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307 results for “Ornithischia”
FIG. 27 in The Osteology Of Haya Griva (Dinosauria: Ornithischia) From The Late Cretaceous Of Mongolia
FIG. 27. Postcranial skeleton of Haya griva, IGM 100/2015. Abbreviations in appendix 1.
FIG. 20 in The Osteology Of Haya Griva (Dinosauria: Ornithischia) From The Late Cretaceous Of Mongolia
FIG. 20. Otic region of IGM 100/2014. Abbreviations in appendix 1.
FIG. 1 in The Osteology Of Haya Griva (Dinosauria: Ornithischia) From The Late Cretaceous Of Mongolia
FIG. 1. Map of Mongolia showing the Khugenetslavkant and Zos Canyon localities.
FIG. 19 in The Osteology Of Haya Griva (Dinosauria: Ornithischia) From The Late Cretaceous Of Mongolia
FIG. 19. Braincase of IGM 100/2019 in oblique right lateral view. Abbreviations in appendix 1.
FIG. 12 in The Osteology Of Haya Griva (Dinosauria: Ornithischia) From The Late Cretaceous Of Mongolia
FIG. 12. Skull of Haya griva, IGM 100/3557 in dorsal view. Abbreviations in appendix 1.
FIGURE 16 in The Osteology Of Haya Griva (Dinosauria: Ornithischia) From The Late Cretaceous Of Mongolia
FIGURE 16. Troodontid tooth found in matrix from the IGM 100/3672 jacket.
FIG. 7 in The Osteology Of Haya Griva (Dinosauria: Ornithischia) From The Late Cretaceous Of Mongolia
FIG. 7. Skull of Haya griva, IGM 100/3178, in left lateral view. Abbreviations in appendix 1.
Data from: Individual, ontogenetic, and phylogenetic variation in the dentition of hadrosaurids (Iguanodontia: Ornithischia)
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Supplementary photographs from: The Canadian fossil record supports anagenesis in Triceratops (Ornithischia, Ceratopsia)
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Data from: Body mass estimates of an exceptionally complete Stegosaurus (Ornithischia: Thyreophora): comparing volumetric and linear bivariate mass estimation methods
Body mass is a key biological variable, but difficult to assess from fossils. Various techniques exist for estimating body mass from skeletal parameters, but few studies have compared outputs from different methods. Here, we apply several mass estimation methods to an exceptionally complete skeleton of the dinosaur Stegosaurus. Applying a volumetric convex-hulling technique to a digital model of Stegosaurus, we estimate a mass of 1560 kg (95% prediction interval 1082–2256 kg) for this individual. By contrast, bivariate equations based on limb dimensions predict values between 2355 and 3751 kg and require implausible amounts of soft tissue and/or high body densities. When corrected for ontogenetic scaling, however, volumetric and linear equations are brought into close agreement. Our results raise concerns regarding the application of predictive equations to extinct taxa with no living analogues in terms of overall morphology and highlight the sensitivity of bivariate predictive equations to the ontogenetic status of the specimen. We emphasize the significance of rare, complete fossil skeletons in validating widely applied mass estimation equations based on incomplete skeletal material and stress the importance of accurately determining specimen age prior to further analyses.
Data from: Postcrania of juvenile Pinacosaurus grangeri (Ornithischia: Ankylosauria) from the Upper Cretaceous Alagteeg Formation, Alag Teeg, Mongolia: implications for ontogenetic allometry in ankylosaurs
The ankylosaurine Pinacosaurus is one of the best known ankylosaur to date in terms of the number and preservational quality of specimens. Juvenile to sub-adult postcrania collected by the Soviet-Mongolian Paleontological Expedition from the Upper Cretaceous Alagteeg Formation at Alag Teeg, Mongolia can be assigned to Pinacosaurus grangeri based on discrete cranial characters. One individual is significantly larger than the others and demonstrates delayed fusion of postcranial elements with the earliest occurring between dorsal ribs and vertebrae. The robustness of forelimb elements is positively allometric with respect to their length, indicating weight-bearing relationship. Such length-dependent correlations are not seen in the hind limbs. Finally, incipient cervical half rings suggest a developmental pathway of outgrowths from the underlying band combined with fusion of overlying osteoderms.
FIGURE 9. Strict component consensus tree obtained following a in Cranial anatomy of Jeholosaurus shangyuanensis (Dinosauria: Ornithischia) from the Early Cretaceous of China
FIGURE 9. Strict component consensus tree obtained following a posteriori deletion of Talenkauen, Yandusaurus and Zephyrosaurus. Numbers at nodes indicate bootstrap proportions> 50% (1,000 replicates). See text for further details.
