The Nearctic Spider Database, http://www.canadianarachnology.org/data/spiders/31971

Xysticus locuples Keyserling, 1880

FAMILY: THOMISIDAE Sundevall, 1833
    Genus: Xysticus C. L. Koch, 1835
        Species: Xysticus locuples Keyserling, 1880

Author of this page: Hancock, John (Page complete and awaiting review)

General Comments: Known to ascend into the field layer at night where it may be taken with a sweep-net (Hancock, pers. obs.).

Common Names

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

Distribution

Global Distribution: USA, Canada
Nearctic States & Provinces:   AB CO MT NM
Collection Locales Mapped by Year Collected: 

Natural History, Phenology & Image(s)

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.
Recorded Habitats:  Both the ground and field layer (Hancock, pers. obs.).
Life & Natural History:  (not yet recorded or unknown)

Seasonality of Specimen Records:


Image(s) of Habitus:


Credit: Slowik, Joey


Credit: Hancock, John

Details About Males

Description:  Carapace dull red-brown with pale V, and with mottled area anterior to dorsal groove. Legs mottled red-brown and off-white. Dorsum of abdomen with pairs of brown areas separated by off-white median and transverse lines. Palpal cymbium is conspicuously swollen along the prolaterodistal margin and a fingerlike conductor tip (Dondale & Redner, 1978).

Male Dimensions:

A+B = 4.5 mm  A = 2.22 mm  C = 2.07 mm 

Image of External Male Genitalia:


Credit: Hancock, John

Details About Females

Description:  Carapace pale red-brown with pale V, and with mottled area anterior to dorsal groove. Legs mottled red-brown and off-white. Dorsum of abdomen with pairs of brown areas separated by off-white median and transverse lines. Flattened epigynal septum with thickened margins and more broadly looped copulatory tubes (Dondale & Redner, 1978).

Female Dimensions:

A+B = 6.5 mm  A = 3.29 mm  C = 3.12 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.

Synonyms and Chresonyms†

Xysticus locuples Keyserling 1880
Xysticus bicuspis Banks 1901
Xysticus locuples Banks 1913
Xysticus locuples Gertsch 1939
Xysticus locuples Gertsch 1953
Xysticus malkini Gertsch 1953
Xysticus locuples Schick 1965
Xysticus locuples Turnbull, Dondale & Redner 1965
Xysticus locuples Dondale & Redner 1978

Taxonomic References†

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

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.

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

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 accessible at http://research.amnh.org/entomology/spiders/catalog/THOMISIDAE.html

