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Xysticus triguttatus Keyserling, 1880

threebanded crab spider

	FAMILY: THOMISIDAE Sundevall, 1833     Genus: Xysticus C. L. Koch, 1835         Species: Xysticus triguttatus Keyserling, 1880
	Author: Hancock, John Page views: 1,103 Write a Review: Visitor Comments: (0)

General Comments: This species is mostly ground dwelling, at night often hunts the field layers (Hancock, pers. obs.).

Family Common Name:  crab spiders
Genus Common Name:  ground crab spiders
Species Common Name:  threebanded crab spider

Global Distribution: USA, Canada
Nearctic States & Provinces: (from the Nearctic Spider Database)   AB AZ CA CO CT IL MT NH OK SC WY
Collection Locales Mapped by Year Collected: (from the Nearctic Spider Database)

Specimen Search Specimen list 84, 67

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
Recorded Habitats: Grasslands, on herbs and shrubs (Dondale & Redner, 1978).
Life & Natural History: (not yet recorded or unknown)

Seasonality of Specimen Records: (from the Nearctic Spider Database - Requires Flash plug-in - refresh this page if not visible)

Image(s) of Habitus:

Description: Carapace dark-red to brown, with white V mark and dark area anterior to dorsal groove; posterior declivity with pair of dark spots. Legs brown or yellow, flecked with dark brown. Abdomen with pairs of brown areas separated by off-white lines. Distinctively flattened distal part of the embolus (Dondale & Redner, 1978).

Male Dimensions: A = 2.05 mm  A+B = 3.25 mm  C = 1.96 mm

Image of External Male Genitalia: Credit: Slowik, Joey

Description: Carapace brown, with off-white V mark and dark lateral bands, posterior declivity with pair of dark spots. Legs brown or yellow, flecked with dark brown, leg IV darker. Abdomen with pairs of brown areas separated by yellow lines. Slender short copulatory tubes and lack of atrial extensions ti the epigynum (Dondale & Redner, 1978).

Female Dimensions: A = 2.13 mm  A+B = 4 mm  C = 2.03 mm

Image of Epigynum: Credit: Slowik, Joey

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 triguttatus Keyserling 1880 urn:lsid:ubio.org:namebank:1991245

Xysticus feroculus Keyserling 1881 urn:lsid:ubio.org:namebank:1991246

Xysticus feroculus Banks 1892 urn:lsid:ubio.org:namebank:1991247

Xysticus triguttatus Emerton 1892 urn:lsid:ubio.org:namebank:1991248

Xysticus triguttatus Emerton 1902 urn:lsid:ubio.org:namebank:1991251

Xysticus triguttatus Comstock 1912 urn:lsid:ubio.org:namebank:1991252

Xysticus triguttatus Peelle & Saito 1933 urn:lsid:ubio.org:namebank:1991253

Xysticus triguttatus Gertsch 1939 urn:lsid:ubio.org:namebank:1991254

Xysticus triguttatus Chickering 1940 urn:lsid:ubio.org:namebank:1991255

Xysticus triguttatus Muma 1943 urn:lsid:ubio.org:namebank:1991256

Xysticus triguttatus Kaston 1948 urn:lsid:ubio.org:namebank:1991257

Xysticus triguttatus Saito 1959 urn:lsid:ubio.org:namebank:2008513

Xysticus triguttatus Turnbull, Dondale & Redner 1965 urn:lsid:ubio.org:namebank:1991258

Xysticus triguttatus Dondale & Redner 1978 urn:lsid:ubio.org:namebank:1991259

Xysticus triguttatus Paquin & Dupérré 2003 urn:lsid:ubio.org:namebank:9736770

Banks, N. 1892. The spider fauna of the Upper Cayuga Lake Basin. Proc. Acad. nat. Sci. Philad. 1892: 11-81.

Chickering, A. M. 1940. The Thomisidae (crab spiders) of Michigan. Pap. Michigan Acad. Sci. Arts Lett. 25: 189-237.

Comstock, J. H. 1912. The spider book; a manual for the study of the spiders and their near relatives, the scorpions, pseudoscorpions, whipscorpions, harvestmen and other members of the class Arachnida, found in America north of Mexico, with analytical keys for their classification and popular accounts of their habits. Garden City, New York, pp. 1-721

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.

Emerton, J. H. 1902. The common spiders of the United States. Boston, pp. 1-225.

Emerton, J. H. 1892. New England spiders of the family Thomisidae. Trans. Connect. Acad. Arts Sci. 8: 359-381.

Gertsch, W. J. 1939. A revision of the typical crab spiders (Misumeninae) of America north of Mexico. Bull. Amer. Mus. Nat. Hist. 76: 277-442.

Kaston, B. J. 1948. Spiders of Connecticut. Bull. Conn. St. geol. nat. Hist. Surv. 70: 1-874.

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.

Muma, M. H. 1943. Common spiders of Maryland. Natural History Society of Maryland, Baltimore, 179 pp.

Paquin, P. & N. Dupérré. 2003. Guide d'identification des araignées de Québec. Fabreries, Suppl. 11 1-251.

Peelle, M. L. & S. Saito. 1933. Spiders from the southern Kurile Islands. II. Araneida from Shikotan. Jour. Fac. Sci. Hokkaido Zool. (6) 2: 109-123.

Saito, S. 1959. The Spider Book Illustrated in Colours. Hokuryukan, Tokyo, 194 pp.

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

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.

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