FIGURE 8 in Cranial anatomy of Jeholosaurus shangyuanensis (Dinosauria: Ornithischia) from the Early Cretaceous of China
FIGURE 8. Referred specimens of Jeholosaurus shangyuanensis. A–D, IVPP V15718. E–F, IVPP V15719. A, F, right lateral view, B, dorsal view, C, E, ventral view and D, caudal view. Scale bars = 20 mm.
FIGURE 7 in Cranial anatomy of Jeholosaurus shangyuanensis (Dinosauria: Ornithischia) from the Early Cretaceous of China
FIGURE 7. Referred skull and mandible of Jeholosaurus shangyuanensis (IVPP V15717) A, dorsal, B, ventral and C,
FIGURE 6 in Cranial anatomy of Jeholosaurus shangyuanensis (Dinosauria: Ornithischia) from the Early Cretaceous of China
FIGURE 6. Outline drawing of the referred skull and mandible of Jeholosaurus shangyuanensis (IVPP V15716) in right lateral view. Abbreviations: an, angular; aof, antorbital fossa; aofo, antorbital fenestra; d, dentary; epi, epipterygoid; j, jugal; l, lachrymal; mx, maxilla; mxt, maxillary teeth; n, nasal; nf, nasal foramina; orn, ornamentation; pb, palpebral; pd, predentary; pf, prefrontal; pmx, premaxilla; po, postorbital; q, quadrate; qj, quadratojugal; qjf, quadratojugal foramen; sa, surangular; sq, squamosal; st, stapes.
FIGURE 5 in Cranial anatomy of Jeholosaurus shangyuanensis (Dinosauria: Ornithischia) from the Early Cretaceous of China
FIGURE 5. Referred skull and mandible of Jeholosaurus shangyuanensis (IVPP V15716) in right lateral view. A, whole specimen and B, close up on jugal to illustrate its nodular ornamentation. Scale bars = 20 mm (A) and 10 mm (B).
FIGURE 4 in Cranial anatomy of Jeholosaurus shangyuanensis (Dinosauria: Ornithischia) from the Early Cretaceous of China
FIGURE 4. Outline drawing of a referred specimen of Jeholosaurus shangyuanensis (IVPP V12530) in right lateral view. Abbreviations: an, angular; aof, antorbital fossa; cb, ceratobranchials; d, dentary; f, frontal; j, jugal; l, lachrymal; mx, maxilla; mxt, maxillary teeth; n, nasal; nd, nasal depression; nf, nasal foramina; pa, parietal; pf, prefrontal; pmx, premaxilla; po, postorbital; pr, prearticular; pt, pterygoid; q, quadrate; qj, quadratojugal; qjf, quadratojugal foramen; sa, surangular. Grey shaded area represents matrix.
FIGURE 3 in Cranial anatomy of Jeholosaurus shangyuanensis (Dinosauria: Ornithischia) from the Early Cretaceous of China
FIGURE 3. Referred skull and mandible of Jeholosaurus shangyuanensis (IVPP V12530) in right lateral view. A, whole skull and B, close up on snout to illustrate the line of foramina that perforates the nasal (individual foramina are marked with an arrow). Scale bars = 20 mm (A) and 5 mm (B).
FIGURE 2 in Cranial anatomy of Jeholosaurus shangyuanensis (Dinosauria: Ornithischia) from the Early Cretaceous of China
FIGURE 2. Outline drawings of the holotype skull of Jeholosaurus shangyuanensis (IVPP V12529) in A, dorsal and B, ventral views. Abbreviations: an, angular; aof, antorbital fossa; bo, basioccipital; bs, basisphenoid; cr, cervical rib; d, dentary; ect, ectopterygoid; en, endocast; epi, epipterygoid; ex, exoccipital/opisthotic; f, frontal; j, jugal; l, lachrymal; lpt, left pterygoid; mx, maxilla; mxt, maxillary teeth; n.a, articular surface for nasal; pa, parietal; pal, palatine; pd, predentary; pf.a, articular surface for prefrontal; pmx, premaxilla; po, postorbital; pr, prearticular; pt, pterygoid; q, quadrate; qj, quadratojugal; rpt, right pterygoid; sa, surangular; sp, splenial; sq, squamosal; XII, foramen for exit of cranial nerve XII.
FIGURE 1 in Cranial anatomy of Jeholosaurus shangyuanensis (Dinosauria: Ornithischia) from the Early Cretaceous of China
FIGURE 1. Holotype skull and mandibles of Jeholosaurus shangyuanensis (IVPP V12529) in A, dorsal, B, ventral and C, left lateral views. D, close up on left maxillary tooth row. Scale bars = 20 mm (A–C) and 10 mm (D).
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Allen Brain Atlas
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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
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