Curtain-web
Guides
Euagridae
Spiny Curtain-web Spiders
Euagridae is a family of mygalomorph spiders commonly known as Spiny Curtain-web Spiders. The group was established as a tribe by Robert Raven in 1979, elevated to subfamily rank in 1985, and recognized as a full family by Opatova et al. in 2020 based on molecular phylogenetic analyses. As of 2025, the family comprises fourteen genera. Members are distinguished by their spiny morphology and curtain-web construction behavior.
Euagrus
curtain web spiders
Euagrus is a genus of curtain web spiders in the family Euagridae, first described by Anton Ausserer in 1875. The genus contains 22 species as of October 2025. It is morphologically similar to the genus Allothele, with several species historically transferred between the two genera. The name "Evagrus" occasionally appears in literature but represents a transcript error rather than a valid synonym.
Euagrus chisoseus
Spiny Curtain Web Spider
Euagrus chisoseus is a mygalomorph spider in the family Euagridae, described by Gertsch in 1939. It is commonly known as the Spiny Curtain Web Spider. The species occurs in the southwestern United States and Mexico. As a member of the Euagridae, it constructs sheet-like or curtain webs rather than the vertical orb webs of many other spider groups.