Microlophus
Genus of lizards / From Wikipedia, the free encyclopedia
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Microlophus is a genus of tropidurid lizards native to South America. Around 20 species are recognized and 10 of these are endemic to the Galápagos Islands,[lower-alpha 1] where they are commonly known as lava lizards[2][1] (they are sometimes placed in Tropidurus instead). The remaining, which often are called Pacific iguanas, are found in the Andes and along the Pacific coasts of Chile, Peru, and Ecuador.
Microlophus | |
---|---|
Microlophus albemarlensis, female, a Galápagos endemic | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Reptilia |
Order: | Squamata |
Suborder: | Iguania |
Family: | Tropiduridae |
Genus: | Microlophus A.M.C. Duméril & Bibron, 1837 |
Type species | |
Iguana peruviana Lesson, 1830 | |
Species | |
around 20 |
The distribution of the lava lizards and their variations in shape, colour, and behaviour show the phenomenon of adaptive radiation so typical of the inhabitants of this archipelago. One species occurs on all the central and western islands, which were perhaps connected during periods of lower sea levels, while one species each occurs on six other more peripheral islands. All have most likely evolved from a single ancestral species. However, as usual for the Tropiduridae, they can change their colour individually to some extent, and members of the same species occurring in different habitats also show colour differences. Thus, animals living mainly on dark lava are darker than ones that live in lighter, sandy environments.