Plestiodon tetragrammus

Four-lined skink
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Subphylum: Vertebrata
Class: Reptilia
Order: Squamata
Suborder: Lacertilia
Infraorder: Scincomorpha
Family: Scincidae
Genus: Plestiodon
Species: P. tetragrammus
Binomial name
Plestiodon tetragrammus
Baird, 1859
Synonyms
  • Eumeces tetragrammus
    (Baird, 1859)

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.

Taxonomy

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.

Description

The two suspecies 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).

Geographic range

Plestiodon tetragrammus occurs in northern Mexico and along the Mexican Gulf coast and in western and central Texas.

Habitat

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.

Reproduction

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.

References

  1. Hammerson, G.A., Lavin, P. & Mendoza-Quijano, F. (2007). "plestiodon tetragrammus". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved May 10, 2014.
  2. Plestiodon tetragrammus, The Reptile Database

Further reading

External links

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