Microhexura
Genus of spiders
From Wikipedia, the free encyclopedia
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] with two described species, both found in the United States: M. idahoana and M. montivaga.[1]
| Pygmy Funnel-web Spiders | |
|---|---|
| |
| Spruce-fir moss spider (M. montivaga) | |
 | |
| M. 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 | |
| |
 | |
| blue: reported countries (WSC) | |
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]
M. montivaga is considered endangered. M. idahoana is widespread in old growth from Mount Rainier southward.[5]
Species
As of January 2026[update], this genus includes two species:[1]
- Microhexura idahoana Chamberlin & Ivie, 1945 – Canada, United States
- Microhexura montivaga Crosby & Bishop, 1925 – United States
