Iguana: Wikis

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Iguana
Green Iguana Iguana iguana
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Sauropsida
Order: Squamata
Suborder: Iguania
Family: Iguanidae
Genus: Iguana
Laurenti, 1768
Species

Iguana is a genus of lizard native to tropical areas of Central and South America and the Caribbean. The genus was first described by Austrian naturalist Josephus Nicolaus Laurenti in his book Specimen Medicum, Exhibens Synopsin Reptilium Emendatam cum Experimentis circa Venena in 1768. The genus Iguana includes two species: the Green Iguana, which is widespread throughout its range and a popular pet, and the Lesser Antillean Iguana, which is endemic to the Lesser Antilles and endangered due to habitat destruction.

The word "Iguana" is derived from a Spanish form of the original Taino name for the species "Iwana".[1]

Contents

Anatomy and physiology

The two species of lizard within the genus Iguana possess a dewlap, a row of spines running down their back to their tail, and a third "eye" on their head. This eye is known as the parietal eye, visible as a pale scale on the top of the head. Behind their neck are small scales which resemble spikes, known as tuberculate scales. These scales may be a variety of colors and are not always visible from close distances. They have a large round scale on their cheek known as a subtympanic shield.

Iguanas have excellent vision and are able to see shapes, shadows, colors and movement at long distances. Iguanas use their eyes to navigate through crowded forests, as well as for finding food. They use visual signals to communicate with other members of the same species.

They respond to visual stimulus of colors such as orange, yellow, pink, and in rare cases blue as food substances.

An iguana's ear is known as the tympanum. It is the iguana's ear drum, and is located right above the subtympanic shield and behind the eye. Iguanas are often hard to spot, as they tend to blend into their surroundings. The color green helps as a mode of hiding from larger predators.

Gallery

References

  1. ^ Coles, William (2002), "Green Iguana", U.S.V.I. Animal Fact Sheet #08 (Department of Planning and Natural Resources US Virgin Islands Division of Fish and Wildlife), http://www.vifishandwildlife.com/Education/FactSheet/PDF_Docs/08GreenIguana.pdf 

Bibliography

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1911 encyclopedia

Up to date as of January 14, 2010

From LoveToKnow 1911

IGUANA, systematically Iguanidae (Spanish quivalent of Carib iwana), a family of pleurodont lizards, comprising about 50 genera and 300 species. With three exceptions, all the genera of this extensive family belong to the New World, being specially characteristic of the Neotropical region, where they occur as far south as Patagonia, while extending northward into the warmer parts of the Nearctic regions as far as California and British Columbia. The exceptional genera are Brachylophus in the Fiji Islands, Hoplurus and Chalarodon in Madagascar. The iguanas are characterized by the peculiar form of their teeth, these being round at the root and blade-like, with serrated edges towards the tip, resembling in this respect the gigantic extinct reptile Iguanodon. The typical forms belonging to this family are distinguished by the large dewlap or pouch situated beneath the head and neck, and by the crest, composed of slender elongated scales, which extends in gradually diminishing height from the nape of the neck to the extremity of the tail. The latter organ is very long, slender and compressed. The tongue is generally short and not deeply divided at its extremity, nor is its base retracted into a sheath; it is always moist and covered with a glutinous secretion. The prevailing colour of the iguanas is green; and, as the majority of them are arboreal in their habits, such colouring is generally regarded as pro FIG. I. - Iguana.

tective. Those on the other hand which reside on the ground have much duller, although as a rule equally protective hues. Some iguanas, however (e.g. Anolis carolinensis), possess, to an extent only exceeded by the chameleon, the power of changing their colours, their brilliant green becoming transformed under the influence of fear or irritation, into more sombre hues and even into black. They differ greatly in size, from a few inches to several feet in length.

One of the largest and most widely distributed is the common iguana (Iguana tuberculata), which occurs in the tropical parts of Central and South America and the West Indies, with the closely allied I. rhinolophus. It attains a length of 6 ft., weighing then perhaps 30 lb, and is of a greenish colour, occasionally mixed with brown, while the tail is surrounded with alternate rings of those colours. Its food consists of vegetable substances, mostly leaves, which it obtains from the forest trees among whose branches it lives and in the hollows of which it deposits its eggs. These are of an oblong shape about 12 in. in length, and are said by travellers to be very pleasant eating, especially when taken raw, and mixed with farina. They are timid, defenceless animals, depending for safety on the comparative inaccessibility of their arboreal haunts, and their protective colouring, which is rendered even more effective by their remaining still on the approach of danger. But the favourite resorts of the iguana are trees which overhang the water, into which they let themselves fall with a splash, whatever the height of the tree, and then swim away, or hide at the bottom for many minutes. Otherwise they exhibit few signs of animal intelligence. "The iguana," says H. W. Bates (The Naturalist on the Amazons), " is one of the stupidest animals I ever met. The one I caught dropped helplessly from a tree just ahead of me; it turned round for a moment to have an idiotic stare at the intruder and then set off running along the path. I ran FIG. 2. - Head of Iguana rhinolophus. after it and it then stopped as a timid dog would do, crouching down and permitting me to seize it by the neck and carry it off." Along with several other species, notably Ctenosura acanthinura, which is omnivorous, likewise called iguana, the common iguana is much sought after in tropical America; the natives esteem its flesh a delicacy, and capture it by slipping a noose round its neck as it sits in fancied security on the branch of a tree.

