Abstract

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 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).

中文翻译：

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弗拉基米尔地区二叠纪晚期Gorokhovets的Dvinosaurus campbelli（Temnospondyli，Dvinosauria）的组织学

摘要

这项研究描述了来自弗拉基米尔地区二叠纪晚期Gorokhovets（上部Vyatkian子阶段，Scutosaurus karpinskiskius的Chroniosuchus paradoxus子区）的新二叠纪的两栖类两栖动物Dvinosaurus campbelli的股骨和下丘的显微解剖学和组织学结构。坎贝利D. campbelli股骨的特征是“乳突骨”结构（骨干中密集的骨膜厚皮质）和大量的生长标记（约57个）。下丘脑具有“骨质疏松”结构。坎贝利D.大尺寸骨骼中未吸收的软骨证实了这一点。微观解剖学和形态学特征表明D. campbelli是伏击饲养者（狩猎时使用隐蔽物）。