Estrandia grandaeva

Estrandia species are small linyphiid spiders with characteristic genitalic structures that require microscopic examination for definitive identification. Estrandia grandaeva can be distinguished from congeners by the detailed morphology of the male pedipalps and female epigynum, particularly the arrangement of sclerites and the shape of the copulatory openings. External somatic characters such as body size, coloration, and eye arrangement overlap broadly with other Estrandia and small linyphiid genera.

Cool, moist environments including boreal forests, montane meadows, and riparian zones. Often found in herbaceous vegetation and low shrubs where sheet webs can be anchored.

Circumboreal: Canada (including Yukon and British Columbia), northern United States, northern Europe, Russia (European Russia to the Far East including Kamchatka), China, and Japan.

Constructs horizontal sheet webs with a dense tangle of threads above the sheet to intercept flying insects, which then fall onto the sheet where the spider captures them from beneath.

Small predator in herbaceous and shrub layers of boreal and montane ecosystems; contributes to regulation of small insect populations.

• Estrandia blandaOverlapping distribution in northern regions; distinguished by subtle differences in genitalic morphology requiring detailed examination.
• Other small Linyphiidae genera (e.g., Linyphia, Neriene)Similar web architecture and body size; Estrandia distinguished by genitalic characters and specific tibial spine patterns.

• sheet-web spider
• boreal
• circumboreal
• Linyphiidae
• Araneae

• BugGuide
• GBIF taxonomy match
• NCBI Taxonomy
• Catalogue of Life