Linyphiidae  Blackwall, 1859 / Mermessus  O. P.-Cambridge, 1899   2 species

Mermessus denticulatus  (Banks, 1898)


Tibial apophysis pointed. Epigyne with caudally protruding median plate. Prosoma orange-brown, sometimes darker anteriorly. Sternum orange-brown. Legs brown, to orange-brown. Opisthosoma grey-black, sometimes pale.

Body length male: 1.9-2.5 mm
Body length female: 2.8-3.3 mm
Additional information

Probably brought to Europe from North America together with ornamental plants at the end of the eighties

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.

Frequency: Widely distributed

Character states from linyphiid key
  No data
Global distribution (WSC 2019): Canada to Peru, Caribbean. Introduced to Europe, North Africa, Turkey

Bosmans R. (unpubl.) Spiders of North Africa. Database excerpt Aug. 2019

Danışman T, Coşar İ (2019a) Occurence of the alien spider Mermessus denticulatus (Banks, 1898) (Araneae: Linyphiidae) in Turkey. Munis Entomology and Zoology 14: 80-82 pdf

Hänggi A, Stäubli A (2012) Nachträge zum „Katalog der schweizerischen Spinnen“: 4. Neunachweise von 2002 bis 2011. Arachnologische Mitteilungen 44: 59-76

Helsdingen P J van (2009b) Mermessus denticulatus (Banks, 1898) and Mermessus trilobatus (Emerton, 1882), adventive species in the Netherlands (Araneae, Linyphiidae). Contrib nat Hist 12: 617-626

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

Millidge A F (1987) The Erigonine spiders of North America. Part 8. The Genus Eperigone Crosby and Bishop (Araneae, Linyphiidae). American Museum Novitates 2885: 1-75

Oger P, Picard J (2014) Découverte en France de Mermessus denticulatus (Banks, 1898) (Araneae, Linyphiidae). Rev arachnol (2) 1: 2-4

Pantini P, Isaia M (2018) Checklist of the Italian spiders (version June 2018). online at pdf

Trotta A (2012) Nota su alcuni ragni raccolti in una azienda agricola liguree prima segnalazione italiana di Mermessus denticulatus (Araneae). Bollettino della Società Entomologica Italiana 144: 3-6 pdf

World Spider Catalog (2019) World Spider Catalog, version 20.0. Natural History Museum Bern, online at (20.01.2019) doi: 10.24436/2

17-01-2019 Distribution update Old value
20-05-2014 Distribution update Old value