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Info
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Subfamily Erigoninae - Dwarf Spiders

Dorsal view - Ceratinops crenatus - female Adult Male - Zornella armata - male Adult male - Erigone aletris - male Grammonota gentilis - Grammonota inornata - male Grammonota - Grammonota maculata - female Spider - Hypselistes florens Spider - Grammonota vittata - female Walckenaeria spiralis - male
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Chelicerata (Chelicerates)
Class Arachnida (Arachnids)
Order Araneae (Spiders)
Infraorder Araneomorphae (True Spiders)
No Taxon (Entelegynae)
Family Linyphiidae (Sheetweb and Dwarf Spiders)
Subfamily Erigoninae (Dwarf Spiders)
Other Common Names
In the United States they are called "dwarf spiders," in England "money spiders," and in German they are known under the common name of "Zwergspinnen."(1)
Numbers
About 650 species and 122 genera of erigonines known in America north of Mexico. (1)
Size
1 to 6 mm (most are about 2 mm)
Internet References
(1) PDF Article, Gustavo Hormiga - Higher Level Phylogenetics of Erigonine Spiders.

(2) The LinEpig project displays digital images of the epigynes (female external sex organs) for identified specimens of Erigoninae in North America.