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Theridion agrifoliae Levi, 1957

	FAMILY: THERIDIIDAE Sundevall, 1833     Genus: Theridion Walckenaer, 1805         Species: Theridion agrifoliae Levi, 1957
	Author: Hancock, John Page views: 867 Write a Review: Visitor Comments: (0)

Family Common Name:  cobweb weavers
Genus Common Name:  none
Species Common Name:  none

Global Distribution: USA, Canada
Nearctic States & Provinces: BC

Seasonality Specimen Search Specimen list 0, 4

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. PDF
Habitat (published): Coastal conifer forest, among shrub and field layers. Also salt-marsh field layer.
Habitat (<30 randomly chosen specimens): Coastal Mixed open Forest; Coastal Mixed Forest;

Life & Natural History: Female observed with large egg-sac in a green curled leaf 6' above the ground.

Image(s) of Habitus:

Description: Carapace yellow, with a narrow marginal line and an indistinct median dusky band as wide as eye region in front, narrower behind. Sternum yellow-white. Legs yellow, distal ends of tibiae darker, or with indistinct bands. Abdomen white, with median dorsal white band between some gray marks, or dorsum spotted gray and black with scalloped median white band and gray to black streaks on sides. Small mastidia on each chelicera. Palpus differentiates this species from others (Levi, 1957).

Male Dimensions: A = 1.46 mm  A+B = 3.1 mm  C = 1.2 mm

Image of External Male Genitalia: email an image

Description: Carapace yellow-white, with a narrow marginal line and an indistinct median dusky band as wide as eye region in front, narrower behind. Sternum yellow-white. Legs yellow-white, distal ends of tibiae darker, orwith indistinct bands. Abdomen white, with median dorsal white band between some gray marks, or dorsum spotted gray and black with scalloped median white band and gray to black streaks on sides. Two teeth on anterior margin of each chelicera. Epigynum with pair dark spots, and opening close to posterior margin (Levi, 1957).

Female Dimensions: A = 1.36 mm  A+B = 3.5 mm  C = 1.17 mm

Image of Epigynum: Credit: Hancock, John

Descriptions Source:
Levi, H. W. 1957. The spider genera Enoplognatha, Theridion, and Paidisca in America north of Mexico (Araneae, Theridiidae). Bull. Am. Mus. nat. Hist. 112: 1-124.

Theridion agrifoliae Levi 1957 urn:lsid:ubio.org:namebank:2029133

Levi, H. W. 1957. The spider genera Enoplognatha, Theridion, and Paidisca in America north of Mexico (Araneae, Theridiidae). Bull. Am. Mus. nat. Hist. 112: 1-124.

^‡Nomenclature and taxonomic references from the World Spider Catalog

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