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Xysticus benefactor Keyserling, 1880

	FAMILY: THOMISIDAE Sundevall, 1833     Genus: Xysticus C. L. Koch, 1835         Species: Xysticus benefactor Keyserling, 1880
	Author: Hancock, John Page views: 1,166 Write a Review: Visitor Comments: (0)

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

Global Distribution: USA, Canada
Nearctic States & Provinces: AB CO MT SD WY

Seasonality Specimen Search Specimen list 21, 16

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): Field and shrub layers particularly in old forest stands. Most often in humid habitats close to water (Hancock, pers. obs.).
Habitat (<30 randomly chosen specimens): Lodgepole Pine Burnt Forest; Lodgepole Pine closed Forest; Riparian, Alpine Lakeside; Dry Grassland;

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

Image(s) of Habitus:

Description: Carapace a dark mottled red-brown with yellow and white, white V and mottled pigment anterior to dorsal groove. Legs mottled dark red-brown and yellow. Dorsun of abdomen with paired dark areas separated by off-white transverse lines. Spurlike tegular ridge and short embolus (Dondale & Redner, 1978).

Male Dimensions: A = 2.11 mm  A+B = 3.75 mm  C = 2.11 mm

Image of External Male Genitalia: Credit: Hancock, John

Description: Carapace a light mottled red-brown with yellow and white, white V and mottled pigment anterior to dorsal groove. Legs mottled light red-brown and yellow. Dorsun of abdomen with paired dark areas separated by off-white transverse lines. Rimless epigynal atrium (Dondale & Redner, 1978).

Female Dimensions: A = 2.25 mm  A+B = 5.25 mm  C = 2.24 mm

Image of Epigynum: email an image

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 benefactor Keyserling 1880 urn:lsid:ubio.org:namebank:2107188

Xysticus vernilis Keyserling 1881 urn:lsid:ubio.org:namebank:2107189

Xysticus benefactor Banks 1913 urn:lsid:ubio.org:namebank:2107190

Xysticus benefactor Schick 1965 urn:lsid:ubio.org:namebank:2107192

Xysticus benefactor Turnbull, Dondale & Redner 1965 urn:lsid:ubio.org:namebank:2107193

Xysticus benefactor Dondale & Redner 1978 urn:lsid:ubio.org:namebank:2107194

Xysticus benefactor Redner & Dondale 1980 urn:lsid:ubio.org:namebank:9736386

Banks, N. 1913. Notes on the types of some American spiders in European collections. Proc. Acad. nat. Sci. Philad. 65: 177-188.

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.

Keyserling, E. 1881. Neue Spinnen aus Amerika. III. Verh. zool.-bot. Ges. Wien 31: 269-314.

Keyserling, E. 1880. Die Spinnen Amerikas, I. Laterigradae. Nürnberg, 1: 1-283.

Redner, J. H. & C. D. Dondale. 1980. Description of the female of Xysticus winnipegensis (Araneae: Thomisidae). Can. Ent. 112: 933-934.

Schick, R. X. 1965. The crab spiders of California (Araneae, Thomisidae). Bull. Am. Mus. nat. Hist. 129: 1-180.

Turnbull, A. L., C. D. Dondale & J. H. Redner. 1965. The spider genus Xysticus C. L. Koch (Araneae: Thomisidae) in Canada. Can. Ent. 97: 1233-1280.

^‡Nomenclature and taxonomic references from the World Spider Catalog

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