Eresidae  C. L. Koch, 1845 / Eresus  Walckenaer, 1805   15 species

Eresus kollari  Rossi, 1846

Description

Conductor distally short and blunt, distal furrow shallow. Vulva anteriorly broad, entrance ducts strongly lobed. Body jumping-spider-like, males contrastingly coloured. Prosoma black, female: black, head region mostly provided with yellow hairs. Male: black. Legs short and robust. Female: black, provided with bluish light grey hairs. Male: black or reddish, annulated with white, III and IV with red hairs. Opisthosoma female: appears velvety black due to shiny hairs. Male: dorsally shiny red with 2 pairs of large and one pair of small, black spots (often margined white), laterally and ventrally black.

Body length male: 8-11 mm
Body length female: 9-16 mm
Additional information

in colonies in burrows of up to 10 cm depth (1 cm diameter), covered by small shield- or funnel-like web. Female carries lens-shaped cocoon (8-10 mm diameter, approximately 65-100 eggs) to sunny places during the day. Hatching juveniles stay in the female's burrow and feed on her after her death.

This species can bite humans. A bite into a finger caused pain, spreading to the axilla, with fever-like symptoms and an increased heart rate. After one hour the patient had partially recovered and after 2 hours the symptoms had alleviated, but a strong headache lasted for one day and the finger remained sensitive for several days.

Frequency: Rare

Distribution
  Presence
  No data
Global distribution (WSC 2017): Europe to Central Asia
Phenology
JanFebMarAprMayJunJulAugSepOctNovDec
 male  female
adult males July-October, females adult after 3 years
Figures
References

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Braendegaard J (1966) Edderkopper: Eller Spindlere I Danmarks Fauna 72: 1-224

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Pantini P, Isaia M (2017) Checklist of the Italian spiders (version May 2017). online at http://www.museoscienzebergamo.it/web/index.php?option=com_content&view=category&layout=blog&id=96&Itemid=94

Ratschker U M, Bellmann H (1995) Zur Bestimmung der mitteleuropäischen Arten der Gattung Eresus Walckenaer 1805 (Arachnida: Araneae: Eresidae). Beitr Araneol 4: 217-218

Rezác M, Pekár S, Johannesen J (2008a) Taxonomic review and phylogenetic analysis of central European Eresus species (Araneae: Eresidae). Zool Scripta 37: 263-287

Roberts M J (1998) Spinnengids. Tirion Natuur Baarn, Netherlands

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

Wiehle H (1953) Spinnentiere oder Arachnoidea (Araneae), IX. Orthognatha-Cribellata-Haplogynae, Entelegynae (Pholcidae, Zodariidae, Oxyopidae, Mimetidae, Nesticidae). Tierwelt Deutschlands 42

World Spider Catalog (2017) World Spider Catalog, version 18.0. Natural History Museum Bern, online at http://wsc.nmbe.ch, accessed on 23.01.2017

Updates
14-10-2015 Image insert
01-12-2013 Distribution update Old value
26-11-2013 Datasheet update Old value
16-10-2013 Distribution update Old value
09-04-2013 Distribution update Old value