentaries of " Cbirostenotes " (modified from Gilmore, 1924, Fig. 3). Scale bar represents 10 cm. Comparaison des cranes des divers théropodes: A, Aubtysodon; B, Coelopbysis (AMNB 7224); C, Dromaeosaurus (modifiés d'après Colbert & Russell 1969, Fig. 1); D, Velociraptor (modifié d'après Barsbold 1982, Fig. la); E, Sauromitboides (modifié d'après Barsbold 1974, Pl. 1); F, Dromiceiomimus (modifié d'après Russell 1972, Fig. 5 et ROM 840); C, Caenagnatbus (modifié d'après Sternberg 1949, Fig. 1 et Barsbold 1982, Fig. c); H, Albertosaurus libratus (modifié d'après Gilmore 1946, PI. 4, Fig. 3); I, Daspletosaurus torosus (modifié d'après Russell 1970, Fig. 6); J, " Albertosaurud' lancensis (modifié d'après Gilmore 1946, Pl. 1); K, Tyrannosaurus (modifié d'après Osborn 1912, Fig. 1); L, les vues linguale (en haut) et labiale (en bas) des dentaires du " Cbirostenotes " (modifié d'après Gilmore 1924, Fig. 3). Echelle = 10 cm.
Fig. 2 in The Jordan theropod (Maastrichtian, Montana, U.S.A.) referred to the genus Aublysodon.
Fig. 2 - Cheek teeth of Aubtysodon mirandus. Left sixth maxillary tooth, as preserved, in lateral (A) and posterior (B) aspects. Right fourth dentary tooth, rendered in unworn condition, in anterior (C) and labial (D) aspects. Scale bar represents 10 mm. Les dents jugales de VAubtysodon mirandus. Sixième dent maxiliaire gauche telle qu'elle est conservée en vue laterale (A) et vue postérieure (B). Quatrième dent du dentaire droit, figurées sans usure en vue antérieure (C) et en vue labiale (D). Echelle: 10 mm.
Fig. 2 in The Jordan theropod (Maastrichtian, Montana, U.S.A.) referred to the genus Aublysodon.
Fig. 2 - Cheek teeth of Aubtysodon mirandus. Left sixth maxillary tooth, as preserved, in lateral (A) and posterior (B) aspects. Right fourth dentary tooth, rendered in unworn condition, in anterior (C) and labial (D) aspects. Scale bar represents 10 mm. Les dents jugales de VAubtysodon mirandus. Sixième dent maxiliaire gauche telle qu'elle est conservée en vue laterale (A) et vue postérieure (B). Quatrième dent du dentaire droit, figurées sans usure en vue antérieure (C) et en vue labiale (D). Echelle: 10 mm.
Fig. 4 in The Jordan theropod (Maastrichtian, Montana, U.S.A.) referred to the genus Aublysodon.
Fig. 4 - Comparison of The skulls of A, Aubtysodon; B, Coelopbysis (AMNB 7224); C, Dromaeosaurus (modified from Coibert & Russell, 1969, Fig. 1); D, Velociraptor (modified from Barsbold, 1982, Fig. la); E, Sauromitboides (modified from Barsbold, 1974, Pl. 1), V, Dromiceiomimus (modified from Russell, 1972, Fig. 5, and ROM 840); G, Caegnatbus (modified from Sternberg, 1949, Fig. 1, and Barsbold, 1982, Fig. c); H, Albeltosaurus libratus (modified from Gilmore, 1946, Pl. 4, Fig. 3); I, Daspletosaurus torosus (modified from Russell, 1970, Fig. 6); J, " Albertosaurus " lancensis (modified from Gilmore, 1946, Pl. 1); H, Tyrannosaurus (modified from Osborn, 1912, Fig. 1); L, lingual (top) and labial (bottom) views of the dentaries of " Cbirostenotes " (modified from Gilmore, 1924, Fig. 3). Scale bar represents 10 cm. Comparaison des cranes des divers théropodes: A, Aubtysodon; B, Coelopbysis (AMNB 7224); C, Dromaeosaurus (modifiés d'après Colbert & Russell 1969, Fig. 1); D, Velociraptor (modifié d'après Barsbold 1982, Fig. la); E, Sauromitboides (modifié d'après Barsbold 1974, Pl. 1); F, Dromiceiomimus (modifié d'après Russell 1972, Fig. 5 et ROM 840); C, Caenagnatbus (modifié d'après Sternberg 1949, Fig. 1 et Barsbold 1982, Fig. c); H, Albertosaurus libratus (modifié d'après Gilmore 1946, PI. 4, Fig. 3); I, Daspletosaurus torosus (modifié d'après Russell 1970, Fig. 6); J, " Albertosaurud' lancensis (modifié d'après Gilmore 1946, Pl. 1); K, Tyrannosaurus (modifié d'après Osborn 1912, Fig. 1); L, les vues linguale (en haut) et labiale (en bas) des dentaires du " Cbirostenotes " (modifié d'après Gilmore 1924, Fig. 3). Echelle = 10 cm.
