出典(authority):フリー百科事典『ウィキペディア(Wikipedia)』「2013/10/10 19:45:01」(JST)
Leptotyphlops humilis | |
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Scientific classification | |
Kingdom: | Animalia |
Phylum: | Chordata |
Subphylum: | Vertebrata |
Class: | Reptilia |
Order: | Squamata |
Suborder: | Serpentes |
Family: | Leptotyphlopidae |
Genus: | Leptotyphlops |
Species: | L. humilis |
Binomial name | |
Leptotyphlops humilis (Baird & Girard, 1853) |
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Synonyms | |
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Leptotyphlops humilis is a blind snake species found in the southwestern United States and northern Mexico. Nine subspecies are currently recognized, including the nominate subspecies described here.[2]
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 30 cm (12 in) in length, and is as thin as an earthworm. This species and other blind snakes are fluorescent under low frequency ultraviolet light (black light).[3]
On the top of the head, between the ocular scales, L. humilis has only one scale (L. dulcis has three scales).[4]
Western slender blind snake, western threadsnake,[2] western blind snake.
Found in the southwestern United States, South Florida and northern Mexico. In the US it ranges from southwestern and Trans-Pecos Texas west through southern and central Arizona, southern Nevada, southwestern Utah and southern California. In Mexico its distribution includes Baja California, Sonora, Sinaloa, Nayarit, Jalisco, Colima, Chihuahua, Durango, Coahuila, Tamaulipas and San Luis Potosí. The type locality given is "Valliecitas, Cal." The type locality was restricted by Klauber (1931) to "vicinity of Vallecito, eastern San Diego County, California," and by Brattstrom (1953) to "the Uppers Sonoran Life Zone of the Vallecito area."[1]
The snake lives underground, sometimes as deep as 20 metres (66 ft), and is known to invade ant and termite nests. Its diet is made up mostly of insects and their larvae and eggs. It is found in deserts and scrub where the soil is loose enough to work.
Subspecies[2] | Authority[2] | Common name[2] | Geographic range |
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L. h. boettgeri | (Werner, 1899) | ||
L. h. cahuilae | Klauber, 1931 | Desert blind snake | |
L. h. dugesii | (Bocourt, 1881) | ||
L. h. humilis | (Baird & Girard, 1853) | Southwestern blind snake | |
L. h. levitoni | Murphy, 1975 | ||
L. h. lindsayi | Murphy, 1975 | ||
L. h. segregus | Klauber, 1939 | Trans-Pecos blind snake | |
L. h. tenuiculus | (Garman, 1884) | ||
L. h. utahensis | V.Tanner, 1938 | Utah blind snake |
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関連記事 | 「western」「blind」「snake」「blinded」 |
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