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Xysticus montanensis Keyserling, 1887

	FAMILY: THOMISIDAE Sundevall, 1833     Genus: Xysticus C. L. Koch, 1835         Species: Xysticus montanensis Keyserling, 1887
	Author: Hancock, John Page views: 739 Write a Review: Visitor Comments: (0)

General Comments: Specimens have been observed partly concealed under fallen branches (Hancock, pers. obs.).

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

Global Distribution: USA, Canada, Alaska
Nearctic States & Provinces: (from the Nearctic Spider Database)   AB ON CA CO MT WY
Collection Locales Mapped by Year Collected: (from the Nearctic Spider Database)

Specimen Search Specimen list 6, 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
Recorded Habitats: Litter in wooded areas, fields (Dondale & Redner, 1978). Has been collected in Foothills Parkland, most often found on grassland (Hancock, pers. obs.).
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-brown, mottled with lighter pigment. Legs red-brown to nearly black particularly the tibia I & II, and flecked with off-white towards base. Dorsum of abdomen light brown to dark brown, with few scattered dark marks. Tegular ridge is located near the prolaterobasal margin of the tegulum and the large knob on the ventral tibial apophysis (Dondale & Redner, 1978).

Male Dimensions: A = 2.05 mm  A+B = 3.3 mm  C = 1.94 mm

Image of External Male Genitalia: Credit: Hancock, John

Description: Carapace dark red-brown, mottled with lighter pigment. Legs red-brown to nearly black particularly the tibia I & II, and flecked with off-white towards base. Dorsum of abdomen light brown to dark brown, with few scattered dark marks, noticeably more setaceous. Long, ridged median septum of the epigynum (Dondale & Redner, 1978).

Female Dimensions: A = 2.22 mm  A+B = 5.6 mm  C = 2.14 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 montanensis Keyserling 1887 urn:lsid:ubio.org:namebank:1990800

Xysticus montanensis Banks 1901 urn:lsid:ubio.org:namebank:1990801

Xysticus hesperus Gertsch 1934 urn:lsid:ubio.org:namebank:1990802

Xysticus montanensis Gertsch 1939 urn:lsid:ubio.org:namebank:1990803

Xysticus montanensis Gertsch 1953 urn:lsid:ubio.org:namebank:1990804

Xysticus montanensis Schick 1965 urn:lsid:ubio.org:namebank:1990806

Xysticus montanensis Turnbull, Dondale & Redner 1965 urn:lsid:ubio.org:namebank:1990807

Xysticus montanensis Dondale & Redner 1978 urn:lsid:ubio.org:namebank:1990808

Xysticus montanensis Paquin & Dupérré 2003 urn:lsid:ubio.org:namebank:9736765

Banks, N. 1901. Some Arachnida from New Mexico. Proc. Acad. nat. Sci. Philad. 53: 568-597.

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.

Gertsch, W. J. 1953. The spider genera Xysticus, Coriarachne and Oxyptila (Thomisidae, Misumeninae) in North America. Bull. Am. Mus. Nat. Hist. 102: 415-482.

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.

Gertsch, W. J. 1934. Notes on American crab spiders (Thomisidae). Amer. Mus. Novit. 707: 1-25.

Keyserling, E. 1887. Neue Spinnen aus America. VII. Verh. zool.-bot. Ges. Wien 37: 421-490.

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

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

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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