2 genera in North America north of Mexico
3.5-17mm in body length (Microhexura
spp. are pretty small, Euagrus
spp. are larger)(1)
Long spinnerets, but distal segments not pseudosegmented (compare to Mecicobothiriidae).
: southeastern Arizona and adjacent northeastern Sonora east to southcentral Texas.(2)
: along the lower Rio Grande River in extreme southern Texas.(2)
: known only from the Baboquivari Mountains in extreme southern Arizona.(2)
: Cascade Mountains, Blue Mountains, and northern Rocky Mountains of Washington, Oregon, Idaho, and Montana.(3)
: higher mountain peaks of the southern Blue Ridge Province in western North Carolina and eastern Tennessee.(3)
Ground-based webs under objects or in soft organic substrates.
Microhexura montivaga, the "Spruce-fir moss spider," is an endangered/protected species and is also one of the world's smallest mygalomorphs!
Coyle, Frederick A., 1981. The mygalomorph spider genus Microhexura
(Araneae, Dipluridae). Bulletin American Museum of Natural History 170: 64-75. (download available here
Coyle, Frederick A., 1988. A revision of the American funnel-web mygalomorph spider genus Euagrus
(Araneae, Dipluridae). Bulletin American Museum of Natural History 187: 203-292. (download available here
Ubick et al., 2005. Spiders of North America: an Identification Manual. American Arachnological Society, Keene (New Hampshire). 377 pages.