Nearctic States & Provinces: AB
Collection Locales Mapped by Year Collected:
The Nearctic Spider Database, http://www.canadianarachnology.org/data/spiders/32029
Xysticus posti Sauer, 1968
FAMILY: THOMISIDAE Sundevall, 1833
Genus: Xysticus C. L. Koch, 1835
Species: Xysticus posti Sauer, 1968
Author of this page: Hancock, John (Page complete and awaiting review)
Common Names
Family Common Name:
crab spiders
Genus Common Name:
ground crab spiders
Species Common Name:
none
Distribution
Global Distribution: USA
Nearctic States & Provinces:
AB
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. Can be collected from spruce branches that sweep the field layer (Hancock, pers. obs.).
Life & Natural History:
(not yet recorded or unknown)
Seasonality of Specimen Records:
Image(s) of Habitus:
Credit: Hancock, John
Details About Males
Description:
Unknown
Image of External Male Genitalia:
(image not yet available)
Details About Females
Description:
Carapace mottled dark brown with orange eye surrounds and pale median area enclosing mottled area anterior to dorsal groove. Legs pale yellow, sparsely spotted with dark brown. Dorsum of abdomen gray-brown with pairs of gray areas separated by off-white lines and dark brown. Crescent-shaped spermathecae (Dondale & Redner, 1978).
Female Dimensions:
A+B = 5.25 mm
A = 2.2 mm
C = 2 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.
Synonyms and Chresonyms†
| Xysticus posti Sauer 1968 |
| Xysticus posti 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.
Sauer, R. J. 1968. Two new species of crab spiders (Araneae: Thomisidae) from North Dakota. Can. Ent. 100: 1148-1150.
†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. 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 posti Sauer, 1968.
In: The Nearctic Spider Database. David P. Shorthouse (editor). World Wide Web electronic publication. Direct link: http://www.canadianarachnology.org/data/spiders/32029 (Accessed: 10/13/2008 12:46:25 AM).
Author Email Address: spidermanjohn@shaw.ca
Text Last Modified: 2006-02-26T23:39:21Z