text-fig. 6. Skull reconstructions of representatives of Cretaceous OTUs in left lateral view, a, abelisaurid Camotaurus sastrei, Late Cretaceous (Campanian), Gorro Frigio Formation, Argentina; based on Bonaparte et al. (1990) and MACN CH 894. b, composite skull of a generalized baryonychid; mainly based on Suchomimus tenerensis (MNN GDF 501, 503-506) and Irritator challenged (SMNS 58022), with some elements reconstructed after Baryonyx walkeri (BMNH R 9951). c, carcharodontosaurid Carcharodontosaurus sahariens, Late Cretaceous (Cenomanian), Kem Kem beds, Morocco; based on Sereno et al. (1996) and SGM-Din 1, unpreserved elements shaded. D, dromaeosaurid Velociraptor mongoliensis, Late Cretaceous (Campanian), Djadokhta Formation, Mongolia; based on Barsbold (1983), Barsbold and Osmólska (1999), and AMNH 6515. e, ornithomimosaur Dromiceiomimus brevitertius, Late Cretaceous (Maastrichtian), Horseshoe Canyon Formation, Alberta, Canada; redrawn from Russell (1972). F, oviraptorosaur Oviraptor philoceratops, Late Cretaceous (Campanian), Djadokhta Formation, Mongolia; redrawn from Barsbold et al. (1990). G, therizinosauroid Erlikosaurus andrewsi, Late Cretaceous (Cenomanian- Turonian), Baynshiren Svita, Mongolia; based on Clark et al. (1994). H, tyrannosaurid Gorgosaurus libratus, Late Cretaceous (Campanian), Judith River Formation, Alberta, Canada, redrawn from Molnar et al. (1990). Abbreviations as in Text-figures 4 and 5, and: acc. op., accessory opening of unknown function in the premaxilla of Oviraptor (Barsbold et al. 1990); amf, anterior maxillary foramen; pn, pneumatic openings. Scale bars represent 50 mm (d-g) and 100 mm (a-c, h). in The interrelationships and evolution of basal theropod dinosaurs
text-fig. 6. Skull reconstructions of representatives of Cretaceous OTUs in left lateral view, a, abelisaurid Camotaurus sastrei, Late Cretaceous (Campanian), Gorro Frigio Formation, Argentina; based on Bonaparte et al. (1990) and MACN CH 894. b, composite skull of a generalized baryonychid; mainly based on Suchomimus tenerensis (MNN GDF 501, 503-506) and Irritator challenged (SMNS 58022), with some elements reconstructed after Baryonyx walkeri (BMNH R 9951). c, carcharodontosaurid Carcharodontosaurus sahariens, Late Cretaceous (Cenomanian), Kem Kem beds, Morocco; based on Sereno et al. (1996) and SGM-Din 1, unpreserved elements shaded. D, dromaeosaurid Velociraptor mongoliensis, Late Cretaceous (Campanian), Djadokhta Formation, Mongolia; based on Barsbold (1983), Barsbold and Osmólska (1999), and AMNH 6515. e, ornithomimosaur Dromiceiomimus brevitertius, Late Cretaceous (Maastrichtian), Horseshoe Canyon Formation, Alberta, Canada; redrawn from Russell (1972). F, oviraptorosaur Oviraptor philoceratops, Late Cretaceous (Campanian), Djadokhta Formation, Mongolia; redrawn from Barsbold et al. (1990). G, therizinosauroid Erlikosaurus andrewsi, Late Cretaceous (Cenomanian- Turonian), Baynshiren Svita, Mongolia; based on Clark et al. (1994). H, tyrannosaurid Gorgosaurus libratus, Late Cretaceous (Campanian), Judith River Formation, Alberta, Canada, redrawn from Molnar et al. (1990). Abbreviations as in Text-figures 4 and 5, and: acc. op., accessory opening of unknown function in the premaxilla of Oviraptor (Barsbold et al. 1990); amf, anterior maxillary foramen; pn, pneumatic openings. Scale bars represent 50 mm (d-g) and 100 mm (a-c, h).
