Resources:
Linyphiidae  Blackwall, 1859 / Erigone  Audouin, 1826   30 species

Erigone aletris  Crosby & Bishop, 1928

Description

Tibial apophysis with pointed triangular dorsal process. Epigyne bent upward and viewed from posterior ± triangular. Receptacula seminis not visible through epigyne.

Body length male: 1.7-2.1 mm
Body length female: 2.1-2.2 mm
Additional information

This species of North American origin is not native to Europe (alien species). It had been introduced to Europe at least once and did establish.

Character states from linyphiid key
Distribution
  Presence
  No data
Global distribution (WSC 2018): USA, Canada. Introduced to Britain, Italy
Phenology
JanFebMarAprMayJunJulAugSepOctNovDec
 male  female
Figures
References

Helsdingen P J van (2010a) Araneae. In: Fauna Europaea Database (Version 2010.1), online at www.european-arachnology.org

Pantini P, Isaia M (2017) Checklist of the Italian spiders (version May 2017). online at http://www.museoscienzebergamo.it/web/index.php?option=com_content&view=category&layout=blog&id=96&Itemid=94 pdf

Roberts M J (1987) The spiders of Great Britain and Ireland. Volume 2: Linyphiidae and checklist. Harley Books Colchester

Wilson R (2015) Philodromus buxi and Anyphaena sabina: two new records for the UK. Newsl Br Arachnol Soc 132: 17-19 pdf

World Spider Catalog (2018) World Spider Catalog, version 19.5. Natural History Museum Bern, online at http://wsc.nmbe.ch (15.07.2018) doi: 10.24436/2