Agama

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Agama

 

(Agamidae), a family of lizards. The head is covered with small plates, the extremities are well developed, and the tail is usually long and is nonautotomic. The teeth are attached to the upper edge of the jaws (acrodonts). Agamas have the ability to change color under the influence of excitement or warmth. There are approximately 35 genera (Draco, Calotes, Phrynocephalus, Amphibolurus barbatus, Chlamydosaurus kingi, Uromastyx, Moloch horridas, and many others), which include approximately 300 species. They are found in Africa (with the exception of Madagascar); southeastern Europe; middle, central, and southern Asia; Australia; and New Guinea. In the USSR there are two genera (Agama and Phrynocephalus) represented by 13 species. The agamas are active during the day. Most of them feed predominantly on insects, and a few are herbivorous.

The genus Agama includes approximately 60 species (in Africa, southwest Asia, and southern Europe), seven of which are found in the USSR. The overall body length of adult agamas can be as much as 27 to 35 cm. One of the most characteristic lizards of the deserts and semideserts of middle Asia and the eastern Ciscaucasian area is the steppe agama (Agama sanguinolenta), whose body length can be as much as 30 cm. Typical for the mountains are the Caucasian agama (Agama caucasica), the Turkestan agama (Agama lehmanii), the Pavlovskii agama (Agama pawlowskii), and others.

P. V. TERENT’EV

References in periodicals archive ?
Reproductive ecology of the Jacky dragon (Amphibolurus muricatus): An agamid lizard with temperature-dependent sex determination.
In the agamid lizards of the genus Phrynocephalus, known as toad-headed lizards (see photo p.
A fundamental analogy between the Chamaeleo pattern and the agamid supraocular scutellation is evident from its general lining of irregular scales, distinct supraciliary border and almost indistinguishable inner circumorbital semicircles.
Still others--especially the agamid bearded lizard Amphibolurus isolepis and the skink Ctenotus calurus--live in the open spaces but are always prepared to return to the shelter of a clump of spinifex.
The agamid lizard Phrynocephalus interscapularis is the most common reptile and can reach a population density of 100 individuals/ha (1 ha=2.
The agamid frillneck lizard, Chlamydosaurus kingii, is a conspicuous component of the fauna of northern Australia during the wet season, but it "disappears" during the extended dry season (Shine and Lambeck 1989, Christian and Green 1994).
The reptiles and amphibians include the vulnerable Indian python (Python molurus); several threatened endemic species, such as the lizard Calotes liolepis, the island's rarest agamid, and the lizard Ceratophora aspera, now restricted to the wet areas of Sri Lanka; and the small endemic frog Ramella palmata.
Control of changes in body temperature, metabolism, and circulation by the agamid lizard, Amphibolorus barbatus Physiological Zoology 36:199-218.