Figure 24 in A new basal ornithopod dinosaur (Frenchman Formation, Saskatchewan, Canada), and implications for late Maastrichtian ornithischian diversity in North America
Figure 24. Time-correlated phylogeny for basal ornithopod taxa illustrating relative abundance through time. Note the Maastrichtian radiation of Thescelosaurus in North America and Zalmoxes in Europe. The iguanodontian radiation is represented as a single line because of size constraints. Al, Albian; Ap, Aptian; Ba, Barremian; Be, Berriasian; Ca, Campanian; Ce, Cenomanian; Co, Coniacian; H, Hauterivian; LJ, Late Jurassic; M, Maastrichtian; MJ, Middle Jurassic; S, Santonian; T, Turonian; V, Valanginian. Modified from Weishampel et al., 2003.
Figure 23 in A new basal ornithopod dinosaur (Frenchman Formation, Saskatchewan, Canada), and implications for late Maastrichtian ornithischian diversity in North America
Figure 23. The single most-parsimonious tree (tree length 361 steps) recovered from the cladistic analysis using the implicit enumeration search option in TNT. Bootstap values (1000 replicates) above 50% are reported below the branches, and Bremer support values greater than 1 are reported above.
Figure 22 in A new basal ornithopod dinosaur (Frenchman Formation, Saskatchewan, Canada), and implications for late Maastrichtian ornithischian diversity in North America
Figure 22. Left pes of the holotype of Thescelosaurus assiniboiensis sp. nov., RSM P 1225.1, in dorsal (A), plantar (B), and proximal (C) views. Dashed lines indicate the extrapolated margins of the pes. See list in text for an explanation of anatomical abbreviations. Hatched areas represent incomplete bone surface. White areas represent plaster reconstruction. Roman numerals denote digit number.
Figure 21 in A new basal ornithopod dinosaur (Frenchman Formation, Saskatchewan, Canada), and implications for late Maastrichtian ornithischian diversity in North America
Figure 21. Left tibia, fibula, astragalus calcaneum, and distal lateral tarsal of the holotype of Thescelosaurus assiniboiensis sp. nov., RSM P 1225.1, in anterior (A), posterior (B), medial (C), lateral (D), proximal (E), and distal (F) views. See list in text for an explanation of anatomical abbreviations. Primes indicate illustrations of photographed elements. Hatched areas represent incomplete bone surface. White areas represent plaster reconstruction.
Figure 19 in A new basal ornithopod dinosaur (Frenchman Formation, Saskatchewan, Canada), and implications for late Maastrichtian ornithischian diversity in North America
Figure 19. Right pubis of the holotype of Thescelosaurus assiniboiensis sp. nov., RSM P 1225.1, in dorsal (A), ventral (B), medial (C), and lateral (D) views. Dashed lines indicate the extrapolated margins of the element. See list in text for an explanation of anatomical abbreviations. Primes indicate illustrations of photographed elements. Hatched areas represent incomplete bone surface. White areas represent plaster reconstruction.
Figure 16. A in A new basal ornithopod dinosaur (Frenchman Formation, Saskatchewan, Canada), and implications for late Maastrichtian ornithischian diversity in North America
Figure 16. A left rib of the holotype of Thescelosaurus assiniboiensis sp. nov., RSM P 1225.1, in anterior (A), posterior (B), medial (C), and lateral (D) views, and showing flattened and rugose posterior margin (E). Lateral view shows cross-sectional shape along the shaft, with the lateral surface facing upwards. See list in text for an explanation of anatomical abbreviations. Primes indicate illustrations of photographed elements. Dashed lines indicate extrapolated margins of the element. White areas represent plaster reconstruction.
Figure 20 in A new basal ornithopod dinosaur (Frenchman Formation, Saskatchewan, Canada), and implications for late Maastrichtian ornithischian diversity in North America
Figure 20. Left femur of the holotype of Thescelosaurus assiniboiensis sp. nov., RSM P 1225.1, in anterior (A), posterior (B), medial (C), lateral (D), proximal (E), and distal (D) views. Dashed lines indicate the extrapolated margins of the element. See list in text for an explanation of anatomical abbreviations. Primes indicate illustrations of photographed elements. Hatched areas represent incomplete bone surface. White areas represent plaster reconstruction.
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Allen Brain Atlas
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International Brain Laboratory public data
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OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.