Diguetia signata

Gertsch, 1958

desertshrub spider

Diguetia signata is a of desertshrub spider in the Diguetidae, first described by Gertsch in 1958. It inhabits arid regions of the southwestern United States and Mexico, where it constructs distinctive horizontal sheet webs with central tubular retreats. The species belongs to a primitive spider lineage characterized by simple genital structures.

Pronunciation

How to pronounce Diguetia signata: //dɪˈɡweɪʃə sɪɡˈnɑːtə//

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Identification

Distinguished from similar Diguetia by specific markings (signata = 'marked' or 'signed'), though detailed diagnostic features require close examination. The horizontal sheet web with dome shape and central tubular retreat shrouded in plant debris helps distinguish it from funnel-web weavers (Agelenidae) and labyrinth spiders. The web's tangle of threads above and below the sheet, combined with the retreat's debris camouflage, are characteristic of the .

Habitat

Arid and semi-arid desert environments, typically associated with desert shrubs and cacti. Webs are constructed less than two feet above ground, frequently amid spiny pads of prickly pear cacti (Opuntia spp.). Retreats incorporate plant debris and prey remains for camouflage.

Distribution

United States (southwestern states) and Mexico.

Behavior

Constructs horizontal, slightly dome-shaped sheet webs with a central tubular retreat in the vertical plane above the sheet. The spider travels on the underside of the sheet to attack prey captured in the tangled threads surrounding the web. tend to be localized, with multiple webs found in close proximity.

Ecological Role

of small arthropods in desert ; web construction provides structure that may be used by other organisms after abandonment.

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