Araniella

Distinguished from other small orb-weavers by combination of green/yellow coloration, small body size, and paired black abdominal spots. A. displicata specifically identified by three (sometimes four) pairs of black dots on rear half of abdomen. Closely related species A. cucurbitina and A. opisthographa require examination of epigynal morphology—specifically receptaculum length and distance between receptaculum and copulatory duct—for reliable separation; males distinguished by palpal morphology. A. alpica and A. inconspicua cannot be separated by CO1 DNA barcoding due to shared haplotypes, requiring morphological examination of males.

Vegetated environments including woodlands, heath and heather fields, gardens, and yards. Webs frequently constructed across edges of single large leaves, positioned 4–6 feet above ground. Horizontal web orientation common, spanning foliage where long-legged flies (Dolichopodidae) and other leaf-skittering insects occur. Sunflowers and similar vegetation with extrafloral nectaries attract prey and consequently these spiders.

Widespread across Palearctic and Nearctic regions. North American records primarily A. displicata, distributed across virtually entire continent including parts of Alaska. European distribution includes multiple species with varying ranges: A. cucurbitina and A. opisthographa widespread; A. alpica in mountainous regions; A. maderiana restricted to Macaronesia. Asian distribution extends through Russia (Europe to Far East), Central Asia, Caucasus, Turkey, Iran, China, Korea, Japan, and Indian subcontinent. Recently described A. villanii ranges from southwestern Iran to eastern Kazakhstan and northern India.

A. displicata overwinters as subadults, reaching adulthood late May to June in temperate North America (earlier in southern climates). Mating occurs shortly after maturity; egg sacs produced June–July. Adults present from late spring through late summer; juveniles predominate from late summer onward. Other species presumably follow similar seasonal patterns in temperate zones, though specific timing varies by latitude.

Overwinters as subadult. Reaches sexual maturity in late spring to early summer. Mating occurs shortly after maturity. Female constructs egg sac containing approximately 80 eggs, covered in loose fluffy yellowish silk; deposited in curled leaf that serves as maternal retreat at web perimeter. Spiderlings emerge and develop through subsequent season, reaching subadult stage before winter.

Constructs small orb webs relative to body size—typically 3–4 inches in diameter, notably smaller than webs of larger araneid relatives. Web positioned well above ground, frequently oriented horizontally across leaf edges. Spider occupies hub position, hanging beneath horizontal webs or positioned head-down in vertical webs. Web placement targets interception of insects that move between leaves, particularly long-legged flies.

Predator of small flying and leaf-dwelling insects; web placement across vegetation edges exploits movement patterns of prey between foliage patches.

Occur commonly in gardens and yards where they contribute to insect population regulation. Not dangerously venomous to humans or pets despite possessing venom. A. cucurbitina widely known as cucumber green spider in Europe. Subject of taxonomic research including integrative studies combining morphology and molecular data.

• AraneusLarger body size and substantially larger webs; lacks distinctive paired black abdominal spot pattern and green biliverdin-based coloration of Araniella
• ZygiellaConstructs orb webs with characteristic missing sector; different abdominal patterning and epigynal morphology
• MangoraDifferent web architecture and stabilimentum patterns; distinct abdominal shape and coloration

• Araneidae
• orb-weaver
• green spider
• cryptic species
• integrative taxonomy
• Palearctic
• Nearctic

• BugGuide
• Wikipedia
• GBIF taxonomy match
• iNaturalist taxon
• NCBI Taxonomy
• Catalogue of Life
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