Axymyiidae

Definition

A small family of nematoceran flies (Diptera) constituting the sole extant group of the infraorder Axymyiomorpha, though historically placed within Bibionomorpha. The family comprises only nine described extant species in four genera, plus eight fossil species, making it one of the most species-poor families of true flies.

Etymology

Example

Axymyiidae larvae develop in decaying wood and fungal fruiting bodies, with adults typically found in damp woodland habitats; the family includes genera such as Axymyia and Protaxymyia.

Related Terms

• Axymyiomorpha
• Bibionomorpha
• Nematocera
• Diptera
• Axymyia

Usage Notes

Modern phylogenetic studies recognize Axymyiidae as the only living representative of Axymyiomorpha, a sister group to Bibionomorpha; older literature may treat it as part of Bibionomorpha. The extreme rarity and limited geographic distribution of extant species make this family of particular interest to dipteran systematists studying relict nematoceran lineages.