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Summary. Ceylon Junglefowl was described in 1807 by the Dutch ornithologist Coenraad Jacob Temminck. The specimens he examined were tailless (‘rumpless’) and therefore he named them Gallus ecaudatus. In 1831 the French naturalist René Primevère Lesson described a Ceylon Junglefowl with a tail as Gallus lafayetii (= lafayettii), apparently unaware of Temminck's ecaudatus. Subsequently, ecaudatus and lafayettii were realised to be the same species, of which G. stanleyi and G. lineatus are junior synonyms. However, Charles Darwin tried to disprove the existence of wild tailless junglefowl on Ceylon in favour of his theory on the origin of the domestic chicken.

On Temminck's tailless Ceylon Junglefowl, and how Darwin denied their existence