Other Nearctic Members of Genus Xysticus C. L. Koch, 1835‡‡

X. acquiescens Emerton, 1919 ...............Holarctic
X. alboniger Turnbull, Dondale & Redner, 1965 ...............USA, Canada
X. ampullatus Turnbull, Dondale & Redner, 1965 ...............USA, Canada
X. apachecus Gertsch, 1933 ...............USA
X. apalacheus Gertsch, 1953 ...............USA
X. aprilinus Bryant, 1930 ...............USA
X. auctificus Keyserling, 1880 ...............USA, Canada
X. audax (Schrank, 1803) ...............Palearctic
X. banksi Bryant, 1933 ...............USA
X. benefactor Keyserling, 1880 ...............USA, Canada
X. bicuspis Keyserling, 1887 ...............USA
X. bifasciatus C. L. Koch, 1837 ...............Palearctic
X. bonneti Denis, 1938 ...............Palearctic
X. britcheri Gertsch, 1934 ...............Russia, Alaska, Canada, USA
X. californicus Keyserling, 1880 ...............USA
X. canadensis Gertsch, 1934 ...............Russia, USA, Canada
X. chaparralis Schick, 1965 ...............USA
X. chippewa Gertsch, 1953 ...............Holarctic
X. cochise Gertsch, 1953 ...............USA
X. coloradensis Bryant, 1930 ...............USA
X. concursus Gertsch, 1934 ...............USA
X. cristatus (Clerck, 1757) ...............Palearctic
X. cunctator Thorell, 1877 ...............USA, Canada
X. deichmanni Sorensen, 1898 ...............Canada, Alaska, Greenland
X. discursans Keyserling, 1880 ...............North America
X. durus (Sorensen, 1898) ...............USA, Canada, Greenland
X. elegans Keyserling, 1880 ...............USA, Canada, Alaska
X. ellipticus Turnbull, Dondale & Redner, 1965 ...............USA, Canada
X. emertoni Keyserling, 1880 ...............USA, Canada, Alaska, Slovakia to China
X. facetus O. P.-Cambridge, 1896 ...............Mexico to El Salvador
X. ferox (Hentz, 1847) ...............USA, Canada
X. ferrugineus Menge, 1876 ...............Palearctic
X. fervidus Gerstch, 1953 ...............USA, Canada
X. flavovittatus Keyserling, 1880 ...............USA
X. floridanus Banks, 1896 ...............USA
X. fraternus Banks, 1895 ...............USA, Canada
X. funestus Keyserling, 1880 ...............North America
X. furtivus Gertsch, 1936 ...............USA
X. gallicus Simon, 1875 ...............Palearctic
X. gertschi Schick, 1965 ...............North America
X. gosiutus Gertsch, 1932 ...............USA, Canada
X. gulosus Keyserling, 1880 ...............North America
X. humilis Redner & Dondale, 1965 ...............USA
X. imitarius Gertsch, 1953 ...............USA
X. indiligens (Walckenaer, 1837) ...............USA
X. iviei Schick, 1965 ...............USA
X. iviei sierrensis Schick, 1965 ...............USA
X. keyserlingi Bryant, 1930 ...............USA, Canada
X. labradorensis Keyserling, 1887 ...............Holarctic
X. lanio C. L. Koch, 1835 ...............Palearctic
X. lassanus Chamberlin, 1925 ...............USA, Mexico
X. laticeps Bryant, 1933 ...............USA, Cuba
X. lineatus (Westring, 1851) ...............Palearctic
X. luctans (C. L. Koch, 1845) ...............USA, Canada
X. luctator L. Koch, 1870 ...............Palearctic
X. luctuosus (Blackwall, 1836) ...............Holarctic
X. lutzi Gertsch, 1935 ...............USA, Mexico
X. montanensis Keyserling, 1887 ...............USA, Canada, Alaska
X. nevadensis (Keyserling, 1880) ...............USA
X. nigromaculatus Keyserling, 1884 ...............USA, Canada
X. ninnii Thorell, 1872 ...............Palearctic
X. obscurus Collett, 1877 ...............Holarctic
X. ocala Gertsch, 1953 ...............USA
X. ontariensis Emerton, 1919 ...............Canada
X. orizaba Banks, 1898 ...............Mexico
X. paiutus Gertsch, 1933 ...............USA, Mexico
X. pearcei Schick, 1965 ...............USA
X. pellax O. P.-Cambridge, 1894 ...............North America
X. peninsulanus Gertsch, 1934 ...............USA
X. posti Sauer, 1968 ...............USA
X. pretiosus Gertsch, 1934 ...............USA, Canada
X. punctatus Keyserling, 1880 ...............USA, Canada
X. robinsoni Gertsch, 1953 ...............USA, Mexico
X. rockefelleri Gertsch, 1953 ...............Mexico
X. rugosus Buckle & Redner, 1964 ...............Russia, Canada, USA
X. sabulosus (Hahn, 1832) ...............Palearctic
X. sphericus (Walckenaer, 1837) ...............USA
X. striatipes L. Koch, 1870 ...............Palearctic
X. tampa Gertsch, 1953 ...............USA
X. texanus Banks, 1904 ...............USA, Mexico
X. triangulosus Emerton, 1894 ...............USA, Canada, Alaska
X. triguttatus Keyserling, 1880 ...............USA, Canada
X. ulmi (Hahn, 1831) ...............Palearctic
X. variabilis Keyserling, 1880 ...............USA
X. viduus Kulczynski, 1898 ...............Palearctic
X. winnipegensis Turnbull, Dondale & Redner, 1965 ...............Canada

‡‡May also include species with Palearctic distribution

Page Reference:

Hancock, John. submitted. Taxonomic and natural history description of FAM: THOMISIDAE, Xysticus locuples Keyserling, 1880. In: The Nearctic Spider Database. David P. Shorthouse (editor). World Wide Web electronic publication. Direct link: http://www.canadianarachnology.org/data/spiders/31971 (Accessed: 10/13/2008 1:00:11 PM).

Author Email Address: spidermanjohn@shaw.ca
Text Last Modified: 2006-02-26T23:13:34Z