Nearctic States & Provinces: AB BC AK CA WA
Collection Locales Mapped by Year Collected:
The Nearctic Spider Database, http://www.canadianarachnology.org/data/spiders/32031
Xysticus pretiosus Gertsch, 1934
FAMILY: THOMISIDAE Sundevall, 1833
Genus: Xysticus C. L. Koch, 1835
Species: Xysticus pretiosus Gertsch, 1934
Author of this page: Hancock, John (Page complete and awaiting review)
General Comments: Lay-in-wait predator, particular among grass and flower heads (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 BC AK CA WA
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:
Most often encountered among the 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 dark brown with pale median area enclosing pale V, with brown area anterior to dorsal groove. Legs mottled dark brown and yellow. Dorsum of abdomen with pairs of dark spots separated by pale bands along midline, and with some pale transverse bands. Transversely oriented tegular apophyses of the palp (Dondale & Redner, 1978).
Male Dimensions:
A+B = 3.25 mm
A = 2.54 mm
C = 2.35 mm
Image of External Male Genitalia:
Credit: Hancock, John
Details About Females
Description:
Carapace pale brown and pale median area enclosing pale V, with brown area anterior to dorsal groove. Legs mottled dark brown and yellow. Dorsum of abdomen with pairs of dark spots separated by pale bands along midline, and with some pale transverse bands. Small, widely separated atrial sclerites and plump spermathecae (Dondale & Redner, 1978).
Female Dimensions:
A+B = 4.75 mm
A = 2.5 mm
C = 2.3 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 pretiosus Gertsch 1934 |
| Xysticus pretiosus Gertsch 1939 |
| Xysticus pretiosus Schick 1965 |
| Xysticus pretiosus Turnbull, Dondale & Redner 1965 |
| Xysticus pretiosus Dondale & Redner 1978 |
Taxonomic References†
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. 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.
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. locuples Keyserling, 1880 ...............USA, Canada
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. 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 pretiosus Gertsch, 1934.
In: The Nearctic Spider Database. David P. Shorthouse (editor). World Wide Web electronic publication. Direct link: http://www.canadianarachnology.org/data/spiders/32031 (Accessed: 7/20/2008 9:17:11 PM).
Author Email Address: spidermanjohn@shaw.ca
Text Last Modified: 2006-02-26T23:43:50Z