[en] The histology of sauropod long bones often appears uniform and conservative along their evolutionary tree. One of the main aspects of their bone histology isto exhibit a fibrolamellar complex in the cortex of their long bones. Here, we report another bone tissue, the radial fibrolamellar bone (RFB), in the outercortex of the humeri of a young adult cf. Isanosaurus(Early to Late Jurassic,Thailand) and an adult Spinophorosaurus nigerensis (Early to Middle Jurassic, Niger) that do not exhibit any pathological feature on the bone surface. Its location within the cortex is unexpected, because RFB is a rapidly deposited bone tissue that would rather be expected early in the ontogeny. A palaeopathological survey was conducted for these sampled specimens. Observed RFB occurrences are regarded as spiculated periosteal reactive bone, which is an aggressive form of periosteal reaction. A ‘hair-on-end’ pattern of neoplasmic origin (resembling a Ewing’s sarcoma) is favoured for cf. Isanosaurus, while a sunburst pattern of viral or neoplasmic origin (resembling an avian osteopetrosis or haemangioma) is favoured for Spinophorosaurus. This study highlights the importance of bone histology in assessing the frequency and nature of palaeopathologies.
Research center :
EDDyLab (ULiège), AMGC (VUB)
Disciplines :
Earth sciences & physical geography Veterinary medicine & animal health
Author, co-author :
Jentgen, Benjamin ; Université de Liège - ULiège > Département de géologie > Evolution and diversity dynamics lab
Stein, Koen ; Vrije Universiteit Brussel - VUB > Chemistry Department > Analytical, Environmental and Geo-Chemistry - AMGC
Fischer, Valentin ; Université de Liège - ULiège > Département de géologie > Evolution and diversity dynamics lab
Language :
English
Title :
Case study of radial fibrolamellar bone tissues in the outer cortex of basal sauropods
Alternative titles :
[fr] Cas d'étude de tissu osseux radial fibrolamellaire dans le cortex externe de sauropodes basaux
Publication date :
13 January 2020
Journal title :
Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
ISSN :
0962-8436
eISSN :
1471-2970
Publisher :
The Royal Society, London, United Kingdom
Special issue title :
Vertebrate palaeophysiology
Volume :
375
Issue :
20190143
Pages :
1-12
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
FRIA - Fonds pour la Formation à la Recherche dans l'Industrie et dans l'Agriculture [BE]
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