Troglohyphantes bonzanoi Brignoli, 1979

Isaia, Marco & Pantini, Paolo, 2010, New data on the spider genus Troglohyphantes (Araneae, Linyphiidae) in the Italian Alps, with the description of a new species and a new synonymy, Zootaxa 2690, pp. 1-18 : 5-7

Troglohyphantes bonzanoi Brignoli, 1979

Figures 10–14

Troglohyphantes bonzanoi Brignoli, 1979: 31 , figures 70–74.

Material examined. Italy, Liguria, Province of Imperia: Pieve di Teco (IM), Sgarbu du Ventu cave (619 Li/ IM) (locus typicus), 18/10/2008, 1 ɗ, 3 Ψ, E. Lana legit.

Description. Female: prosoma 1.09 long, 1.00 wide, uniformly light yellowish. Carapace rounded, dorsally with a narrow ridge, marked with a longitudinal streak. Cephalic region very slightly elevated, with few small black bristles forming the eye region and continuing backwards in three longitudinal rows converging at the thoracic furrow. Clypeus slightly indented under the eyes, then convex. Eyes very reduced, without pigment. AME smallest, PLE slightly larger than PME and ALE slightly larger than PME. Eye diameters AME 0.020, PME 0.030, ALE 0.038, PLE 0.046. PLE-PME distance = 0.092, ALE-AME distance = 0.092, PME-PME distance = 0.084, AME-AME distance = 0.015, ALE and PLE contiguous. Sternum heartshaped, yellowish with flimsy darkened anterior edges and interspersed bristles. Chelicerae light brownish furnished laterally with stridulatory ridges. Anterior margin of the chelicerae with three contiguous median teeth and a distal one; posterior margin with six small median teeth ( Figure 13 ). Legs medium-long (femur twice as long as the prosoma), uniformly light yellowish. Leg I: femur 2.26, patella 0.43, tibia 2.33, metatarsus 2.03, tarsus1.20 TLL 8.25; leg II: femur 2.16, patella 0.36, tibia 2.16, metatarsus 1.96, tarsus 1.00, TLL 7.64; leg III: femur 1.86, patella 0.36, tibia 1.63, metatarsus 1.50, tarsus 0.90, TLL 7.15; leg IV: femur 2.53, patella 0.33, tibia 2.13, metatarsus 1.86, tarsus 1.13, TLL 7.98. Palp: femur 0.60, patella 0.13, tibia 0.33, tarsus 0.73, total palp length 1.79. Abdomen 1.73 long, 1.09 wide, whitish/grey with dark hair. Epigynum strongly protruding. Scape short, wider than long, U-shaped with two lateral incisions, arched in lateral view ( Figures 11–13 ). Internal genitalia as outlined in Figure 14 . Spination: femur I with two dorsal, one prolateral spines; femur II–III with one dorsal spine, femur IV with no dorsal spines. Patella I–IV with one dorsal spine. Tibia I with two dorsal, three prolateral, three retrolateral and two ventral spines. Tibia II with two dorsal, no prolateral, two retrolateral and two ventral spines; tibia III with two dorsal, no lateral and no ventral spines; tibia IV with two dorsal, one prolateral and one retrolateral spines. Metatarsus I–IV with one dorsal spine. Palp with one dorsal spine on patella, one dorsal and two prolateral on tibia and four dorsal, three prolateral and two ventral spines on tarsus. Position of TmI: 0.2. Trichobothrium on Mt IV absent.

Distribution. The species is only known from the type locality, namely the Sgarbu du Ventu cave (619 LiIM) of Pieve di Teco (Liguria, province of Imperia).

Note. In the original description of the male, Brignoli (1979) considered this species to be close to T. vignai and T. nigraerosae . According to the shape of lamella characteristica, the shape of the epigynum and the and the remarkable reduction of the eyes the species is most similar to the species in Pesarini’s (2001) orphaeus complex.

Figures

FIGURE 10. Troglohyphantes bonzanoi Brignoli, 1979. Male from type locality (18 / 10 / 2008, E. Lana legit). Retrolateral view of right male pedipalp. (E = Embolus; LC = Lamella characteristica; PC = Paracymbium; SA = Suprategular apophysis; Te = Tip of the embolus). Scale: 0.2 mm. Illustration by Elena Pelizzoli.

FIGURES 11 – 14. Troglohyphantes bonzanoi Brignoli, 1979. Female from type locality (18 / 10 / 2008, E. Lana legit). 11. Epigyne, ventral view; 12. Epigyne, lateral view. 13. Chelicerae, posterior view. 14. Epigyne and internal genitalia, lateral view. Scales: 11 – 12 = 0.2 mm; 13 – 14 = 0.5 mm. Illustration by Elena Pelizzoli.