Araneus

Clerck, 1757

Angulate and Roundshouldered Orbweavers

Species Guides

35

Araneus is a large of orb-weaving spiders in the Araneidae, comprising over 500 . The genus exhibits pronounced , with males typically one-third to one-quarter the size of females and possessing more elongated and longer legs. Females construct characteristic circular orb webs, often with a retreat connected by a signal thread. The genus includes well-known species such as the European garden spider (A. diadematus) and the barn spider (A. cavaticus).

Araneus gemmoides by (c) Andrey Zharkikh, some rights reserved (CC BY). Used under a CC-BY license.Araneus by (c) Sebastian Serna Muñoz, some rights reserved (CC BY), uploaded by Sebastian Serna Muñoz. Used under a CC-BY license.Araneus miniatus by (c) skitterbug, some rights reserved (CC BY), uploaded by skitterbug. Used under a CC-BY license.

Pronunciation

How to pronounce Araneus: //ˌæɹəˈniːəs//

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

Identification

Females recognized by rounded, often patterned with variable coloration; males distinguished by smaller size, elongated abdomen, and longer legs. Female epigyne features a long scape (tongue-like appendage); male possess hook-like terminal . Abdominal present anterolaterally. identification often requires examination of genitalic structures due to high morphological variability within the .

Images

Habitat

Diverse including forests, woodlands, gardens, wetlands, and human structures. Some prefer specific microhabitats: A. cavaticus commonly found in barns and buildings, A. pegnia in wet areas such as bogs and river bottoms, A. bonali on oak trunks with lichen cover.

Distribution

distribution with records from North America, Europe, Asia, South America (to Ecuador), and the Caribbean (Bahamas, Cuba, Jamaica). Specific distribution varies by .

Seasonality

Most active and conspicuous in autumn when females reach maturity and maximum size. Females typically spin webs at night and occupy retreats by day. Males wander in search of mates during autumn, often leading to increased indoor encounters.

Diet

; feeds on insects and other small arthropods captured in orb webs.

Life Cycle

sacs produced by females, often attached to substrate near web. Spiderlings emerge and disperse; juveniles of some occupy different microhabitats than (e.g., A. bonali juveniles in oak , adults on trunk). Lifespan typically , with most individuals perishing after first hard frost.

Behavior

Females construct orb webs at night, often with incomplete sectors and signal threads connecting to retreats. When disturbed, some shake violently in web as defensive . Males do not build capture webs and wander to find females. Web placement sometimes associated with artificial light sources to exploit insect attraction.

Ecological Role

of flying and crawling insects; contributes to . Serves as prey for spider-hunting wasps such as Sceliphron caementarium.

Human Relevance

Generally harmless to humans; venom varies in but often delivered as dry bite. Some (e.g., A. cavaticus) common in human structures. Subject of scientific study on silk production and web architecture. Featured in popular culture (1952 documentary on A. diadematus nominated for Oscar).

Similar Taxa

  • NeosconaBoth are orb-weaving in Araneidae with rounded ; Neoscona typically has less pronounced abdominal and different epigyne structure.
  • ArgiopeBoth construct orb webs, but Argiope typically have more elongate with bold, contrasting color patterns and often include in webs.
  • EriophoraSimilar orb-weaving habit and body form; Eriophora often have more hairy bodies and different genitalic .

Sources and further reading