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Leptotyphlops humilis : ウィキペディア英語版 | Leptotyphlops humilis
:''Common names: western slender blind snake, western threadsnake, more.'' ''Leptotyphlops humilis'' is a blind snake species endemic to the southwestern United States and northern Mexico. Nine subspecies are currently recognized, including the nominate subspecies described here.〔 ==Description== This species, like many of the others in this family, resembles a long earthworm. It lives underground in burrows, and since it has no use for vision, its eyes are mostly vestigial. The western blind snake is pink, purple, or silvery-brown in color, shiny, wormlike, cylindrical, and blunt at both ends, and has light-detecting black eyespots. The snake's skull is thick to permit burrowing, and it has a spine at the end of its tail that it uses for leverage. It is usually less than in total length (tail included), and is as thin as an earthworm. This species and other blind snakes are fluorescent under low frequency ultraviolet light (black light).〔Hulse AC. 1971. Fluoresence in ''Leptotyphlops humilis'' (Serpentes: Leptotyphlopidae). ''The Southwestern Naturalist'' 16 (1): 123-124. 〕 On the top of the head, between the ocular scales, ''L. humilis'' has only one scale (''L. dulcis'' has three scales).〔Smith HM, Brodie ED Jr. 1982. ''Reptiles of North America: A Guide to Field Identification''. New York: Golden Press. 240 pp. ISBN 0-307-13666-3. (''Leptotyphlops humilis'', pp. 136-137).〕
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