Digital preparation and osteology of the skull of Lesothosaurus diagnosticus (Ornithischia: Dinosauria)

Several skulls of the ornithischian dinosaur Lesothosaurus diagnosticus (Lower Jurassic, southern Africa) are known, but all are either incomplete, deformed, or incompletely prepared. This has hampered attempts to provide a comprehensive description of skull osteology in this crucial early dinosauri...

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Published in:PeerJ (San Francisco, CA) Vol. 3; p. e1494
Main Authors: Porro, Laura B, Witmer, Lawrence M, Barrett, Paul M
Format: Journal Article
Language:English
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Abstract Several skulls of the ornithischian dinosaur Lesothosaurus diagnosticus (Lower Jurassic, southern Africa) are known, but all are either incomplete, deformed, or incompletely prepared. This has hampered attempts to provide a comprehensive description of skull osteology in this crucial early dinosaurian taxon. Using visualization software, computed tomographic scans of the Lesothosaurus syntypes were digitally segmented to remove matrix, and identify and separate individual cranial and mandibular bones, revealing new anatomical details such as sutural morphology and the presence of several previously undescribed elements. Together with visual inspection of exposed skull bones, these CT data enable a complete description of skull anatomy in this taxon. Comparisons with our new data suggest that two specimens previously identified as Lesothosaurus sp. (MNHN LES 17 and MNHN LES 18) probably represent additional individuals of Lesothosaurus diagnosticus.
AbstractList Several skulls of the ornithischian dinosaur Lesothosaurus diagnosticus (Lower Jurassic, southern Africa) are known, but all are either incomplete, deformed, or incompletely prepared. This has hampered attempts to provide a comprehensive description of skull osteology in this crucial early dinosaurian taxon. Using visualization software, computed tomographic scans of the Lesothosaurus syntypes were digitally segmented to remove matrix, and identify and separate individual cranial and mandibular bones, revealing new anatomical details such as sutural morphology and the presence of several previously undescribed elements. Together with visual inspection of exposed skull bones, these CT data enable a complete description of skull anatomy in this taxon. Comparisons with our new data suggest that two specimens previously identified as Lesothosaurus sp. (MNHN LES 17 and MNHN LES 18) probably represent additional individuals of Lesothosaurus diagnosticus.
Several skulls of the ornithischian dinosaur Lesothosaurus diagnosticus (Lower Jurassic, southern Africa) are known, but all are either incomplete, deformed, or incompletely prepared. This has hampered attempts to provide a comprehensive description of skull osteology in this crucial early dinosaurian taxon. Using visualization software, computed tomographic scans of the Lesothosaurus syntypes were digitally segmented to remove matrix, and identify and separate individual cranial and mandibular bones, revealing new anatomical details such as sutural morphology and the presence of several previously undescribed elements. Together with visual inspection of exposed skull bones, these CT data enable a complete description of skull anatomy in this taxon. Comparisons with our new data suggest that two specimens previously identified as Lesothosaurus sp. (MNHN LES 17 and MNHN LES 18) probably represent additional individuals of Lesothosaurus diagnosticus .
ArticleNumber e1494
Audience Academic
Author Barrett, Paul M
Witmer, Lawrence M
Porro, Laura B
Author_xml – sequence: 1
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  surname: Porro
  fullname: Porro, Laura B
  organization: Department of Comparative Biomedical Sciences, Royal Veterinary College , Hatfield , United Kingdom
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  givenname: Lawrence M
  surname: Witmer
  fullname: Witmer, Lawrence M
  organization: Department of Biomedical Sciences, Heritage College of Osteopathic Medicine, Ohio University , Athens, OH , United States
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  givenname: Paul M
  surname: Barrett
  fullname: Barrett, Paul M
  organization: Department of Earth Sciences, Natural History Museum , London , United Kingdom
BackLink https://www.ncbi.nlm.nih.gov/pubmed/26713245$$D View this record in MEDLINE/PubMed
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Lower jaw
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Anatomy
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Snippet Several skulls of the ornithischian dinosaur Lesothosaurus diagnosticus (Lower Jurassic, southern Africa) are known, but all are either incomplete, deformed,...
Several skulls of the ornithischian dinosaur Lesothosaurus diagnosticus (Lower Jurassic, southern Africa) are known, but all are either incomplete, deformed,...
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StartPage e1494
SubjectTerms Anatomy
Anatomy and Physiology
Animal behavior
Birds
Computational Biology
Computed tomography
Cranium
Dinosauria
Dinosaurs
Evolution
Heterodontosaurus
Jurassic period
Lesothosaurus
Lower jaw
Mandible
Morphology
Ornithischia
Paleontology
Pisanosaurus
Skull
Taxonomy
Technology application
Theropoda
Visualization
Visualization (Computer)
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Title Digital preparation and osteology of the skull of Lesothosaurus diagnosticus (Ornithischia: Dinosauria)
URI https://www.ncbi.nlm.nih.gov/pubmed/26713245
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