limbless amphibians

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• Limbless vertebrates — Many vertebrates have evolved limbless forms. Reptiles have on a number of occasions evolved into limbless forms snakes, amphisbaenia, and legless lizards (limb loss in lizards has evolved independently several times). The same is true of… …   Wikipedia

• Gymnophiona — ▪ amphibian Introduction also called  Apoda   one of the three major extant orders of the class Amphibia. Its members are known as caecilians (caecilian), a name derived from the Latin word caecus, meaning “sightless” or “blind.” The majority of… …   Universalium

• Aistopoda —   Aistopoda Rango temporal: Carbonífero Inferior Pérmico Inferior …   Wikipedia Español

• Ophiderpeton —   Ophiderpeton Rango temporal: Carbonífero superior …   Wikipedia Español

• caecilian — noun Etymology: ultimately from Latin caecilia slowworm, from caecus blind Date: circa 1879 any of an order (Gymnophiona) of chiefly tropical burrowing limbless amphibians resembling worms • caecilian adjective …   New Collegiate Dictionary

• Ichthyophis — Taxobox | name = Ichthyophis regnum = Animalia phylum = Chordata subphylum = Vertebrata classis = Amphibia subclassis = Lissamphibia ordo = Gymnophiona familia = Ichthyophiidae genus = Ichthyophis genus authority = Fitzinger, 1826 subdivision… …   Wikipedia

• lizard — /liz euhrd/, n. 1. any of numerous scaly reptiles of the suborder Sauria, order Squamata, typically having a moderately elongate body, a tapering tail, and two pairs of legs held outward from the body, comprising mostly terrestrial and burrowing… …   Universalium

• amphibian — /am fib ee euhn/, n. 1. any cold blooded vertebrate of the class Amphibia, comprising frogs and toads, newts and salamanders, and caecilians, the larvae being typically aquatic, breathing by gills, and the adults being typically semiterrestrial,… …   Universalium

• reptile — reptilelike, adj. reptiloid /rep tl oyd /, adj. /rep til, tuyl/, n. 1. any cold blooded vertebrate of the class Reptilia, comprising the turtles, snakes, lizards, crocodilians, amphisbaenians, tuatara, and various extinct members including the… …   Universalium

• Terrestrial locomotion — [ horse an erect stanced unguligrade quadruped with a galloping gait. An animation of photos by Eadweard Muybridge] Terrestrial locomotion has evolved as animals adapted from aquatic to terrestrial environments. Locomotion on land raises… …   Wikipedia

• locomotion — /loh keuh moh sheuhn/, n. the act or power of moving from place to place. [1640 50; see LOCOMOTIVE, MOTION] * * * Any of various animal movements that result in progression from one place to another. Locomotion is classified as either… …   Universalium