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Sunbeam snake (Xenopeltis unicolor) Scolecophidia 3 families Family Common Names Example Species Example Photo Anomalepidae Taylor, 1939: Dawn blind snakes: Dawn blind snake (Liotyphlops beui) Leptotyphlopidae Stejneger, 1892: Slender blind snakes: Texas blind snake (Leptotyphlops dulcis) Typhlopidae Merrem, 1820: Blind snakes
A = Anapsid, B = Synapsid, C = Diapsid. It was traditionally assumed that first reptiles were anapsids, having a solid skull with holes only for the nose, eyes, spinal cord, etc.; [10] the discoveries of synapsid-like openings in the skull roof of the skulls of several members of Parareptilia, including lanthanosuchoids, millerettids, bolosaurids, some nycteroleterids, some procolophonoids and ...
There is a third family containing the opistoglyphous (rear-fanged) snakes (as well as the majority of other snake species): Colubrids – boomslangs , tree snakes , vine snakes , cat snakes , although not all colubrids are venomous.
Colubridae (/ k ə ˈ l uː b r ɪ d iː /, commonly known as colubrids / ˈ k ɒ lj ʊ b r ɪ d z /, from Latin: coluber, 'snake') is a family of snakes. With 249 genera, [2] it is the largest snake family. The earliest fossil species of the family date back to the Late Eocene epoch, with earlier origins suspected. [1]
The evolution of tetrapods began about 400 million years ago in the Devonian Period with the earliest tetrapods evolved from lobe-finned fishes. [1] Tetrapods (under the apomorphy-based definition used on this page) are categorized as animals in the biological superclass Tetrapoda, which includes all living and extinct amphibians, reptiles, birds, and mammals.
Madtsoiidae is an extinct family of mostly Gondwanan snakes with a fossil record extending from early Cenomanian (Upper Cretaceous) to late Pleistocene strata located in South America, Africa, India, Australia and Southern Europe.
An early fossil snake, Najash rionegrina, was a two-legged burrowing animal with a sacrum, and was fully terrestrial. [14] One extant analog of these putative ancestors is the earless monitor Lanthanotus of Borneo (though it also is semiaquatic). [15] Subterranean species evolved bodies streamlined for burrowing, and eventually lost their limbs ...
The snake elements were described as those of a novel, giant boid snake that they named Titanoboa cerrejonensis. The genus name derives from the Greek word "Titan" in addition to Boa, the type genus of the family Boidae. The species name is a reference to the Cerrejón region it is known from.