Coelonia brevis is a moth of the family Sphingidae. It is known from Madagascar. It is a pollinator of some species of baobab in Madagascar, including Adansonia za.Baum, D.A., 1995, A Systematic Revision of Adansonia (Bombacaceae). Annals of the Missouri Botanical Garden, 1995, Vol. 82, No. 3 (1995), pp. 440-471
The length of the forewings is about 39 mm for males.
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