Histology of Dvinosaurus campbelli (Temnospondyli, Dvinosauria) from the Late Permian Locality Gorokhovets, Vladimir Regionстатья
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Дата последнего поиска статьи во внешних источниках: 30 декабря 2020 г.
Аннотация:This study describes the microanatomical and histological structure of the femur and hypocentra of the neotenic temnospondyl amphibian Dvinosaurus campbelli from the Late Permian locality Gorok-hovets, 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 peri-osteal cortex in the diaphysis) and a large number of growth marks (about 57); the hypocentrum has an "oste-oporotic" 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).