| 词条 | Plestiodon tetragrammus |
| 释义 |
| status = LC | status_system = IUCN3.1 | status_ref = [1] | name = Four-lined skink | image = | genus = Plestiodon | species = tetragrammus | authority = Baird, 1859 | range_map = Plestiodon tetragrammus distribution.png | synonyms =
}} The four-lined skink (Plestiodon tetragrammus)[2] is a species of lizard, which is endemic to North America. It is a medium-sized member of the Plestiodon skinks. TaxonomyAt least two subspecies are recognized, including the nominotypical subspecies:
Some herpetologists also consider the mountain skink (Plestiodon callicephalus) to be a subspecies of Plestiodon tetragrammus under the name P. t. callicephalus. Others, however, prefer to treat the mountain skink as a distinct species because its range is geographically distinct and there are morphological differences. DescriptionThe two subspecies can be distinguished by their color and their stripes. The long-lined skink is gray to light brown in color and has light stripes from the eyes extending to beyond its forelegs, whereas the short-lined skink is darker in color and has stripes that end before the forelegs. Juveniles of both subspecies have — like many Plestiodon — a blue tail; this color fades with age. Adults reach a maximum SVL (Snout-Vent-Length) of some 7.5 cm (about 3 inches), and a TL (total length) of about {{convert|18|cm|in|abbr=on}}. Geographic rangePlestiodon tetragrammus occurs in northern Mexico and along the Mexican Gulf coast and in western and central Texas. HabitatBoth subspecies live in lightly wooded areas, with the short-lined skink having a preference for rocky areas, whereas the long-lined skink is also found in grasslands. ReproductionThe female lays about 5 to 12 eggs once a year, which she broods. Males develop orange (short-lined skink) to red (long-lined skink) coloration of the head during the breeding season. References1. ^{{Cite journal | author = Hammerson, G.A. | author2 = Lavin, P. | author3 = Mendoza-Quijano, F. | last-author-amp = yes | title = Plestiodon tetragrammus | journal = The IUCN Red List of Threatened Species | volume = 2007 | page = e.T64241A12757814 | publisher = IUCN | date = 2007 | url = http://www.iucnredlist.org/details/64241/0 | doi = 10.2305/IUCN.UK.2007.RLTS.T64241A12757814.en | access-date = 9 January 2018}} 2. ^Plestiodon tetragrammus, The Reptile Database Further reading
External links
4 : Plestiodon|Reptiles of Mexico|Reptiles of the United States|Reptiles described in 1859 |
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