Amaurobius obustus L. Koch, 1868
Description
Tibial apophysis dorsally with a slender lateral process, median process long and slender. Epigyne with long lateral parts, reaching end of median part. Prosoma yellow-brown. Sternum yellow-brown. Chelicerae red-brown. Legs yellow-brown, with darker spots. Opisthosoma light grey-yellow, dorsally in the anterior half a black square marking becoming a dark longitudinal stripe posteriorly.
Body length male: 3.0-4.0 mmBody length female: 4.5-5.5 mm
Additional information
Under stones.
Distribution
Figures
Pedipalp
(Pesarini 1991)
Pedipalp, ventral view
(Pesarini 1991)
Pedipalp, ventral view
(Thaler 1990b)
Pedipalp
(Wiehle 1953)
Pedipalp
(Loksa 1969)
Tibial apophysis
(Denis 1963b)
Tibial apophysis
(Denis 1963b)
Tibial apophysis
(Thaler 1990b)
Tibial apophysis
(Thaler 1990b)
Tibial apophysis
(Loksa 1969)
Epigyne
(Denis 1963b)
Epigyne
(Pesarini 1991)
Epigyne
(Thaler 1990b)
Epigyne/vulva, dorsal view
(Thaler 1990b)
Epigyne
(Loksa 1969)
Epigyne
(Danışman et al. 2026a)
Vulva
(Pesarini 1991)
Vulva
(Wiehle 1953)
Vulva
(Loksa 1969)
Vulva, dorsal view
(Danışman et al. 2026a)
Opisthosoma, dorsal view
(Loksa 1969)
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.
References
Blagoev G, Deltshev C, Lazarov S, Naumova M (2018) The spiders (Araneae) of Bulgaria. Version: August 2018. National Museum of Natural History, Bulgarian Academy of Sciences. Online at http://www.nmnhs.com/spiders-bulgaria/ (accessed on 10.9.2018) 
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
Danışman T, Coşar İ, Kunt K B, Yağmur E A (2026a) A new species of Amaurobius (Araneae, Amaurobiidae) from the central Anatolian region of Turkey, with the redescription of Amaurobius ausobskyi Thaler & Knoflach. Journal of Natural History 60: 365-379
Denis J (1963b) Araignées des Dolomites. Atti del Reale Istituto Veneto di Scienze, Lettere ed Arti 121: 253-271
Isaia M, Tolve M, Pantini P (2025) Araneae.it: 2.0: the new updated version of the digital catalog of the Italian spiders and other arachnids (Arachnida: Araneae, Opiliones, Scorpiones, Pseudoscorpiones, Palpigradi, Solifugae). Fragmenta Entomologica 57: 197-204
Kostanjšek R, Kuntner M (2015) Araneae Sloveniae: a national spider species checklist. ZooKeys 474: 1-91
Kropf C, Horak P (1996) Die Spinnen der Steiermark (Arachnida, Araneae). Mitteilungen des Naturwissenschaftlichen Vereines für Steiermark Sonderheft: 1-112
Loksa I (1969) Pokok I-Araneae I. Fauna Hungariae 97: 1-133
Milosevic B (2002) Aranea – Popis vrsta – Checklist. Hrvatsko entomološko društvo – Inventar entomofaune Hrvatske [Aranea – List of species – Checklist. Croatian Entomological Society – Inventory of Croatian entomofauna].
Pesarini C (1991) The Amaurobiidae of Northern Italy (Araneae). Atti della Società Italiana di Scienze Naturali e del Museo Civico di Storia Naturale di Milano 131: 261-276
Thaler K (1990b) Amaurobius ruffoi n.sp., eine weitere Reliktart der Südalpen ? mit Bemerkungen über die Amaurobiidae der Alpen (Arachnida: Aranei). Zoologischer Anzeiger 225: 241-252
Weiss I, Petrișor A (1999) List of the spiders (Arachnida: Araneae) from Romania. Travaux du Muséum National d’Histoire Naturelle “Grigore Antipa” 41: 79-107
Wiehle H (1953) Spinnentiere oder Arachnoidea (Araneae), IX. Orthognatha-Cribellata-Haplogynae, Entelegynae (Pholcidae, Zodariidae, Oxyopidae, Mimetidae, Nesticidae). Die Tierwelt Deutschlands 42: 1-150
WSC (2026) World Spider Catalog. Version 27. Natural History Museum Bern, online at http://wsc.nmbe.ch (13.2.2026) doi: 10.24436/2