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 mmFemale
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 mmAdditional 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.
Distribution
Phenology
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
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Figures
Pedipalp
(Heimer 1980)
Pedipalp
(Knoflach 1993a)
Pedipalp
(Knoflach 1993a)
Pedipalp, expanded, ventral view
(Heimer 1980)
Pedipalp, retrolateral view
(Løvbrekke unpubl.)
Habitus, lateral view
(Knoflach 1993a)
Habitus, lateral view
(Løvbrekke unpubl.)
Epigyne
(Knoflach 1993a)
Vulva
(Knoflach 1993a)
Vulva, dorsal view
(Aakra et al. 2016)
Habitus, lateral view
(Aakra et al. 2016)
Habitus
(Heimer 1980)
Habitus
(Knoflach 1993a)
Habitus, lateral view
(Kupryjanowicz 1997a)
Distribution List
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 
Blick T, Finch O-D, Harms K H, Kiechle J, Kielhorn K-H , Kreuels M, Malten A, Martin D, Muster C, Nährig D, Platen R, Rödel I, Scheidler M, Staudt A, Stumpf H, Tolke D (2016) Rote Liste und Gesamtartenliste der Spinnen (Arachnida: Araneae) Deutschlands. 3. Fassung, Stand April 2008, einzelne Änderungen und Nachträge bis August 2015. Naturschutz und Biologische Vielfalt 70/4: 383-510
Breitling R (2020) South European spiders from the Duffey collection in the Manchester Museum (Arachnida: Araneae). Arachnology 18: 333-362
Danışman T, Kunt K B, Özkütük R S, Coşar İ (2025a) The checklist of the spiders of Turkey. Version 2025 [last updated 01 December 2025], online at http://www.spidersofturkey.info
Heimer S (1980) Eine bemerkenswerte Kugelspinne aus dem Harz (Arachnida, Araneae, Theridiidae). Faunistische Abhandlungen, Staatliches Museum für Tierkunde Dresden 7: 179-181
Knoflach B (1993a) Theridion conigerum Simon - rediscovered in Austria (Araneae: Theridiidae). Bulletin of the British Arachnological Society 9: 205-208
Knoflach B, Thaler K (1998) Kugelspinnen und verwandte Familien von Österreich: ökofaunistische Übersicht (Araneae: Theridiidae, Anapidae, Mysmenidae, Nesticidae). Stapfia 667-712
Kronestedt T (2001) Checklist of Spiders (Araneae) in Sweden [Preliminary version February 2001]
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
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
Le Peru B (2007) Catalogue et répartition des araignées de France. Revue Arachnologique 16: 1-468
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
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
WSC (2026) World Spider Catalog. Version 27. Natural History Museum Bern, online at http://wsc.nmbe.ch (20.5.2026) doi: 10.24436/2
Zhukovets E M (2017) [Spiders (Arachnida, Aranei) of the Belovezhskaya Pushcha]. Riftur Print, Minsk, 272 pp. [N.B.: presumably publ. in Jan. 2019]