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

Uloborus walckenaerius Latreille, 1806

(zoological nomenclature: valid name, available)

General information:

Uloborus walckenaerius Latreille, 1806
Synonyms, misspellings, wrong determinations, etc.:
Veleda lineata Blackwall, 1859, Veleda pallens Blackwall, 1862

Habit:

     
: Fruška gora (Koševac), 2009.      
Picture from: © Savic Dragisa 2010
Detailed view
     

Description of adults: Examined: 1 3 . Body length: about 6 mm, about 10 mm (personal observation). There are some difference in cororization and body size between sexes. Males are smaler and darker. Prosoma densely covered with white hair. Opisthosoma whitish-gray with fluffy hair, without dorsal hump, legs dark gray-brown to reddish brown with indistinct white girdling. Legs I and II are especially long. Anterior and posterior lateral eyes widely separated. Calamistrum and cribelum are present. (Nentwig at all, 2003)

Distribution:

According to Platnick (2010) this species has Palearctic distribution. In Fauna Europea stands that it is not recorded in some countries in north region such as Ireland, Sweden, Norway and Finland (van Helsdingen, 2010).

Biology:

This interesting species is very special in spiders’ world. It doesn’t have poisonous glands, so the prey wrapped in silk is eaten alive. It makes a small horizontal orb web on low plants, but usually could be found to wait hanged upside down on the nearest branch. The grey and pale brown colour of the body and long stretch first two pairs of legs gives species excellent camouphlage. Adults could be found in nature in summer.

Anatomy:

Male palp : no description, only drawings Epigyne: two fingerlike lumps covered with hair further details (Nentwig et al. 2010)

Diagnosis:

In Europe 5 species from the genus Uloborus are present, but 3 of them are endemic. Only U. plumipes in distribution range overlap with this species, but has completely different appearance.

Importance for humans:

No data, but without poisonous glands could not harm humans.

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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