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441 results for “Maastrichtian”
Fig. 1 in Orbitolinid Foraminifera From The Late Maastrichtian Of The Tarbur Formation (Zagros Zone, Sw Iran)
Fig. 1 Location map of the two studied sections.
Fig. 1 in Dasycladalean Fossil Green Algae From The Maastrichtian-Paleocene Of Balkh Province (N Afghanistan)
Fig. 1 Location map of the studied series near Kholm (Balkh province, N Afghanistan).
Fig. 2 in On The Occurrence Of Salpingoporella Pasmanica Radoičić, 2002, (Dasycladales) From The Late Maastrichtian Of The Zagros Zone, Sw Iran
Fig. 2 Location map of the studied area and Mandegan section.
Data from: New sharks and other Chondrichthyans from the latest Maastrichtian (Late Cretaceous) of North America
Open the record for dataset details and reuse information.
Figure 4 in Dinosaur Census Reveals Abundant Tyrannosaurus and Rare Ontogenetic Stages in the Upper Cretaceous Hell Creek Formation (Maastrichtian), Montana, USA
Figure 4. Pie chart of the time averaged census for largebodied dinosaurs from the entire Hell Creek Formation in the study area. Triceratops is the most common dinosaur at 40% (n = 72); Tyrannosaurus is second at 24% (n = 44); Edmontosaurus is third at 20% (n = 36) followed by Thescelosaurus at 8% (n = 15)ı Ornithomimus at 5% (n = 9)ı and Pachycephalosaurus and Ankylosaurus at 1% (n = 2). doi:10.1371/journal.pone.0016574.g004
Figure 1 in Dinosaur Census Reveals Abundant Tyrannosaurus and Rare Ontogenetic Stages in the Upper Cretaceous Hell Creek Formation (Maastrichtian), Montana, USA
Figure 1. Index map of the Upper Cretaceous Hell Creek Formation along Ft. Peck Lake in northeastern Montana, USA. Contiguous outcrops are traceable over an area of about 1000 square km adjacent to Fort Peck Lake shown in blue. Dark orange represents the lower Hell Creek Formation and light orange represents the middle and upper Hell Creek Formation. The enlarged view of the study area is indicated by the rectangle in the northeast quarter of the map of Montana. doi:10.1371/journal.pone.0016574.g001
Figure 2 in Dinosaur Census Reveals Abundant Tyrannosaurus and Rare Ontogenetic Stages in the Upper Cretaceous Hell Creek Formation (Maastrichtian), Montana, USA
Figure 2. Stratigraphic divisions of the Hell Creek Formation with stratigraphic details of the upper third (U3) and lower third (L3) sequences referenced in the text and the associated pie chart showing dinosaur abundance. Pie charts I – IV reflect the relative abundance of dinosaur genera based on skeletons (charts I and IV) and individual bones (charts II and III). Tyrannosaurus skeletons are as abundant as the hadrosaurid Edmontosaurus, an herbivore, in the upper Hell Creek Formation and nearly twice as common as Edmontosaurus in the lower Hell Creek Formation. Individual bones of Tyrannosaurus and Edmontosaurus are found approximately in the same order of magnitude within the lag deposits. Key: Pie chart I, dinosaur skeletons in the upper Hell Creek Formation (U3); Pie chart II, dinosaur bones from the ''Doldrum's'' lag deposit at the base of the Apex Sandstone (AS); Pie chart III, dinosaur bones from the ''3B-1'' lag deposit at the base of the Jen-rex Sand; and Pie chart IV, dinosaur skeletons from the lower Hell Creek Formation (L3). Abbreviations: L3lBS, lower basal sandstone; L3.mBS, middle basal sandstone; L3.uBS, upper basal sandstone; L3.lMS, lower mudstone; L3.mMS, middle mudstone; L3.uMS, upper mudstone; U3.AS, Apex sandstone; U3.ibMS, interbedded mudstone; U3.10mS, 10 meter sandstone; U3.uMS, upper mudstone; U3.CZ, coal zone. doi:10.1371/journal.pone.0016574.g002
FIG. 2 in Tyrannosaur cannibalism: A case of a tooth-traced tyrannosaurid bone in the Lance Formation (Maastrichtian), Wyoming
FIG. 2.—Tooth traces on SWAU HRS13997. The two sets of Knethichnus paralleum and Linichnus serratus are indicated, with the more prominent pair on the right. Scale bar = 20 mm.
FIG. 5 in Tyrannosaur cannibalism: A case of a tooth-traced tyrannosaurid bone in the Lance Formation (Maastrichtian), Wyoming
FIG. 5.—Comparison between four specimens of tyrannosaurid metatarsals: A) Tyrannosaurus rex metatarsal IV (SWAU HRS13997). B) Tyrannosaurus rex metatarsals II-IV (LACM 23845, with IV sculpted). C) Tyrannosauridae indet. metatarsal IV (IGM 6130; modified from Peecook (2014, fig. 3). D) Tyrannosaurus rex metatarsals II-IV (FMNH PR2081; modified from Brochu (2003, figs. 99, 100, 101). SWAU HRS13997 and IGM 6130 are metatarsal IV. All elements are from the right pes except IGM 6130, which is a left element, although the image has been flipped to make it match the others. Note that FMNH PR2081 is shown in a more medial view than the other metatarsal specimens. Scale bar = 100 mm.
