Southern alligator lizard

The southern alligator lizard (Elgaria multicarinata) is a common species of lizard native to the Pacific coast of North America.[2] It ranges from Baja California to the state of Washington and lives in a variety of habitats including grasslands, chaparral, forests, and even urban areas.[2][3] In dry climates, it is likely to be found in moist areas or near streams.[2]

Southern alligator lizard
Conservation status
Least Concern  (IUCN 3.1)
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Order:	Squamata
Family:	Anguidae
Genus:	Elgaria
Species:	E. multicarinata
Binomial name
Elgaria multicarinata (Blainville, 1835)
Synonyms[1]
Cordylus (Gerrhonotus) multi-carinatus Blainville, 1835 Gerrhonotus multicarinatus — A.M.C. Duméril & Bibron, 1839 Elgaria multicarinata — Liner, 1994

Taxonomy and etymology

The generic name Elgaria is possibly named for an "Elgar" or a pun on "alligator." The specific name multicarinata refers to the keeled scales characteristic of this species.[4] The common name "alligator lizard" is a reference to the fact that the back and belly scales of these lizards are reinforced by bone, as they are in alligators.[5]

Three subspecies can be distinguished: the California alligator lizard (E. m. multicarinata), the San Diego alligator lizard (E. m. webbii), and the Oregon alligator lizard (E. m. scincicauda).[3]

The subspecific name webbii is in honor of Thomas Hopkins Webb (1801–1866) who was Secretary of the United States and Mexican Boundary Survey (1848–1855).[6] The subspecific name scincicauda means "skink tail".

Description

Adult southern alligator lizard, San Joaquin County California

The southern alligator lizard measures from 3 to 7 inches (7.3 - 17.8 cm) in snout-to-vent length (SVL). Including tail, it can reach a foot in length (30 cm).[3] It has a round thick body with small legs and a long somewhat prehensile tail that can be twice as long as the lizard's body.[2] Like many lizards, this species can drop its tail if attacked, possibly giving it a chance to flee. It lives on average 10 to 15 years, and survives well in captivity.[2]

The color of this species is variable, and can be brown, gray, green, or yellowish above, often with red blotches on the middle of the back. Usually there are between 9 and 13 dark crossbands on the back, sides, and tail, with adjacent white spots. These crossbands can be pronounced or covered with reddish or yellowish color.[3][4]

The scales of E. multicarinata are keeled on the back, sides, and legs. There are 14 rows of scales across the back at the middle of the body. A band of smaller granular scales separates the larger scales on the back and stomach, creating a fold along each side of the animal. These folds allow the body to expand to hold food or eggs.[4]

Geographic range and habitat

The southern alligator lizard is native to the Pacific coast of North America, ranging from the state of Washington to Baja California. These lizards can be found across many diverse habitats, including grassland, open forest, chaparral, suburban and urban areas, and even into the desert along the Mojave River.[4][7] This species is particularly common in foothill oak woodlands, and is often found hiding under rocks, logs, or other surface cover.[4]

Diet

E. multicarinata eats small arthropods, slugs, lizards, small mammals, and occasionally young birds and eggs.[3]

Behavior and reproduction

Defensive display

The southern alligator lizard frequently can be found near human habitation, and is often seen foraging in the mornings and evenings. It is often found in or around suburban yards and garages.[4] E. multicarinata is notable for its vicious self-defense, and will bite and defecate if handled.[2]

Mating occurs in spring, typically from April to May, though in warmer regions this species will breed year-round.[4][5] Eggs are usually laid between May and June and hatch during late summer and early fall.[4] Females lay two clutches of eggs per year, often in decaying wood or plant matter to keep them warm. Females will guard the eggs until they hatch.[5]

See also

• Northern alligator lizard

References

1. "Elgaria multicarinata ". The Reptile Database. www.reptile-database.org.
2. "Summary - Southern Alligator Lizard (Elgaria multicarinata) Fact Sheet". San Diego Zoo Factsheets. San Diego Zoo. December 11, 2018. Retrieved April 6, 2019.
3. Stebbins, Robert C. (2003). A Field Guide to Western Reptiles and Amphibians, Third Edition. The Peterson Field Guide Series ®. Boston and New York: Houghton Mifflin. xiii + 533 pp. ISBN 0-395-98272-3. (Elgaria multicarinata, pp. 331-332 + Plate 41 + Map 124).
4. "California Alligator Lizard - Elgaria multicarinata multicarinata ". www.californiaherps.com. Retrieved 2015-12-28.
5. "Sacramento Zoo -- Alligator Lizard".
6. Beolens, Bo; Watkins, Michael; Grayson, Michael (2011). The Eponym Dictionary of Reptiles. Baltimore: Johns Hopkins University Press. xiii + 296 pp. ISBN 978-1-4214-0135-5. (Elgaria multicarinata webbii, p. 280).
7. "California Wildlife Habitat Relationships System -- Southern Alligator Lizard". California Department of Fish and Wildlife.

External links

• Western Ecological Research Center: "Elgaria multicarinatus ", the southern alligator lizard

Further reading

• Behler, John L.; King, F. Wayne (1979). The Audubon Society Field Guide to North American Reptiles and Amphibians. New York: Alfred A. Knopf. 743 pp. ISBN 0-394-50824-6. (Gerrhonotus multicarinatus, pp. 542 + Plates 445, 449).
• Blainville, H.D. de (1835). "Description de quelques espèces de reptiles de la Californie précédée de l'analyse d'un système général d'herpétologie et amphibiologie ". Nouvelles Annales du Muséum D'Histoire Naturelle 4: 233-296. ("Cordylus (Gerrhonotus) multi-carinatus ", new species, p. 289 + Plate XXV, figures 2, 2A, 2B, 2C). (in French).
• Smith, Hobart M.; Brodie, Edmund D., Jr. (1982). Reptiles of North America: A Guide to Field Identification. New York: Golden Press. 240 pp. ISBN 0-307-13666-3 (paperback), 0-307-47009-1 (hardcover). (Elgaria multicarinata, pp. 88–89).