Nearctic States & Provinces: AZ CO IL NH PA SC TX UT
Collection Locales Mapped by Year Collected:
The Nearctic Spider Database, http://www.canadianarachnology.org/data/spiders/8021
Steatoda americana (Emerton, 1882)
twospotted cobweb spider
FAMILY: THERIDIIDAE Sundevall, 1833
Genus: Steatoda Sundevall, 1833
Species: Steatoda americana (Emerton, 1882)
Common Names
Family Common Name:
cobweb weavers
Genus Common Name:
none
Species Common Name:
twospotted cobweb spider
Distribution
Global Distribution: USA, Canada, China
Nearctic States & Provinces:
AZ CO IL NH PA SC TX UT
Collection Locales Mapped by Year Collected:
Natural History, Phenology & Image(s)
Feeding Guild:‡
space 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:
(not yet recorded or unknown)
Life & Natural History:
(not yet recorded or unknown)
Seasonality of Specimen Records:
Image(s) of Habitus:
(images not yet available)
Details About Males
Description:
(not yet recorded or unknown)
Image of External Male Genitalia:
(image not yet available)
Details About Females
Description:
(not yet recorded or unknown)
Image of Epigynum:
(image not yet available)
Synonyms and Chresonyms†
| Asagena americana Emerton 1882 |
| Steatoda americana Emerton 1882 |
| Asagena americana Keyserling 1886 |
| Asagena americana Simon 1894 |
| Asagena americana Emerton 1902 |
| Asagena americana Bishop 1925 |
| Asagena americana Kaston 1948 |
| Steatoda americana Levi 1957 |
| Steatoda americana Knoflach 1996 |
| Steatoda americana Zhu 1998 |
| Steatoda americana Song, Zhu & Chen 1999 |
| Steatoda americana Paquin & Dupérré 2003 |
| Steatoda americana Agnarsson 2004 |
Taxonomic References†
Agnarsson, I. 2004. Morphological phylogeny of cobweb spiders and their relatives (Araneae, Araneoidea, Theridiidae). Zool. J. Linnean Soc. 141: 447-626.
Bishop, S. C. 1925. Singing spiders. New York Stat. Mus. Bull. 260: 65-69.
Emerton, J. H. 1902. The common spiders of the United States. Boston, pp. 1-225.
Emerton, J. H. 1882. New England spiders of the family Theridiidae. Trans. Conn. Acad. Arts Sci. 6: 1-86.
Hu, J. L. & W. G. Wu. 1989. Spiders from agricultural regions of Xinjiang Uygur Autonomous Region, China. Shandong Univ. Publ. House, Jinan, 435 pp.
Kaston, B. J. 1948. Spiders of Connecticut. Bull. Conn. St. geol. nat. Hist. Surv. 70: 1-874.
Keyserling, E. 1886. Die Spinnen Amerikas. Theridiidae. Nürnberg, 2: 1-295.
Knoflach, B. 1996. Die Arten der Steatoda phalerata-Gruppe in Europa (Arachnida: Araneae, Theridiidae). Mitt. schweiz. ent. Ges. 69: 377-404.
Levi, H. W. 1957. The spider genera Crustulina and Steatoda in North America, Central America, and the West Indies (Araneae, Theridiidae). Bull. Mus. comp. Zool. Harv. 117: 367-424.
Paquin, P. & N. Dupérré. 2003. Guide d'identification des araignées de Québec. Fabreries, Suppl. 11 1-251.
Simon, E. 1894. Histoire naturelle des araignées. Paris, 1: 489-760.
Song, D. X., M. S. Zhu & J. Chen. 1999. The Spiders of China. Hebei Sci. Technol. Publ. House, Shijiazhuang, 640 pp.
Zhu, M. S. 1998. Fauna Sinica: Arachnida: Araneae: Theridiidae. Science Press, Beijing, xi + 436 pp.
†Nomenclature and taxonomic references from the World Spider Catalog accessible at http://research.amnh.org/entomology/spiders/catalog/THERIDIIDAE.html
Other Nearctic Members of Genus Steatoda Sundevall, 1833‡‡
S. alamosa Gertsch, 1960 ...............USA, Mexico
S. albomaculata (De Geer, 1778) ...............Cosmopolitan
S. apacheana Gertsch, 1960 ...............USA
S. atascadera Chamberlin & Ivie, 1942 ...............USA
S. bipunctata (Linnaeus, 1758) ...............Holarctic
S. borealis (Hentz, 1850) ...............USA, Canada, Alaska
S. castanea (Clerck, 1757) ...............Palearctic (Canada, introduced)
S. fulva (Keyserling, 1884) ...............USA, Mexico
S. grandis Banks, 1901 ...............USA
S. grossa (C. L. Koch, 1838) ...............Cosmopolitan
S. hespera Chamberlin & Ivie, 1933 ...............USA, Canada
S. medialis (Banks, 1898) ...............USA, Mexico
S. mexicana Levi, 1957 ...............USA, Mexico
S. palomara Chamberlin & Ivie, 1935 ...............USA
S. phalerata (Panzer, 1801) ...............Palearctic
S. pulchra (Keyserling, 1884) ...............USA
S. punctulata (Marx, 1898) ...............USA, Mexico
S. quadrimaculata (O. P.-Cambridge, 1896) ...............USA to Venezuela, West Indies
S. transversa (Banks, 1898) ...............USA, Mexico
S. triangulosa (Walckenaer, 1802) ...............Cosmopolitan
S. variata Gertsch, 1960 ...............USA, Mexico
S. variata china Gertsch, 1960 ...............USA, Mexico
S. washona Gertsch, 1960 ...............USA, Mexico
‡‡May also include species with Palearctic distribution