Although chiefly arboreal, many of the iguanas take readily to the water; and there is at least one species, Amblyrhynchus cristatus, which leads for the most part an aquatic life. These marine lizards occur only in the Galapagos Islands, where they are never seen more than 20 yds. inland, while they may often be observed in companies several hundreds of yards from the shore, swim ming with great facility by means of their flattened tails.

Their feet are all more or less webbed, but in swimming they are said to keep these organs motionless by their sides. Their food consists of marine vegetation, to obtain which they dive beneath the water, where they are able to remain, without coming to the surface to breathe, for a very considerable time. Though they are thus the most aquatic of lizards, Darwin, who studied their habits during his visit to those islands, states that when frightened they will not enter the water. Driven along a narrow ledge of rock to the edge of the sea, they preferred capture to escape by swimming, while if thrown into the water they immediately returned to the point from which they started. A land species belonging to the allied genus Conolophus also occurs in the Galapagos, which differs from most of its kind in forming burrows in the ground.


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Wiktionary

Up to date as of January 15, 2010
(Redirected to iguana article)

Definition from Wiktionary, a free dictionary

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Contents

English

Marine iguanas (Amblyrhynchus cristatus)

Pronunciation

Etymology

Spanish iguana, from Taino iwana.

Noun

Singular
iguana

Plural
iguanas

iguana (plural iguanas)

  1. Any of several members of the lizard family Iguanidae.
  2. Any member of the genus Iguana.
  3. A green iguana (Iguana iguana); a large tropical American lizard often kept as a pet.

Translations

The translations below need to be checked and inserted above into the appropriate translation tables, removing any numbers. Numbers do not necessarily match those in definitions. See instructions at Help:How to check translations.
  • Isthmus Zapotec: guchachiʼ, guiu (small)

Derived terms

Anagrams


Galician

Noun

iguana f. (plural iguanas)

  1. iguana

Italian

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Italian Wikipedia has an article on:
Iguana

Wikipedia it

Noun

iguana f. (plural iguane)

  1. iguana

Polish

Etymology

From Spanish iguana, from Taino iwana.

Noun

iguana f.

  1. iguana

Declension

Singular Plural
Nominative iguana iguany
Genitive iguany iguan
Dative iguanie iguanom
Accusative iguanę iguany
Instrumental iguaną iguanami
Locative iguanie iguanach
Vocative iguano iguany

Portuguese

Noun

iguana f.

  1. iguana.

Spanish

Etymology

Taino iwana.

Noun

iguana f. (plural iguanas)

Singular
iguana f.

Plural
iguanas f.

  1. iguana

Wikispecies

Up to date as of January 23, 2010

From Wikispecies

Taxonavigation

Main Page
Cladus: Eukaryota
Supergroup: Unikonta
Cladus: Opisthokonta
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Deuterostomia
Phylum: Chordata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Superclassis: Tetrapoda
Classis: Reptilia
Subclassis: Diapsida
Infraclassis: Lepidosauromorpha
Superordo: Lepidosauria
Ordo: Squamata
Subordo: Sauria
Infraordo: Iguania
Familia: Iguanidae
Genus: Iguana
Species: I. delicatissima - I. iguana

Name

Iguana (Laurenti, 1768)

References

Vernacular name

日本語: グリーンイグアナ属
ไทย: อิกัวนา
Tiếng Việt: Kỳ nhông

Simple English

Iguana
File:Iguana
A green iguana (Iguana iguana)
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Sauropsida
Order: Squamata
Suborder: Iguania
Family: Iguanidae
Genus: Iguana
Laurenti, 1768
Species
  • Lesser Antillean Iguana, I. delicatissima
  • Green Iguana, I. iguana

Iguana is a type of lizard that lives in tropical areas of Central and South America and the Caribbean. They were first described by Austrian naturalist Josephus Nicolaus Laurenti in 1768. There are two different species of lizard: the Green Iguana and the Lesser Antillean Iguana.

What they look like

The two species of lizard both have a dewlap, a row of spines running down their back to their tail, and a third eye on their head. This eye is known as the Parietal eye, which looks just like a pale scale on the top of their head. Behind their neck are small scales which look like spikes, and are called tuberculate scales. They also have a large round scale on their cheek called a subtympanic shield.

Senses

Iguanas have excellent vision and can see long distances, shapes, shadows, color and movement. An iguana uses its eyes to navigate through trees and forests, as well as for finding food. They also use their eyes to communicate with members of the same species. An iguana's ear is called a tympanum. It is the iguana's ear drum and is found right above the subtympanic shield and behind the eye. This is a very thin, delicate part of the iguana, and is very important to its hearing.

Look up Iguana in Wikispecies, a directory of species

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