Agelenidae  C. L. Koch, 1837 / Aterigena  Bolzern, Hänggi & Burckhardt, 2010   4 species

Aterigena ligurica  (Simon, 1916)

Description
Male

RTA with a large dorsal branch, distally pointed and strongly sclerotized; lateral branch forming sclerotized finger-shaped appendix; ventrally bearing a weakly developed rounded ridge. Embolus originating (free apex) at 7 o’clock position; length (only the free apex) slightly more than twice cymbium width; distal tip between 3 and 4 o’clock position. Conductor lamella-like, distally elongated (parallel to cymbium), arcuated and laterally folded along the whole length; as long as alveolus, distally reaching beyond alveolus margin; terminal end forming sclerotized peak, pointing ventrally (in lateral view). Connection of conductor and tegulum membranous. Median apophysis consisting of membranous base and thin and broad sclerotized distal plate, pocket-like; originating at 5 o’clock position; protruding ventrally; basis as wide as median apophysis length. Tegular apophysis absent. Prosoma length: 6.82 mm.

Female

Epigynal plate strongly sclerotized, trapezoidal, with distinct atrium; atrium posteriorly reaching epigastral furrow. Ground plate of atrium strongly sclerotized, anterior distinctly connected with epigynal plate, undivided reversed trapezoidal shaped. Lateral margins of atrium converging posteriad, strongly elongated vertices present. Receptacula visible through plate. Copulatory openings well-visible as holes, located at anterior border of atrium. Copulatory duct short and straight. Receptacula large, oval to globular, almost touching each other; fertilization ducts long and strongly convoluted. Prosoma length: 5.63–6.58 mm.

Additional information

Eyes: In dorsal view both eyerows straight or slightly recurved; in frontal view PER procurved and AER straight or slightly procurved. Diameters: PME: 0.21–0.23; PLE: 0.20–0.24; AME: 0.18–0.21; ALE: 0.21–0.24. Distances: PME–PME less or equal diameter of PME; PME–AME less than diameter of PME; PME–PLE about diameter of PME; PME–ALE about diameter of PME or slightly more; AME–AME 0.5–1.0 times diameter of AME; AME–ALE about half diameter of AME. Clypeus height (measured under AME) less than or equal to 3 times diameter of AME; (measured under ALE) about twice diameter of ALE or slightly more. Coloration: Carapace with narrow, continuous dark margin; two longitudinal symmetrical darkened bands present on carapace, interrupted and sometimes reduced to triangular dots. Sternum with brighter median band, sometimes very weak. Opisthosoma with red-brown median band, anterolaterally with two bright bands, continuing posteriorly as dots. Legs weakly annulated best expressed ventrally on femora. Additional somatic characters: Distal margin of labium weakly concave. Plumose hairs present on carapace, legs and opisthosoma. Four promarginal teeth, the second one from proximal largest; 4–5 retromarginal teeth, most proximal tooth largest. Trochanter III and IV notched. Tarsi I and II with 7–8 dorsal trichobothria and 8–9 on tarsi III and IV. Colulus forming rectangular plate, distal margin straight, only partly colored. PLS longer than all others with distal segment as long as or slightly longer than basal segment, both darkened. PMS as long as ALS. ALS slightly darkened.

Distribution
  Presence
  No data
Global distribution (WSC 2018): France, Italy
Figures
References

Bolzern A, Hänggi A, Burckhardt D (2010) Aterigena, a new genus of funnel-web spider, shedding some light on the Tegenaria-Malthonica problem (Araneae: Agelenidae) J Arachnol 38: 162–182

Dresco E, Célérier M-L (1976a) Étude des tégénaires. Tegenaria ligurica Simon 1916 (Araneae, Agelenidae). Annls Spéléol 31: 219-221

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

Maurer R, Thaler K (1988) Über bemerkenswerte Spinnen des Parc National du Mercantour (F) und seiner Umgebung (Arachnida: Araneae). Rev Suisse Zool 95: 329-352

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

Simon E (1937) Les arachnides de France 6 (5). Paris (Roret): 979-1298

World Spider Catalog (2018) World Spider Catalog. Natural History Museum Bern, online at http://wsc.nmbe.ch, version 19.0, accessed on 14.01.2018. doi: 10.24436/2