Microhexura

Microhexura is a genus of tiny North American spiders that was first described by C. R. Crosby & S. C. Bishop in 1925.^[1][2] It is the only genus in the family Microhexuridae.^[3] As of July 2020^[update], it contained only two species, both found in the United States: M. idahoana and M. montivaga.^[1] M. montivaga occurs in the higher peaks of the Blue Ridge Mountains of North Carolina and Tennessee. M. idahoana occurs further west, in the Cascades, the Blue Mountains, and the northern Rocky Mountains.^[4]

Microhexura
Spruce-fir moss spider (Microhexura montivaga)
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Subphylum:	Chelicerata
Class:	Arachnida
Order:	Araneae
Infraorder:	Mygalomorphae
Clade:	Avicularioidea
Family:	Microhexuridae
Genus:	Microhexura Crosby & Bishop, 1925[1]
Type species
M. montivaga[1] Crosby & Bishop, 1925
Species
M. idahoana Chamberlin & Ivie, 1945 – USA M. montivaga Crosby & Bishop, 1925 – USA

M. montivaga is considered endangered. M. idahoana is widespread in old growth from Mount Rainier southward.^[5]