Tibellus chamberlini

Gertsch, 1933

Chamberlin's Slender Crab Spider

Tibellus chamberlini is a of running crab spider in the Philodromidae, first described by Gertsch in 1933. It belongs to a of slender, elongate spiders adapted for ambush hunting on grasses and foliage. The species is distributed across the United States and Canada, though specific details of its remain poorly documented compared to better-known .

Pronunciation

How to pronounce Tibellus chamberlini: /tɪˈbɛləs ˌtʃæmbərˈlaɪni/

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Identification

of Tibellus chamberlini can be distinguished from other Tibellus by subtle morphological characters requiring examination of genitalia, as external features overlap considerably among . The Tibellus as a whole is characterized by an extremely slender, elongate body with longitudinal stripes that provide camouflage on grass stems and leaves. Adults range 5–11 mm in body length. Tibellus chamberlini may be separated from the similar genus Thanatus (also Philodromidae) by its more gracile build and preference for elevated substrates rather than ground-level hunting; from Pisaurina nursery web spiders by the latter's more robust body, hairier appearance, and different arrangement; and from Oxyopes salticus (Striped Lynx Spider) by the latter's long leg spines, scrunched hunting posture, and longer '.'

Distribution

United States and Canada. Specific state and provincial records are sparse in available sources.

Similar Taxa

  • Tibellus oblongusAnother widespread North American Tibellus with overlapping range and nearly identical external ; definitive identification requires examination of male or female .
  • Tibellus maritimusCoastal with similar slender build and striped pattern; preference (coastal marshes vs. inland grasslands) may help distinguish, though range overlap exists.
  • Thanatus formicinusPhilodromid spider with similar striped appearance, but more robust body and primarily ground-dwelling habit compared to the elevated perching typical of Tibellus.
  • Pisaurina miraNursery web spider with longitudinal stripes and similar resting posture, but larger size at maturity (12.5–16.5 mm vs. 6–11 mm for Tibellus), more robust build, and different arrangement.

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Sources and further reading