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Varanopidae : ウィキペディア英語版
Varanopidae

Varanopidae is an extinct family of synapsid "pelycosaurs" that resembled monitor lizards and might have had the same lifestyle, hence their name. Like many other pelycosaur families, they evolved from an ''Archaeothyris''-like synapsid in the Late Carboniferous; they had become extinct by the end of the Middle Permian. A varanopid from the latest Middle Permian ''Pristerognathus'' Assemblage Zone is the youngest known varanopid and the last member of the "pelycosaur" group of synapsids.
==Characteristics==
No known varanopids developed a sail like ''Dimetrodon''. The length of known varanopids, including the tail, varies from 1 to 2 meters (3 ft 4 in to 6 ft 7 in). Varanopids already showed some advanced characteristics of true pelycosaurs such as their deep, narrow, elongated skulls. Their jaws were long and their teeth were sharp. However, they were still primitive by mammalian standards. They had long tails, lizard-like body, and thin legs. The varanopids were mostly carnivorous, but as they were reduced in size, their diets changed from a carnivorous to an insectivorous lifestyle. Compared to the other animals in Early Permian, varanopids were agile creatures.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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