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

Mermessus trilobatus  (Emerton, 1882)

Description

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
Distribution
  Presence
  No data
Global distribution (WSC 2020): North America. Introduced to Azores, Europe
Phenology
JanFebMarAprMayJunJulAugSepOctNovDec
 male  female
Figures
Distribution List
Austria   (no references) ||| Belgium   (no references) ||| Croatia   (no references) ||| Czechia   (no references) ||| France   (no references) ||| Germany   (no references) ||| Hungary   (no references) ||| Italy   (Pantini & Isaia, 2019) ||| Luxembourg   (Kreuels et al., 2019) ||| Netherlands   (no references) ||| Poland   (no references) ||| Slovakia   (no references) ||| Slovenia   (Kostanjšek & Kuntner, 2015) ||| Switzerland   (no references) ||| Ukraine   (no references) ||| United Kingdom   (no references) |||
References

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) Araneae.it: the online catalog of Italian spiders, with addenda on other arachnid orders occurring in Italy (Arachnida: Araneae, Opiliones, Palpigradi, Pseudoscorpionida, Scorpiones, Solifugae). http://araneae.it. Fragmenta Entomologica 51: 127-152 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

World Spider Catalog (2020) World Spider Catalog. Version 21.0. Natural History Museum Bern, online at http://wsc.nmbe.ch (20.03.2020) doi: 10.24436/2 pdf

Updates
12-05-2020 Distribution insert Detail
04-04-2019 Datasheet update Detail
07-12-2018 Datasheet update Detail
22-05-2018 Image insert
16-08-2017 Distribution update Detail
03-02-2017 Image insert
09-05-2016 Image insert
13-05-2014 Distribution update Detail