Gymnophiona

Caecilians (; ) are a group of limbless, worm-shaped or snake-shaped amphibians, with either small eyes or no eyes, comprising the order Gymnophiona. They mostly live hidden in soil or in streambeds, making them some of the least familiar amphibians. Modern caecilians live in the tropics of South and Central America, Africa, and southern Asia. Caecilians feed on small subterranean creatures, such as earthworms. The body is noodle-like and often dark in colour, and the skull is bullet-shaped and strongly built. Caecilian heads have several unique adaptations, such as fused skull and jaw bones,

Eocaecilia is an extinct genus of gymnophionan amphibian from the early Jurassic Kayenta Formation of Arizona, United States. One species is described, Eocaecilia micropodia.

Rubricacaecilia ("Red Earth Caecilian") is an extinct genus of caecilian (limbless amphibian) from the Berriasian aged Ksar Metlili Formation in Morocco. The genus contains a single species, Rubricacaecilia monbaroni, Named for geologist M. monbaron. It is known from a nearly complete pseudodentary bone, several fragmentary pseudodentaries, a partial pseudangular, a partial palatine, an atlas, and vertebrae.