Nearctic States & Provinces: AB SK MT NH
Collection Locales Mapped by Year Collected:
The Nearctic Spider Database, http://www.canadianarachnology.org/data/spiders/22593
Amaurobius borealis Emerton, 1909
FAMILY: AMAUROBIIDAE Thorell, 1870
Genus: Amaurobius C. L. Koch, 1837
Species: Amaurobius borealis Emerton, 1909
Author of this page: Shorthouse, David P. (Page complete and awaiting review)
Common Names
Family Common Name:
hackledmesh weavers
Genus Common Name:
none
Species Common Name:
none
Distribution
Global Distribution: USA, Canada
Nearctic States & Provinces:
AB SK MT NH
Collection Locales Mapped by Year Collected:
Natural History, Phenology & Image(s)
Feeding Guild:‡
sheet web builders
‡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:
under logs and small stones, in deep leaf litter of deciduous and coniferous forests, bogs
Life & Natural History:
Males have been collected from April to October (May is the peak period) while females have been collected from May to November. Black flies are part of this species' diet
Seasonality of Specimen Records:
Image(s) of Habitus:
Credit: Hancock, John
Details About Males
Description:
Unformly light brown. Femora paler than carapace and legs darker to their distal ends. Femora and patellae of palpi same color pattern as legs, but tibiae and cymbiae are darker. Opisthosoma pale or dark grey with pale anterior region on dorsal surface with chevrons toward posterior end or unmarked.
Male Dimensions:
A+B = 5 mm
A = 2.2 mm
C = 1.6 mm
Image of External Male Genitalia:
(image not yet available)
Details About Females
Description:
Carapace pale yellow-brown and slightly darker toward anterior end. Much the same as males.
Female Dimensions:
A+B = 6 mm
A = 2.2 mm
C = 1.5 mm
Image of Epigynum:
(image not yet available)
Descriptions Source:
Leech, R. E. 1972. A revision of the Nearctic Amaurobiidae (Arachnida: Araneida). Mem. ent. Soc. Can. 84: 1-182.
Synonyms and Chresonyms†
| Amaurobius borealis Emerton 1909 |
| Walmus borealis Chamberlin 1947 |
| Callioplus borealis Kaston 1948 |
| Amaurobius borealis Leech 1972 |
| Amaurobius borealis Paquin & Dupérré 2003 |
Taxonomic References†
Chamberlin, R. V. 1947. A summary of the known North American Amaurobiidae. Bull. Univ. Utah 38(8): 1-31.
Emerton, J. H. 1909. Supplement to the New England Spiders. Trans. Connect. Acad. Arts Sci. 14: 171-236.
Kaston, B. J. 1948. Spiders of Connecticut. Bull. Conn. St. geol. nat. Hist. Surv. 70: 1-874.
Leech, R. E. 1972. A revision of the Nearctic Amaurobiidae (Arachnida: Araneida). Mem. ent. Soc. Can. 84: 1-182.
Paquin, P. & N. Dupérré. 2003. Guide d'identification des araignées de Québec. Fabreries, Suppl. 11 1-251.
†Nomenclature and taxonomic references from the World Spider Catalog accessible at http://research.amnh.org/entomology/spiders/catalog/AMAUROBIIDAE.html
Natural History References
Aitchison-Benell, C. W. & C. D. Dondale. 1990. A checklist of Manitoba spiders (Araneae) with notes on geographic relationships. Naturaliste can. 117: 215-237.
Leech, R. E. 1972. A revision of the Nearctic Amaurobiidae (Arachnida: Araneida). Mem. ent. Soc. Can. 84: 1-182.
Other Nearctic Members of Genus Amaurobius C. L. Koch, 1837‡‡
A. agastus (Chamberlin, 1947) ...............USA
A. barbaricus Leech, 1972 ...............USA
A. corruptus Leech, 1972 ...............USA
A. diablo Leech, 1972 ...............USA
A. distortus Leech, 1972 ...............USA
A. dorotheae (Chamberlin, 1947) ...............USA
A. ferox (Walckenaer, 1830) ...............Holarctic
A. galeritus Leech, 1972 ...............USA
A. hagiellus (Chamberlin, 1947) ...............USA
A. heathi (Chamberlin, 1947) ...............USA
A. intermedius Leech, 1972 ...............USA
A. latescens (Chamberlin, 1919) ...............USA
A. leechi Brignoli, 1983 ...............USA
A. mathetes (Chamberlin, 1947) ...............USA
A. mephisto (Chamberlin, 1947) ...............USA
A. minutus Leech, 1972 ...............USA
A. palomar Leech, 1972 ...............USA
A. prosopidus Leech, 1972 ...............USA
A. similis (Blackwall, 1861) ...............Holarctic
A. tamalpais Leech, 1972 ...............USA
A. transversus Leech, 1972 ...............USA
A. triangularis Leech, 1972 ...............USA
A. tulare Leech, 1972 ...............USA
A. vexans Leech, 1972 ...............USA
‡‡May also include species with Palearctic distribution
Page Reference:
Shorthouse, David P. submitted. Taxonomic and natural history description of FAM: AMAUROBIIDAE, Amaurobius borealis Emerton, 1909.
In: The Nearctic Spider Database. David P. Shorthouse (editor). World Wide Web electronic publication. Direct link: http://www.canadianarachnology.org/data/spiders/22593 (Accessed: 7/20/2008 9:17:44 PM).
Author Email Address: dshorthouse@eol.org
Text Last Modified: 2005-07-31T20:28:52Z