FIGURE 2 in Tyrannosaurus rex from the Upper Cretaceous (Maastrichtian) North Horn Formation of Utah: biogeographic and paleoecologic implications
FIGURE 2. Reconstruction of late Maastrichtian paleogeography, paleoenvironments, and dinosaur biogeography for the Western Interior of North America. A. Paleoenvironments mapped onto paleogeographic and biogeographic data: white = water (Pacific Ocean and Late Cretaceous Interior Seaway); light gray = seasonally moist coastal plain; white stipple = semiarid alluvial plain; gray stipple = semiarid upland, intermontane basins; and dark gray = upland thrust belts and early Laramide uplifts. Known paleogeographic distribution of three herbivorous dinosaurs are indicated as follows: Alamosaurus sanjuanensis occurrences indicated with ■; Leptoceratops gracilis occurrences indicated with a •; and Triceratops horridus occurrences indicated with a A. Numbers denote fossil sites within specific geologic formations. Geologic formations are indicated as follows: 1 = Scollard, 2 = Willow Creek, 3 = Frenchman, 4 = Hell Creek, 5 = Lance, 6 = Evanston, 7 = Laramie, 8 = North Horn, 9 = Denver, 10 = Kirtland Shale, 11 = McRae, 12 = El Picacho, 13 = Javelina. The North Horn Formation is further indicated by a star. Occurrences of fossil taxa are listed in Gillette et al. (1986), Lehman (1987) and Ryan and Russell (2001). B. Known paleogeographic distribution of the theropod Tyrannosaurus rex. Open circles denote occurrences, except for the North Horn Formation, indicated by a star.
Figure 16 in Diversity of late Maastrichtian Tyrannosauridae (Dinosauria: Theropoda) from western North America
Figure 16. Right otoccipital of LACM 23845 in lateral (A) and medial (B) views; quadrate process of the left pterygoid in lateral (C) and medial (D) views.
Figure 5 in Diversity of late Maastrichtian Tyrannosauridae (Dinosauria: Theropoda) from western North America
Figure 5. Comparison of the right dentary (reversed) of LACM 28471 with those of other tyrannosaurid juveniles.
Figure 3 in Diversity of late Maastrichtian Tyrannosauridae (Dinosauria: Theropoda) from western North America
Figure 3. Mandibular bones of LACM 28471. Right surangular in lateral (A), dorsal (B), and ventral (C) views; left (D) and right (E) dentaries in lateral view with diagrammatic cross sections of teeth. Cross sections are not to scale.
Figure 4 in Diversity of late Maastrichtian Tyrannosauridae (Dinosauria: Theropoda) from western North America
Figure 4. Diagrammatic sketches of cross sections of the dentition of LACM 28471 in comparison with that of another juvenile Tyrannosaurus rex (CMNH 7541). Numbers indicate alveolus position from mesial to distal.
Figure 7 in Diversity of late Maastrichtian Tyrannosauridae (Dinosauria: Theropoda) from western North America
Figure 7. Comparison of tyrannosaurid snouts in dorsal view, showing the appressed state of the nasal processes of the premaxilla in Tyrannosaurus rex. AMNH 5027 modified after Osborn (1912), CMN 8506 modified after Russell (1970).
Figure 10 in Diversity of late Maastrichtian Tyrannosauridae (Dinosauria: Theropoda) from western North America
Figure 10. Comparison of the lacrimonasal articulation of LACM 23845 with other tyrannosaurids in left lateral view. AMNH 5027 modified after Osborn (1912), PIN 551–1 after Maleev (1974), and CMN 8506 after Russell (1970).
Figure 6 in Diversity of late Maastrichtian Tyrannosauridae (Dinosauria: Theropoda) from western North America
Figure 6. Comparison of the snouts of tyrannosaurids in left lateral view showing the contact of the antorbital fossa and nasal suture among tyrannosaurids. AMNH 5027 modified after Osborn (1912), CMN 8506 modified after Russell (1970).
Figure 3 in A new basal ornithopod dinosaur (Frenchman Formation, Saskatchewan, Canada), and implications for late Maastrichtian ornithischian diversity in North America
Figure 3. The geographic location of the RSM P 1225.1 quarry. A, the location of the Province of Saskatchewan in Canada, highlighting the area of south-western Saskatchewan illustrated in (B). B, regional map of southwestern Saskatchewan with star indicating the location of the quarry on the north side of the Frenchman River Valley near Cambery Coulee.
FIGURE 1 in Maastrichtian representatives of the dragonfly family Aeschnidiidae question the entomofaunal turnover of the early Late Cretaceous
FIGURE 1. Dakotaeschnidium spedeni gen. et sp. nov., holotype YPM IP 028154. A, Part. B, Counterpart. Scale bars = 5 mm.
FIG. 1.—A Tyrannosaurus rex metatarsal IV in Tyrannosaur cannibalism: A case of a tooth-traced tyrannosaurid bone in the Lance Formation (Maastrichtian), Wyoming
FIG. 1.—A Tyrannosaurus rex metatarsal IV (SWAU HRS13997) in four views. Scale bar = 100 mm.
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Allen Brain Atlas
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Annotated Behaviour and Observability Dataset (ABODe)
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DANDI Archive for NWB datasets
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International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
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.