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1,137 results for “Upper Cretaceous”
Fig. 3 in Dimorphism in tetragonitid ammonoid Tetragonites minimus from the Upper Cretaceous in Hokkaido, Northern Japan
Fig. 3. Measurements of the conch geometries of tetragonitid ammonoid Tetragonites minimus Shigeta, 1989, from the Yezo Group in Hokkaido, Japan. A. Measured parameters on the specimens polished along the median plane. B. Measured ontogenetic changes of parameters on the specimens polished along the median plane, followed by the perpendicular plane. Abbreviations: B, whorl breadth; D, shell diameter; H1, whorl height; H2, ventral whorl height; PD, phragmocone diameter; U, umbilical width.
Fig. 1. A in Dimorphism in tetragonitid ammonoid Tetragonites minimus from the Upper Cretaceous in Hokkaido, Northern Japan
Fig. 1. A. Location map around studied areas in Hokkaido, Japan (inset shoving location of Yezo Group deposits). B. Generalized columnar section of the Santonian, Yezo Group in the Kotanbetsu area showing stratigraphic occurrence of dimorphic pairs of Tetragonites minimus Shigeta, 1989, and the selected stage-diagnostic mega-fossils. Double head arrows indicate the areas where the columnar sections were constructed. See Aiba (2019) for details of stratigraphy. Abbreviations: C., Creek; R., River.
Fig. 2 in Dimorphism in tetragonitid ammonoid Tetragonites minimus from the Upper Cretaceous in Hokkaido, Northern Japan
Fig. 2. Photographs of microconch and macroconch in lateral view of tetragonitid ammonoid Tetragonites minimus Shigeta, 1989, from the Santonian, Yezo Group, Horotatesawa Creek (A, outcrop HR001, and B, HR109) the Kotanbetsu area, Hokkaido, Japan. A. MCM-W1560 [m]. B. MCM-W1572 [M].
Fig. 11 in Ontogeny and variation in the skull roof and braincase of the hadrosaurid dinosaur Maiasaura peeblesorum from the Upper Cretaceous of Montana, USA
Fig. 11. Hadrosaurid dinosaur Maiasaura peeblesorum Horner and Makela, 1979 (ROM 66180), from the Two Medicine Formation (Campanian), Linster Quarry, Montana, USA; lateral wall of neurocranium showing the prominent overhang of the crista prootica in right lateral (A1) and oblique right posteroventral (A2) views.
Fig. 9 in Ontogeny and variation in the skull roof and braincase of the hadrosaurid dinosaur Maiasaura peeblesorum from the Upper Cretaceous of Montana, USA
Fig. 9. Hadrosaurid dinosaur Maiasaura peeblesorum Horner and Makela, 1979, from the Two Medicine Formation (Campanian), Linster Quarry, Montana, USA; partial skull of ROM 60261 in left lateral view.
Fig. 8 in Ontogeny and variation in the skull roof and braincase of the hadrosaurid dinosaur Maiasaura peeblesorum from the Upper Cretaceous of Montana, USA
Fig. 8. Hadrosaurid dinosaur Maiasaura peeblesorum Horner and Makela, 1979, from the Two Medicine Formation (Campanian), Linster Quarry, Montana, USA; partial skull of ROM 60261 in anterior view.
Fig. 6 in Ontogeny and variation in the skull roof and braincase of the hadrosaurid dinosaur Maiasaura peeblesorum from the Upper Cretaceous of Montana, USA
Fig. 6. Hadrosaurid dinosaur Maiasaura peeblesorum Horner and Makela, 1979, from the Two Medicine Formation (Campanian), Linster Quarry, Montana, USA (A–C) and Brachylophosaurus canadensis Sternberg, 1953, from Oldman Formation (Campanian) of Alberta, Little Sandhill Creek, Canada (D); detail of anterior margins of dorsotemporal fenestrae showing the variable development of overhanging ledges. A. ROM 66181, in oblique left posterodorsal view. B. ROM 60260, in oblique right posterodorsal view. C. ROM 66180, in posterodorsal view. D. CMN 8893, in oblique right posteroventral view, detail of overhanging ledge viewed through the right lateral temporal fenestra. Scale bars 20 mm.
