Thanatus firmetorum Muster & Thaler, 2003
Description
Male
Bulbus with small tegular apophysis. Embolus massive, tapering towards tip, with dorsal keel. Prosoma dark brown without median and lateral bands, sometimes with yellowish heart-shaped central spot. Sternum brown. Legs brown. Chelicerae yellow-brown. Opisthosoma grey, dorsally with cardiac mark. Spinnerets yellowish grey.
Body length male: 4.55-5.1 mmFemale
Epigyne broad, central division wider than long. Colouration as in males. Legs brown, sometimes with black spots. Femur dorsally with 2 converging yellow stripes.
Body length female: 6.8-7.5 mmAdditional information
endemic species of the Alps, in scree above timberline, 2000-3000 m a.s.l.
Distribution
Phenology
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
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Figures
Pedipalp, ventral view
(Muster & Thaler 2003)
Pedipalp, retrolateral view
(Muster & Thaler 2003)
Tip of embolus
(Muster & Thaler 2003)
Epigyne
(Muster & Thaler 2003)
Vulva, ventral view
(Muster & Thaler 2003)
Distribution List
References
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 
Hänggi A, Stäubli A (2012) Nachträge zum „Katalog der schweizerischen Spinnen“: 4. Neunachweise von 2002 bis 2011. Arachnologische Mitteilungen 44: 59-76
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
Muster C, Thaler K (2000) Das Männchen von Zelotes zellensis Grimm (Araneae: Gnaphosidae). Revue Suisse de Zoologie 107: 579-589
Muster C, Thaler K (2003) The Thanatus striatus species group in the eastern Alps, with description of Thanatus firmetorum sp. n. (Araneae: Philodromidae). Bulletin of the British Arachnological Society 12: 376-382
WSC (2026) World Spider Catalog. Version 27. Natural History Museum Bern, online at http://wsc.nmbe.ch (20.5.2026) doi: 10.24436/2