| Four-lined skink | |
|---|---|
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| Plestiodon t. tetragrammus, municipality of Aldama, Tamaulipas, Mexico | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| Order: | Squamata |
| Family: | Scincidae |
| Genus: | Plestiodon |
| Species: | P. tetragrammus |
| Binomial name | |
| Plestiodon tetragrammus Baird, 1859 | |
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| Synonyms | |
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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.
At 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.
The 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 18 cm (7.1 in).
Plestiodon tetragrammus occurs in northern Mexico and along the Mexican Gulf coast and in western and central Texas.
Both 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.
The 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.
The Florida sand skink is a species of lizard in the family Scincidae, the skinks. It is endemic to Florida in the United States.
Plestiodon egregius, the mole skink, is a species of small lizard endemic to the Southeastern United States.
The western skink is a species of small, smooth-scaled lizard with relatively small limbs. It measures about 100 to 210 mm in total length. It is one of seven species of lizards in Canada. They spend much of their day basking in the sun. Their diet ranges widely, including spiders and beetles. Western skinks will bite if grasped and will flee if they feel threatened. It is a common but secretive species whose range extends from southern British Columbia and throughout Washington, Oregon, Nevada, Utah, Idaho, and Wyoming and into western Montana and northern Arizona and Missouri. They can also live in some areas of Texas It is widespread in northern California but primarily restricted to the coast in central and southern California. Found in a variety of habitats, this lizard is most common in early successional stages or open areas of late successional stages. Heavy brush and densely forested areas are generally avoided. Western skinks are found from sea level to at least 2,130 m (7,000 ft). This diurnal reptile is active during the warm seasons.
Plestiodon anthracinus, the coal skink, is a species of lizard which is endemic to North America.
The broad-headed skink or broadhead skink is species of lizard, endemic to the southeastern United States. The broadhead skink occurs in sympatry with the five-lined skink and Southeastern five-lined skink in forest of the Southeastern United States. All three species are phenotypically similar throughout much of their development and were considered a single species prior to the mid-1930s.
Plestiodon gilberti, commonly known as Gilbert's skink, is a species of heavy-bodied medium-sized lizard in the family Scincidae. The species is endemic to the southwestern United States, and grows to about 7 to 12 cm in total length.
The Great Plains skink is a species of lizard endemic to North America.
The prairie skink is a species of skink endemic to the prairies east of the Rocky Mountains in North America. It is one of only seven species of lizards that occur in Canada.
The (American) five-lined skink is a species of lizard in the family Scincidae. The species is endemic to North America. It is one of the most common lizards in the eastern U.S. and one of the seven native species of lizards in Canada.
Plestiodon inexpectatus, the southeastern five-lined skink is a common skink in the southeastern United States.
Plestiodon callicephalus, commonly known as the mountain skink, is a species of lizard, a medium-sized member of the Plestiodon skinks, endemic to North America.
Plestiodon multivirgatus, commonly known as the many-lined skink, the northern many-lined skink, or the variable skink, is a medium-sized species of lizard, a member of the North American skink genus Plestiodon in the family Scincidae.
The northern alligator lizard is a species of medium-sized lizard in the family Anguidae. The species is endemic to the North American west coast.
The western whiptail is a species of lizard in the family Teiidae. The species ranges throughout most of the southwestern United States and northern Mexico. Most of its populations appear stable, and it is not listed as endangered in any of the states comprising its range. It lives in a wide variety of habitats, including deserts and semiarid shrubland, usually in areas with sparse vegetation; it also may be found in woodland, open dry forest, and riparian growth. It lives in burrows. Major differences between this species and the checkered whiptail include the lack of enlarged scales anterior to the gular fold and the presence of enlarged postantebrachial scales. It was previously known as Cnemidophorus tigris, until phylogenetic analyses concluded that the genus Cnemidophorus was polyphyletic. Since it does not migrate, a number of forms have developed in different regions, several of which have been given subspecific names – for example the California whiptail, Aspidoscelis tigris munda.
Plestiodon is a genus of lizards in the family Scincidae (skinks). The genus contains many species formerly classified under the genus Eumeces, except those now placed in Mesoscincus. They are secretive, agile animals with a cylindrical body covered with smooth, shiny scales. They are distributed from East Asia to throughout North America from southern Canada south to Mexico, including oceanic islands such as Bermuda.
Plestiodon barbouri, also known commonly as Barbour's blue-tailed skink and Barbour's eyelid skink, is a species of lizard in the family Scincidae. The species is endemic to Japan.
Plestiodon copei, also known commonly as Cope's skink, is a species of lizard in the family Scincidae. The species is endemic to Mexico.
The Okada's five-lined skink or Far Eastern skink is a species of lizard which is endemic to Japan.
Plestiodon lynxe, also known commonly as the oak forest skink, is a species of lizard in the family Scincidae. The species is endemic to Mexico. There are three recognized subspecies.
