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Histology of Dvinosaurus campbelli (Temnospondyli, Dvinosauria) from the Late Permian Locality Gorokhovets, Vladimir Region

Authors
  • Uliakhin, A. V.1, 2
  • Skutschas, P. P.3
  • Saburov, P. G.3
  • 1 Moscow State University, Moscow, 119992, Russia , Moscow (Russia)
  • 2 Borissiak Paleontological Institute, Russian Academy of Sciences, Moscow, 117647, Russia , Moscow (Russia)
  • 3 St. Petersburg State University, St. Petersburg, 199034, Russia , St. Petersburg (Russia)
Type
Published Article
Journal
Paleontological Journal
Publisher
Pleiades Publishing
Publication Date
Nov 23, 2020
Volume
54
Issue
6
Pages
632–639
Identifiers
DOI: 10.1134/S0031030120060106
Source
Springer Nature
Keywords
License
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Abstract

AbstractThis study describes the microanatomical and histological structure of the femur and hypocentra of the neotenic temnospondyl amphibian Dvinosaurus campbelli from the Late Permian locality Gorokhovets, Vladimir Region (Upper Vyatkian Substage, subzone Chroniosuchus paradoxus of the Scutosaurus karpinskii zone). The femur of D. campbelli is characterized by a “pachyosteous” structure (dense thick periosteal cortex in the diaphysis) and a large number of growth marks (about 57); the hypocentrum has an “osteoporotic” structure. The neotenic nature of D. campbelli is confirmed by the presence of unresorbed cartilage in the skeletal elements of large-sized forms. Microanatomical and morphological features indicate that D. campbelli was an ambush feeder (using concealment during hunting).

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