Fig. 3 in Ontogeny and variation in the skull roof and braincase of the hadrosaurid dinosaur Maiasaura peeblesorum from the Upper Cretaceous of Montana, USA
Fig. 3. Hadrosaurid dinosaur Maiasaura peeblesorum Horner and Makela, 1979 (ROM 66182) from the Two Medicine Formation (Campanian), Linster Quarry, Montana, USA; disarticulated partial nasals. A. Paired posterior parts of nasals in dorsal (A1), anterior (A2), ventral (A3), and medial A4) views. B. Middle part of a nasal in lateral view. C. Anterior part of a nasal in lateral view.
Fig. 2 in Ontogeny and variation in the skull roof and braincase of the hadrosaurid dinosaur Maiasaura peeblesorum from the Upper Cretaceous of Montana, USA
Fig. 2. Hadrosaurid dinosaur Maiasaura peeblesorum Horner and Makela, 1979, from the Two Medicine Formation (Campanian), Linster Quarry, Montana, USA; partial crania in dorsal view. A. ROM 66182. B. ROM 66181. C. ROM 66180. D. ROM 60261. E. ROM 60260.
Fig. 1 in Ontogeny and variation in the skull roof and braincase of the hadrosaurid dinosaur Maiasaura peeblesorum from the Upper Cretaceous of Montana, USA
Fig. 1. Hadrosaurid dinosaur Maiasaura peeblesorum Horner and Makela, 1979, from the Two Medicine Formation (Campanian), Linster Quarry, Montana, USA; partial crania in right lateral view. A. ROM 66182. B. ROM 66181. C. ROM 60261. D. ROM 60260. E. ROM 66180.
Fig. 10 in Ontogeny and variation in the skull roof and braincase of the hadrosaurid dinosaur Maiasaura peeblesorum from the Upper Cretaceous of Montana, USA
Fig. 10. Hadrosaurid dinosaur Maiasaura peeblesorum Horner and Makela, 1979 (ROM 60261), from the Two Medicine Formation (Campanian), Linster Quarry, Montana, USA; lateral wall of neurocranium showing possible variation in the position of cranial nerve VII in left lateral (A1) and right lateral (A2) views.
Fig. 4 in Ontogeny and variation in the skull roof and braincase of the hadrosaurid dinosaur Maiasaura peeblesorum from the Upper Cretaceous of Montana, USA
Fig. 4. Hadrosaurid dinosaur Maiasaura peeblesorum Horner and Makela, 1979 (ROM 66180), from the Two Medicine Formation (Campanian), Linster Quarry, Montana, USA; partial skull of in anterior (A1) and anterodorsal (A2) views, with schematic interpretation of prefrontal–nasal crest morphology.
Fig. 12 in Ontogeny and variation in the skull roof and braincase of the hadrosaurid dinosaur Maiasaura peeblesorum from the Upper Cretaceous of Montana, USA
Fig. 12. Hadrosaurid dinosaur Maiasaura peeblesorum Horner and Makela, 1979, from the Two Medicine Formation (Campanian), Linster Quarry, Montana, USA; skulls in posterior view A. ROM 60261. B. ROM 66180. ROM 66180 is photographed in a slightly more posterodorsal perspective than ROM 60261; in actuality, the basipterygoid processes of both specimens project ventral to the occipital condyle.
Fig. 13 in Ontogeny and variation in the skull roof and braincase of the hadrosaurid dinosaur Maiasaura peeblesorum from the Upper Cretaceous of Montana, USA
Fig. 13. Hadrosaurid dinosaur Maiasaura peeblesorum Horner and Makela, 1979, from the Two Medicine Formation (Campanian), Linster Quarry, Montana, USA; basicrania in ventral view. A. ROM 66182. B. ROM 60261. C. ROM 60260. D. ROM 66180. Arrows point to the contact between the basisphenoid (anterior) and basioccipital (posterior), and illustrate the variable orientation of this contact. Scale bars 20 mm.
