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lysorophia
Lysorophia is an order of aquatic Carboniferous and Permian amphibians within the extinct subclass Lepospondyli. Lysorophians resembled small snakes, as their bodies are extremely elongate. There is a single family, the Cocytinidae (previously known as Lysorophidae). Currently there are around five genera included within Lysorophia.
== Description ==
The skull is lightly built and open, with large orbits and fenestrae. The intertemporal, supratemporal, postfrontal, and jugal bones of the skull have disappeared. The mandibles are short, and the maxilla and premaxilla freely movable.
The torso is very elongate, the limbs diminutive or absent, and the tail short. There are up to 99 pre-sacral (i.e. not including the hips and tail) vertebrae.
Based on morphology of the cranio-vertebral articulation, Lysorophids are usually considered to be related to the Microsauria, although the pattern of bones of the skull is very different.
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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