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Xysticus posti Sauer, 1968

	FAMILY: THOMISIDAE Sundevall, 1833     Genus: Xysticus C. L. Koch, 1835         Species: Xysticus posti Sauer, 1968
	Author: Hancock, John Page views: 1,516 Write a Review: Visitor Comments: (0)

Family Common Name:  crab spiders
Genus Common Name:  ground crab spiders
Species Common Name:  none

Global Distribution: USA
Nearctic States & Provinces: AB

Seasonality Specimen Search Specimen list 0, 2

Feeding Guild:^† ambushers
^†Feeding guild when noted defined by Uetz, G. W., J. Halaj, and A. B. Cady. 1999. Guild structure of spiders in major crops. Journal of Arachnology 27:270-280. PDF
Habitat (published): Both the ground and field layer. Can be collected from spruce branches that sweep the field layer (Hancock, pers. obs.).
Habitat (<30 randomly chosen specimens): Burnt, Aspen Parkland; Dry Grassland;

Life & Natural History: (not yet recorded or unknown)

Image(s) of Habitus:

Description: Unknown

Male Dimensions: (Dimensions not yet available)

Image of External Male Genitalia: email an image

Description: Carapace mottled dark brown with orange eye surrounds and pale median area enclosing mottled area anterior to dorsal groove. Legs pale yellow, sparsely spotted with dark brown. Dorsum of abdomen gray-brown with pairs of gray areas separated by off-white lines and dark brown. Crescent-shaped spermathecae (Dondale & Redner, 1978).

Female Dimensions: A = 2.2 mm  A+B = 5.25 mm  C = 2 mm

Image of Epigynum: Credit: Hancock, John

Descriptions Source:
Dondale, C. D. & J. H. Redner. 1978. The insects and arachnids of Canada, Part 5. The crab spiders of Canada and Alaska, Araneae: Philodromidae and Thomisidae. Research Branch, Agriculture Canada, Publ. 1663: 1-255.

Xysticus posti Sauer 1968 urn:lsid:ubio.org:namebank:1990939

Xysticus posti Dondale & Redner 1978 urn:lsid:ubio.org:namebank:1990940

Dondale, C. D. & J. H. Redner. 1978. The insects and arachnids of Canada, Part 5. The crab spiders of Canada and Alaska, Araneae: Philodromidae and Thomisidae. Research Branch, Agriculture Canada, Publ. 1663: 1-255.

Sauer, R. J. 1968. Two new species of crab spiders (Araneae: Thomisidae) from North Dakota. Can. Ent. 100: 1148-1150.

^‡Nomenclature and taxonomic references from the World Spider Catalog

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