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Fig. 5 in Femoral histology and growth patterns of the ceratopsian dinosaur Psittacosaurus sibiricus from the Early Cretaceous of Western Siberia
Fig. 5. Histological sections of femur KOKM 4652/16 of the ceratopsian dinosaur Psittacosaurus sibiricus Voronkevich and Averianov in Leshchinskiy et al., 2000, from the Lower Cretaceous Ilek Formation (Shestakovo 3 locality) of Western Siberia, Russia; juvenile stage, about 40–45% of maximal femoral size. Microanatomical overview (A1) and close-ups of the cortex under polarized light with lambda waveplate (A2, A3). Abbreviations: eb, erosion bays; lvc, longitudinal vascular canals; mc, medullary cavity; retvc, reticular vascular canals; sb, secondary bone.
Fig. 4 in Femoral histology and growth patterns of the ceratopsian dinosaur Psittacosaurus sibiricus from the Early Cretaceous of Western Siberia
Fig. 4. Histological sections of femur PM TSU 16/0-54 of the ceratopsian dinosaur Psittacosaurus sibiricus Voronkevich and Averianov in Leshchinskiy et al., 2000, from the Lower Cretaceous Ilek Formation (Shestakovo 3 locality) of Western Siberia, Russia; juvenile stage, about 30–35% of maximal femoral size. Microanatomical overview (A1) and close-ups of the cortex under polarized light with lambda waveplate (A2–A4). Abbreviations: eb, erosion bays; lvc, longitudinal vascular canals; mc, medullary cavity; pb, primary bone; retvc, reticular vascular canals; sb, secondary bone; so, secondary osteon.
Fig. 2 in Femoral histology and growth patterns of the ceratopsian dinosaur Psittacosaurus sibiricus from the Early Cretaceous of Western Siberia
Fig. 2. Histological sections of the smallest femur PM TSU 120-Sh3-125 (<20% of maximal femoral size) of the ceratopsian dinosaur Psittacosaurus sibiricus Voronkevich and Averianov in Leshchinskiy et al., 2000, from the Lower Cretaceous Ilek Formation (Shestakovo 3 locality) of Western Siberia, Russia; hatchling stage, under polarized light with lambda waveplate. Microanatomical (A1) and histological (A2) overview of the cortex showing primary highly vascularized bone. Note the presence of radial primary osteons and primary vascular canals. Close-up of the cortex, showing predominantly reticular orientation of the primary osteons and primary vascular canals (A3). Details of the composition of the primary bone tissues of the cortex (A4). Note the presence of the incipient fibrolamellar complex. Abbreviations: lvc, longitudinal vascular canals; mc, medullary cavity; pfb, parallel-fibered bone; po, primary osteon; radvc, radial vascular canals; retvc, reticular vascular canals; wb, woven bone.
Fig. 1 in Femoral histology and growth patterns of the ceratopsian dinosaur Psittacosaurus sibiricus from the Early Cretaceous of Western Siberia
Fig. 1. Diagrammatic outline of the femur of Psittacosaurus sibiricus Voronkevich and Averianov in Leshchinskiy et al., 2000, from the Lower Cretaceous Ilek Formation (Shestakovo 3 locality) of Western Siberia, Russia, indicating the relative positions of sections taken for histological examination. A. Sections taken from specimens from Paleontological Museum of Tomsk State University (PM TSU). B. Sections taken from specimens from Kuzbass State Museum of Local Lore (KOKM).
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. 8 in Comparative cranial osteology of subadult eucentrosauran ceratopsid dinosaurs from the Two Medicine Formation, Montana, indicates sequence of ornamentation development and complex supraorbital ontogenetic change
Fig. 8. Size comparison of squamosal versus face in Einiosaurus procurvicornis Sampson, 1995, subadult MOR 456 8-8-87-1 (A) and MOR 456 8-9-6-1, holotype (B, mirrored); squamosal superimposed in B. C. Outline of MOR 456 8-8-87-1 (red) superimposed over outline of MOR 456 8-9-6-1 (grey). D. Outline of MOR 591 (blue) superimposed over outline of MOR 456 8-9-6-1 (grey). Outlines aligned by otic notch.
Fig. 5 in Comparative cranial osteology of subadult eucentrosauran ceratopsid dinosaurs from the Two Medicine Formation, Montana, indicates sequence of ornamentation development and complex supraorbital ontogenetic change
Fig. 5. Lateral views of jugals of Einiosaurus procurvicornis Sampson, 1995, MOR 456 8-8-87-1 (A) and eucentrosauran (Einiosaurus procurvicornis or Achelousaurus horneri Sampson, 1995), MOR 591 (B, mirrored), from the Campanian Two Medicine Formation, Montana, USA. Arrow indicates epijugal.
Fig. 6 in Comparative cranial osteology of subadult eucentrosauran ceratopsid dinosaurs from the Two Medicine Formation, Montana, indicates sequence of ornamentation development and complex supraorbital ontogenetic change
Fig. 6. Ontogenetic series of supraorbital ornamentation of Einiosaurus procurvicornis Sampson, 1995 from the Campanian Canyon Bonebed, Two Medicine Formation (TM-046), Montana, USA. A, B. Juvenile, MOR 456 8-10-87-20 (A) and MOR 456 8-8-87-19 (B). C, D. Early subadult, MOR 456 8-9-7-3 (C) and MOR 456 2020-C-1 (D). E, F. Late subadult, MOR 456 8-8-87-1 (E) and MOR 456 8-23-87 (F). G, H. Young adult, MOR 456 2020-C-2 (G) and MOR 456 8-9-6-1 (H). B and D are mirrored. All specimens in anterior view, lateral is to the right in A–D, G, H; E, entire skull width; F, lateral is to the left.
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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)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
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.