Theridiidae  Sundevall, 1833 / Achaeridion  Wunderlich, 2008   1 species

Achaeridion conigerum  (Simon, 1914)

Description
Male

Palp: embolus short, straight. Prosoma 0.59-0.7 mm long. Characters mainly as in female. Opisthosoma: epigastric area bulging.

Body length male: 1.2-1.5 mm
Female

Epigyne not sclerotized, indistinct. Prosoma brown, margined dark. Prosoma 0.55-0.74 mm long. Sternum black, or brown with black edges. Clypeus concave. Chelicerae: promargin with one tooth. Legs light brownish, with dark annulations, metatarsus I twice as long as tarsus I, metatarsus III with a trichobothrium. Opisthosoma dark, irregularly marbled with light yellow, ventrally black with 3 white spots, posteriorly with tubercle.

Body length female: 1.4-1.6 mm
Additional information

Under stones in heathland and forest, in cone-shaped retreat consisting of sand particles and prey remnants, attached freely under stones, single threads extend from the margin.

Frequency: rarely caught, probably often ignored

Distribution
  Presence
  No data
Global distribution (WSC 2024): Europe, Turkey
Phenology
JanFebMarAprMayJunJulAugSepOctNovDec
 male  female
Female with egg sac from May to August.
Figures
Distribution List

"No references" does not mean that the species does not occur in this country, but that we have not yet inserted the reference for it. We are working on it.

Austria   (no references) ||| Belarus   (Zhukovets, 2017) ||| Czechia   (Růžička & Řezáč, 2022a) ||| France   (no references) ||| Germany   (no references) ||| Norway   (Aakra et al., 2016) ||| Poland   (Rozwałka & Stanska, 2008) ||| Spain   (Breitling, 2020) ||| Sweden   (Kronestedt, 2001) ||| Turkey (Asia)   (no references) |||
References

Aakra K, Morka G H, Antonson A, Farlund M, Wrånes R E, Frølandshagen R, Løvbrekke H, Furuseth P, Fjellberg A, Lemke M, Pfliegler W P, Andersen S, Olsen K M, Aadland B, Berggren K (2016) Spiders new to Norway (Arachnida, Araneae) with ecological, taxonomical and faunistic comments. Norwegian Journal of Entomology 63: 6-43 pdf

Breitling R (2020) South European spiders from the Duffey collection in the Manchester Museum (Arachnida: Araneae). Arachnology 18: 333-362 pdf

Farlund M (2019) Norwegian Spiders - Norske edderkopper. Siste oppdatering for funn av nye arter 10. oktober, 2019. Online at http://crocea.wordpress.com/norsk-artsliste/ pdf

Heimer S (1980) Eine bemerkenswerte Kugelspinne aus dem Harz (Arachnida, Araneae, Theridiidae). Faunistische Abhandlungen, Staatliches Museum für Tierkunde Dresden 7: 179-181 pdf

Knoflach B (1993a) Theridion conigerum Simon - rediscovered in Austria (Araneae: Theridiidae). Bulletin of the British Arachnological Society 9: 205-208 pdf

Kronestedt T (2001) Checklist of Spiders (Araneae) in Sweden [Preliminary version February 2001] pdf

Kunt K B, Kaya R S, Özkütük R S, Danişman T, Yağmur E A, Elverici M (2012) Additional notes on the spider fauna of Turkey (Araneae). Turkish Journal of Zoology 36: 637-651 pdf

Kupryjanowicz J (1997a) Spiders of the Biebrza National Parc - species new and rare to Poland. Proceedings of the 16th European Colloquium of Arachnology: 183-194 pdf

Le Peru B (2011) The spiders of Europe, a synthesis of data: Volume 1 Atypidae to Theridiidae. Mémoires de la Société Linnéenne de Lyon 2: 1-522 pdf

Løvbrekke H (unpubl.)

Rozwałka R, Stanska M (2008) Check-list of spiders (Araneae) of Poland. 1. December 2008. online at http://www.arachnologia.edu.pl/en/species/8-spiders-of-poland.html pdf

Růžička V, Řezáč M (2022a) Seznam pavouků České republiky. List of spiders of the Czech Republic. Online at https://www.arachnology.cz/seznam-pavouku-cr-26.html and https://www.arachnology.cz/en/seznam-pavouku-cr-26.html pdf

WSC (2024) World Spider Catalog. Version 25.0. Natural History Museum Bern, online at http://wsc.nmbe.ch (22.01.2024) doi: 10.24436/2 pdf

Zhukovets E M (2017) [Spiders (Arachnida, Aranei) of the Belovezhskaya Pushcha]. Riftur Print, Minsk, 272 pp. [N.B.: presumably publ. in Jan. 2019] pdf

Updates
08-03-2022 Distribution insert Detail
28-06-2020 Image insert
24-03-2020 Distribution insert Detail
14-01-2017 Image insert
26-02-2014 Distribution update Detail
05-07-2013 Distribution update Detail