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The ecomorph concept is a term first coine … The ecomorph concept is a term first coined by Ernest Edward Williams in 1972 which he defined as a “species with the same structural habitat/niche, similar in morphology and behavior, but not necessarily close phyletically.” Williams first applied this definition to the Greater Antillean anoles (especifically in Puerto Rico) upon observing their evolutionary radiation, although it has since been used widely elsewhere. Anoles have repeatedly evolved into similar forms on different islands, dubbed 'ecomorphs'. Convergence is in microhabitat specialty, behavior, and morphology. Langerhans, Knouft & Losos call the set of Anolis lizard ecomorphs of the Greater Antilles "a classic example of convergent evolution." Jonathan Losos defined six Anolis ecomorphs according to the predominant microhabitat (e.g. grasses, open ground, different parts of trees) of the respective Anolis: crown giant, trunk-crown, trunk, trunk-ground, twig, and grass-bush.trunk, trunk-ground, twig, and grass-bush.
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