Desert iguana: Difference between revisions
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==Taxonomy== |
==Taxonomy== |
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The pecies was first described in the ''Catalog of North American Reptiles'', by [[Spencer Fullerton Baird]] and [[Charles Frédéric Girard]]) in [[1853]] as ''Crotaphytus dorsalis'' it was reclassified two years later as ''Dipsosaurus dorsalis'' by [[Edward Hallowell (herpetologist)|Edward Hallowell]].<ref name ="Baird">Baird,S.F. and Girard,C. (1852). ''Characteristics of some new reptiles in the Museum of the Smithsonian Institution, part 2''. Proceedings at the Acadamey of Natural Science, Philadelphia. '''6''': 125-129</ref> The generic name comes from [[Greek language|Greek]] for "thirsty lizard" (''Dipsa'', "thirst(y)", and ''sauros'', "lizard"). The specific name, ''dorsalis'', is a reference to a row of enlarged [[keeled scales]] on the middle of the back which form a crest that extends almost to the tip of the lizard's tail. ''Dipsosaurus'' is a [[monotypic]] genus with ''D. dorsalis'' being the only recognized species. |
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==Description== |
==Description== |
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Revision as of 12:42, 12 October 2008
| Desert iguana[1] | |
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| Species: | D. dorsalis
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| Dipsosaurus dorsalis | |
The desert iguana (Dipsosaurus dorsalis) is one of the most common lizards of the Sonoran and Mojave deserts of the southwestern United States and northwestern Mexico. They also occur on several Gulf of California islands.
Taxonomy
The pecies was first described in the Catalog of North American Reptiles, by Spencer Fullerton Baird and Charles Frédéric Girard) in 1853 as Crotaphytus dorsalis it was reclassified two years later as Dipsosaurus dorsalis by Edward Hallowell.[2] The generic name comes from Greek for "thirsty lizard" (Dipsa, "thirst(y)", and sauros, "lizard"). The specific name, dorsalis, is a reference to a row of enlarged keeled scales on the middle of the back which form a crest that extends almost to the tip of the lizard's tail. Dipsosaurus is a monotypic genus with D. dorsalis being the only recognized species.
Description
The desert iguana is a blunt medium-sized lizard which grows to 16" (40 cm) including the tail.[3] They are pale gray-tan to cream in color with a light brown reticulated pattern on their backs and sides. Down the center of the back is a row of slightly-enlarged, keeled dorsal scales that become slightly larger as you move down the back. The reticulated pattern gives way to brown spots near the back legs, turning into stripes along the tail. The tail is usually around 1 1/2 times longer than the body from snout to vent. The belly is pale. During the breeding season, the sides become pinkish in both sexes.
Habitat
Their preferred habitat is largely contained within the range of the creosote bush, mainly dry, sandy desert scrubland below 3300 ft. It can also be found in rocky streambeds up to 3300 ft. In the southern portion of its range this lizard lives in areas of arid subtropical scrub and tropical deciduous forest.
These lizards can withstand high temperatures and are out and about after other lizards have retreated into their burrows. They burrow extensively, and will often climb into shrubs for shelter and defense. Their burrows are usually constructed in the mounds of sand that accumulate around the bases of bushes like the creosote. They also often use ready-made burrows of kit foxes and Desert tortoises.
Diet and reproduction
Mating takes place in the early spring. It is believed that only one clutch of eggs is laid each year, with each clutch having 3-8 eggs.[4] The hatchlings emerge around September.[4]
Desert iguanas are primarily herbivorous, eating buds, fruits and leaves of many annual and perennial plants.[4] They are especially attracted to the yellow flowers of the creosote bush.[4] They have also been reported to eat insects, feces (mammal and lizard)and carrion.[4]
Predators of these iguanas and their eggs are birds of prey, foxes, rats, weasels, some snakes, and humans.[4]
References
- ^ "Dipsosaurus dorsalis". Integrated Taxonomic Information System. 2 September.
{{cite web}}: Check date values in:|date=and|year=/|date=mismatch (help) - ^ Baird,S.F. and Girard,C. (1852). Characteristics of some new reptiles in the Museum of the Smithsonian Institution, part 2. Proceedings at the Acadamey of Natural Science, Philadelphia. 6: 125-129
- ^ Stebbins, Robert (2003). Western Reptiles and Amphibians. New York: Houghton Mifflin. pp. 338–339, 537. ISBN 0395982723.
{{cite book}}: Cite has empty unknown parameter:|1=(help) - ^ a b c d e f Lemm, Jeffrey.(2006) Field Guide to Amphibians and Reptiles of the San Diego Region (California Natural History Guides). University of California Press.
- Frost, D.E. and R.E. Etheridge (1989) A Phylogenetic Analysis and Taxonomy of Iguanian Lizards (Reptilia: Squamata). Univ. Kansas Mus. Nat. Hist. Misc. Publ. 81
- Frost, D.R., R. Etheridge, D. Janies and T.A. Titus (2001) Total evidence, sequence alignment, evolution of Polychrotid lizards, and a reclassification of the Iguania (Squamata: Iguania). American Museum Novitates 3343: 38 pp.
External links
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