Osseous anomalies of the cryptobranchid Eoscapherpeton asiaticum (Amphibia

Caudata) from the Late Cretaceous of Uzbekistan

Pavel Skutschas, Veniamin Kolchanov, Elizaveta Boitsova, Ivan Kuzmin

Research outputpeer-review

1 Citation (Scopus)

Abstract

Osseous anomalies/pathologies in the Late Cretaceous cryptobranchid salamander Eoscapherpeton asiaticum from the Turonian Bissekty Formation of Uzbekistan are analyzed using gross morphological description, microCT, and histologic analysis. These pathologies result from trauma (fractured and subsequently healed dentary and femora; hematoma on femur), possible infection due to trauma (prearticular with exostosis and necrotic cavities; anterior trunk vertebra and fused vertebra with pathological enlargements formed during reactive periosteal growth) and congenital disorders (hemivertebra and fused vertebrae with shortened asymmetrical centra and abnormal arrangements of transverse processes). The origin of the pathologies of two atlantal specimens (enlargement of transverse processes) is unclear. Our report of hemivertebra in Eoscapherpeton is the first occurrence of this congenital pathology in a fossil lissamphibian. The occurrence of several traumatic femoral pathologies in Eoscapherpeton could be a result of intraspecific aggressive behavior. Bone pathologies are described for the first time in fossil salamanders.

Original languageEnglish
Pages (from-to)159-169
Number of pages11
JournalFossil Record
Volume21
Issue number1
DOIs
Publication statusPublished - 27 Apr 2018

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pathology
Cretaceous
anomaly
fossil
Turonian
bone
cavity

Scopus subject areas

  • Paleontology

Cite this

Skutschas, Pavel ; Kolchanov, Veniamin ; Boitsova, Elizaveta ; Kuzmin, Ivan. / Osseous anomalies of the cryptobranchid Eoscapherpeton asiaticum (Amphibia : Caudata) from the Late Cretaceous of Uzbekistan. In: Fossil Record. 2018 ; Vol. 21, No. 1. pp. 159-169.
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abstract = "Osseous anomalies/pathologies in the Late Cretaceous cryptobranchid salamander Eoscapherpeton asiaticum from the Turonian Bissekty Formation of Uzbekistan are analyzed using gross morphological description, microCT, and histologic analysis. These pathologies result from trauma (fractured and subsequently healed dentary and femora; hematoma on femur), possible infection due to trauma (prearticular with exostosis and necrotic cavities; anterior trunk vertebra and fused vertebra with pathological enlargements formed during reactive periosteal growth) and congenital disorders (hemivertebra and fused vertebrae with shortened asymmetrical centra and abnormal arrangements of transverse processes). The origin of the pathologies of two atlantal specimens (enlargement of transverse processes) is unclear. Our report of hemivertebra in Eoscapherpeton is the first occurrence of this congenital pathology in a fossil lissamphibian. The occurrence of several traumatic femoral pathologies in Eoscapherpeton could be a result of intraspecific aggressive behavior. Bone pathologies are described for the first time in fossil salamanders.",
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Osseous anomalies of the cryptobranchid Eoscapherpeton asiaticum (Amphibia : Caudata) from the Late Cretaceous of Uzbekistan. / Skutschas, Pavel; Kolchanov, Veniamin; Boitsova, Elizaveta; Kuzmin, Ivan.

In: Fossil Record, Vol. 21, No. 1, 27.04.2018, p. 159-169.

Research outputpeer-review

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