Fig. 7 in Ontogeny and variation in the skull roof and braincase of the hadrosaurid dinosaur Maiasaura peeblesorum from the Upper Cretaceous of Montana, USA
Fig. 7. Dorsotemporal bar of hadrosaurid dinosaur Maiasaura peeblesorum Horner and Makela, 1979 (ROM 60261, A; ROM 66180, C), from the Two Medicine Formation (Campanian), Linster Quarry, Montana, USA; compared to Brachylophosaurus canadensis Sternberg, 1953 (CMN 8893, B) from the Oldman Formation (Campanian) of Alberta, Little Sandhill Creek, Canada. A, B1 in right lateral view; B2, C in dorsal view. Scale bars 20 mm.
Fig. 5 in Ontogeny and variation in the skull roof and braincase of the hadrosaurid dinosaur Maiasaura peeblesorum from the Upper Cretaceous of Montana, USA
Fig. 5. Hadrosaurid dinosaur Maiasaura peeblesorum Horner and Makela, 1979, from the Two Medicine Formation (Campanian), Linster Quarry, Montana, USA; detail of frontal morphology showing the variable development of frontal depressions. A. ROM 66182, in anterodorsal view. B. ROM 66181, in oblique right anterodorsal view. C. ROM 66180, in oblique right posterodorsal view. Scale bars 20 mm.
Fig. 6 in A new vesselless angiosperm stem with a cambial variant from the Upper Cretaceous of Antarctica
Fig. 6. Simplified phylogenetic representation (modified from APG VI 2016), with the three main atypical morphological characters discussed: presence of AVES pattern, absence of vessels, and presence of transitional tracheid-vessel elements.
Fig. 5 in A new vesselless angiosperm stem with a cambial variant from the Upper Cretaceous of Antarctica
Fig. 5. World distribution of extant Chloranthaceae (red area) and sites where macro/meso fossils of the family were found (asterisks): Couperites USA), Chloranthistemon (Sweden and USA), Asteropollis plant and Canrightia (Portugal), Zlatkocarpus (Czech Republic), loose anthers Argentina), and Sarcandraxylon gen. nov. (Antarctic Peninsula).
Fig. 3 in A new vesselless angiosperm stem with a cambial variant from the Upper Cretaceous of Antarctica
Fig. 3. SEM images of the secondary xylem of the chloranthacean angiosperm Sarcandraxylon sanjosense gen. et sp. nov. (IAA-Pb 621), San José Pass, Antarctica, early–middle Campanian. A. Transverse section of the stem, showing one vascular bundle in the middle, pith toward the right, white arrows pointing uniseriate fascicular rays. B. Parenchymatic cells of an interfascicular ray in transverse section showing the main shape and piritization of the cell walls. C. Secondary xylem in longitudinal tangential section, showing fascicular xylem (fx) and interfascicular rays (ir). D. Longitudinal section of fascicular xylem; D1, showing tracheids and a two cells tall uniseriate ray (white arrow) with elongate upright cells; D2, detail showing cell walls partially replaced with framboidal pyrite (white arrow). Scale bars: A, D, 100 μm; B, 40 μm; C, 200 μm; E, 50 μm.
Fig. 2 in A new vesselless angiosperm stem with a cambial variant from the Upper Cretaceous of Antarctica
Fig. 2. Light micrographs of the stem of chloranthacean angiosperm Sarcandraxylon sanjosense gen. et sp. nov. (IAA-Pb 621), San José Pass, Antarctica, early–middle Campanian. A. Transverse section of the complete stem with pith, secondary xylem, phloem, and bark. B. Protoxylem (black arrow) and metaxylem (white arrow) in a vascular bundle. C. Secondary xylem in transverse section, pith in the left (white arrow), two interfascicular rays and fascicular secondary xylem (fx) intercalated. White arrow pointing uniseriate fascicular ray. D. Detail of bark and secondary phloem. Note phloem with AVES pattern as well. Phloem cells not preserved (p) and phloem fibers cap (black double head arrow) separated by interfascicular rays (ir). Bark (white double head arrow) with a continued thickened layer, forming shallow ribs. E. Tangential section of the stem, arrows pointing fascicular uniseriate rays; at both sides interfascicular rays (ir). Scale bars: 50 μm; except A, 1 mm.
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
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DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
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.