Phygon

Phygons are members of the family Phygonidae and order Introcubita. They are recognisable by their small lower ears, low-hunched stature, three forward-facing toes on each foot, short, stiff tails and, most distinctively, unique muscles on top of the head used to erect one or multiple crests.

Etymology
The term "phygon" is an anglicisation of the Nical term, pronounced fy-gun. This itself comes from the Ponutugika word "paigra".

Taxonomy
Phygonidae contains two subfamilies:

Phygoninae
The 'typical' phygons have elbows held underneath their bodies and have fairly blunt snouts.

Rsogupinae
From the Nical "rsogup" (r-gos-uup), meaning a crawl in reference to this group's low-slung posture. Rsogupins, also called crawlers or forest phygons, have elbows which are held to their sides, as well as flat, frog-like heads and outward-angled outer tows on the hind feet.

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Move to own family:

Arboropumilinae
These phygons are small and arboreal. They have roughly conical skulls, tapering to the snout, with elbows held out to the sides of the body and elongated hands and feet featuring longer toes and, often, elongate or pointed heels. They also feature longer tails, though these are still stiff.