Dicopomorpha echmepterygis

Dicopomorpha echmepterygis is the smallest known insect and a species of parasitoid wasp of the family Mymaridae, which exhibits strong sexual dimorphism. The males are blind, apterous, and their body length is only 40% that of females. With a body length averaging 186 μm, males of D. echmepterygis have the shortest body length of all known insects. The measured body length of a female was 550 μm. Dicopomorpha echmepterygis males have relatively long legs and are dull grayish brown, with small heads that lack compound eyes, and unsegmented antennae. Females, however, have entirely black bodies with dusky brown legs and antennae. The antennae are twice as long as for males, and females have fully-functional wings that are narrowed slightly through the middle. The eggs and larvae of this parasitoid are considerably smaller than the adult.

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