N A T U R K U N D L I C H E S   I N F O R M A T I O N S S Y S T E M

Linyphia triangularis (Clerck, 1758)

(zoological nomenclature: valid name, available)

General information:

Linyphia triangularis (Clerck, 1758)
Synonyms, misspellings, wrong determinations, etc.:
Araneus triangularis Clerck, 1757, ranea montana Linnaeus, 1758; Araneus albini Scopoli, 1763, Aranea pinnata Ström, 1768;

Habit:

     
: Fruška gora (Ravne), 2008.      
Picture from: © Savic Dragisa 2010
Detailed view
     

Description of adults: Examined: 1 . Body length: 5 - 7 mm, 5 - 7 mm. Prosoma flat, yellowish brown with black frame and dark, forked median strip. Slender legs are yellow brown. Female abdomen dorsally with black outlined patern, sometimes less visible. Male abdomen nerow, cilindrical and black (Nentwig et al., 2003)

Distribution:

According to Platnick (2010) this species has Palearctic distribution, and it is introduced in USA. In Fauna Europea stands that it is recorded on whole Europe mainland, but not on the islands (van Helsdingen, 2010).

Biology:

This common species is famous with its sheet – web that could be found on shrubs in woodlands, or on the wood edges, or sometimes on grasslands. Spider hangs upside down below its sheet, waiting for insects. When something is caught, spider grabs and pulls it thru the web and eats below. When mating season comes, both sexes could be found hanging on the same web. This often happens from June till October.

Anatomy:

Male palp : complex structure, with characteristic spiral distal apophysis Epigyne: Epigyne with a large triangular pit, vulva in characteristic shape further details (Nentwig et al. 2010)

Diagnosis:

In its distribution range, L.triangularis could be confused with other Liniphia species, and also with some species Neriene sp. Careful inspection of genital organs should solved the problem.

Importance for humans:

Not dangerous to humans. This species has too weak chelicerae to penetrate the skin.

Worth knowing:

Sources:

Helsdingen, P. van 2010. Araneae. Fauna Europaea version 2.2., http://www.faunaeur.org [online 19 June 2010].
Nentwig W., A. Hänggi, C. Kropf & T. Blick 2003. Spinnen Mitteleuropas/Central European Spiders. An internet identification key. http://www.araneae.unibe.ch Version of 8.12.2003 [online 19 June 2010].
Platnick N. I. 2010. The world spider catalog, version 11.0. American Museum of Natural History, online at http://research.amnh.org/entomology/spiders/catalog/index.html [online 19 June 2010].
Savic´ D. 2010. Nature Photography by Dragiša Savic´ online at http://www.naturefg.com/index.html [online 19 June 2010].

Publication data:

history:
Grbic Gordana: 2010.12.03
Grbic Gordana: 2011.04.03
Grbic Gordana: 2011.04.08
Grbic Gordana: 2011.04.10
Document reviewed by:
not reviewed: 2011.04.10
Document released by:
Grbic Gordana: 2011.04.10

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