Linyphiidae  Blackwall, 1859 / Mermessus  O. Pickard-Cambridge, 1899   3 species

Mermessus trilobatus  (Emerton, 1882)


Tibial apophysis rounded. Epigyne with caudally protruding lateral plates. Prosoma yellow-brown to orange-brown. Sternum orange. Legs brown to orange-brown. Opisthosoma grey to black.

Body length male: 1.6-2.1 mm
Body length female: 1.6-2.1 mm
Additional information

In meadows, in litter layer of forests, in humid areas and sandy beaches. Widely distributed in North America, presumably imported to south-western Germany in the 1970ies by the US Army and dispersed from there.

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: Frequent

Character states from linyphiid key
  No data
Global distribution (WSC 2021): North America. Introduced to Azores, Europe
 male  female
Distribution List
Austria   (no references) ||| Belgium   (no references) ||| Croatia   (no references) ||| Czechia   (Řezáč et al., 2021) ||| France   (no references) ||| Germany   (no references) ||| Hungary   (Mezőfi & Markó, 2018) ||| Italy   (Pantini & Isaia, 2019) ||| Luxembourg   (Kreuels et al., 2019) ||| Netherlands   (no references) ||| Poland   (Rozwałka, 2010) ||| Serbia   (Grbić et al., 2021) ||| Slovakia   (Šestáková et al., 2017) ||| Slovenia   (Kostanjšek & Kuntner, 2015) ||| Switzerland   (no references) ||| Ukraine   (Hirna, 2017) ||| United Kingdom   (no references) |||

Grbić G, Hänggi A, Krnjajić S (2021) Spiders (Araneae) of Subotica Sandland (Serbia): additional arguments in environmental protection. Acta Zoologica Academiae Scientiarum Hungaricae 67: 15-61 pdf

Helsdingen P J van (1982a) Eperigone trilobata revealed as a trans-American species. Bulletin of the British Arachnological Society 5: 393-396 pdf

Hirna A (2017) First record of the alien spider species Mermessus trilobatus (Araneae: Linyphiidae) in Ukraine. Arachnologische Mitteilungen 54: 41-43 pdf

Kostanjšek R, Kuntner M (2015) Araneae Sloveniae: a national spider species checklist. ZooKeys 474: 1-91 pdf

Kreuels M, Staudt A, Christian S (2019) Die Spinnenfauna von Luxemburg – eine Zusammenstellung der Nachweise aus den Jahren 1906-2018 (Arachnida: Araneae). Bulletin de la Société des naturalistes luxembourgeois 121: 203-230 pdf

Løvbrekke H (unpubl.)

Mezőfi L, Markó V (2018) Some rare and remarkable spider species from Hungary (Arachnida: Araneae). Arachnologische Mitteilungen 55: 1-9 pdf

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 pdf

Pantini P, Isaia M (2019) the online catalog of Italian spiders, with addenda on other arachnid orders occurring in Italy (Arachnida: Araneae, Opiliones, Palpigradi, Pseudoscorpionida, Scorpiones, Solifugae). Fragmenta Entomologica 51: 127-152 pdf

Řezáč M, Růžička V, Hula V, Dolanský J, Machač O, Roušar A (2021) Spiders newly observed in Czechia in recent years – overlooked or invasive species? BioInvasions Records 10: 555-566 pdf

Rozwałka R (2010) Mermessus trilobatus (Emerton, 1882) (Araneae: Linyphiidae) – a new spider species to the Polish fauna. Przegląd Zoologiczny 52-54: 163-166 pdf

Šestáková A, Suvák M, Krajčovičová K, Kaňuchová A, Christophoryová J (2017) Arachnids from the greenhouses of the Botanical Garden of the PJ Šafárik University in Košice, Slovakia (Arachnida: Araneae, Opiliones, Palpigradi, Pseudoscorpiones). Arachnologische Mitteilungen 53: 19-28 pdf

WSC (2021) World Spider Catalog. Version 22.5. Natural History Museum Bern, online at (22.09.2021) doi: 10.24436/2 pdf

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