Geolycosa xera archboldi
McCrone, 1963
Archbold's Burrowing Wolf Spider
Geolycosa xera archboldi is a of burrowing wolf spider in the Lycosidae. Like other members of the Geolycosa, it constructs and inhabits deep, silk-lined burrows in sandy soils. The subspecies designation suggests geographic isolation and potential ecological specialization. are hunters that may be detected at night by the reflective glow of their when illuminated by artificial light.
Pronunciation
How to pronounce Geolycosa xera archboldi: /ˌdʒiːoʊlɪˈkoʊsə ˈzɪərə ɑːrkˈboʊldi/
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Identification
This can be distinguished from other Geolycosa by its association with xeric (dry) , as suggested by the specific epithet 'xera.' Members of the Geolycosa are characterized by a that is distinctly higher anteriorly than posteriorly, stout front legs adapted for digging, and large body size relative to other wolf spiders. Females typically reach approximately 21 mm in body length, males 15–18 mm. The burrow entrance is often ringed with a turret of silk mixed with debris.
Images
Habitat
Sandy soils in open, xeric areas with sparse ground litter. The specific epithet and name suggest to dry conditions, potentially in association with scrub or grassland in the southeastern United States.
Distribution
United States; specifically associated with the Archbold Biological Station region in Florida, based on the epithet. GBIF records confirm presence in USA and North America.
Life Cycle
Geolycosa typically have a two-year . Half-grown individuals overwinter in burrows that may exceed one meter in depth, while summer burrows average 20–25 cm. Both sexes mature in late summer or early autumn. Mated females lay in May or June of the following year, preparing spherical egg sacs that are sunned at the burrow entrance on warm days. Spiderlings disperse only short distances from maternal burrows, resulting in localized .
Behavior
. hunt at night and can be located by the blue-green reflection from their when illuminated with a headlamp or flashlight. During daylight hours, individuals retreat to their burrows or may be found under surface debris. Males wander in search of females during the mating season. Both sexes are sedentary, spending the majority of their lives within their burrows.
Ecological Role
As a large, , this spider likely contributes to regulation of ground-dwelling insect in sandy, open . Its burrowing activity may also influence soil structure and microhabitat availability.
Human Relevance
May be encountered by entomologists and arachnologists conducting surveys in suitable . The reflective glow makes this and other lycosids relatively easy to detect during night collecting. Not known to pose any significant medical threat to humans.
Similar Taxa
- Geolycosa missouriensisShares the burrowing habit and general , but occurs in the Great Plains region rather than the southeastern United States. G. missouriensis has been documented from southern Canada to Texas, east to New York and west to Utah and Arizona.
- Hogna speciesAlso large wolf spiders, but Hogna lacks the distinctly elevated and does not construct deep, permanent burrows with debris turrets.
- Arctosa littoralisAnother large lycosid found in sandy , but A. littoralis is associated with beaches and riverbanks rather than inland xeric sites, and does not construct deep burrows.