Microhexura

{{Short description|Genus of spiders}}

{{Automatic taxobox

| taxon = Microhexura

| display_parents = 2

| image = Spruce_Fir_Moss_Spider.jpg

| image_caption = Spruce-fir moss spider (Microhexura montivaga)

| authority = Crosby & Bishop, 1925

| type_species = M. montivaga

| type_species_authority = Crosby & Bishop, 1925

| subdivision_ranks = Species

| subdivision = {{Specieslist

| M. idahoana|Chamberlin & Ivie, 1945 – USA

| M. montivaga|Crosby & Bishop, 1925 – USA}}

}}

Microhexura is a genus of tiny North American spiders that was first described by C. R. Crosby & S. C. Bishop in 1925.{{cite journal| last1=Crosby| first1=C. R.| last2=Bishop| first2=S. C.| year=1925| title=Two new spiders from the Blue Ridge Mountains of North Carolina.| journal=Entomological News| pages=142–146| volume=36}} It is the only genus in the family Microhexuridae. {{As of|2020|07}}, it contained only two species, both found in the United States: M. idahoana and M. montivaga.{{cite journal| title=Gen. Microhexura Crosby & Bishop, 1925| website=World Spider Catalog Version 21.0| accessdate=2020-07-15| publisher=Natural History Museum Bern| url=http://www.wsc.nmbe.ch/genus/814| doi=10.24436/2}} 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.{{cite web| title=Genus Microhexura| publisher=BugGuide| accessdate=2019-06-01| url=https://bugguide.net/node/view/1329937}}

M. montivaga is considered endangered. M. idahoana is widespread in old growth from Mount Rainier southward.{{cite web| title=Spider Collector's Journal (16th page: 2006)| first=Rod| last=Crawford| year=2006| accessdate=2019-06-01| publisher=Scarabs: The Bug Society| url=http://crawford.tardigrade.net/journal/Journal16.html}}