Bioacoustics of Troglohyphantes lanai

Description. Male holotype : prosoma 1.38 long, 1.23 wide, light-yellowish. Anterior part of prosoma faintly darker. Thoracic region rounded, dorsally with a narrow ridge, marked with a dark longitudinal streak. Cephalic region slightly elevated, interspersed with black bristles starting from the eye region and continuing in three longitudinal rows that converge to the anterior end of fovea. Clypeus slightly indented under the eyes, then convex. Eyes reduced, without pigment ( Figure 5 ). AME smallest. PLE very slightly bigger than PME, ALE slightly larger than PLE. ALE and PLE nearly contiguous (distance = 0.014). PLE-PME distance = 0.110, ALE-AME distance = 0.138, PME-PME distance = 0.128, AME-AME distance = 0.013. Eye diameters AME 0.027, PME 0.038, ALE 0.046, PLE 0.050. Sternum heart-shaped, yellowish with flimsy darkened anterior edges. Chelicerae light brownish, with lateral stridulatory ridges and armed with three anterior teeth. Posterior margin with a small lamina and a small proximal tooth ( Figure 7 ). Legs medium-long (femur twice as long as the prosoma), uniformly light yellowish. Leg I: femur 2.87, patella 0.43, tibia 3.13, metatarsus 2.70, tarsus1.56 TLL 10.69; leg II: Fe 2.60, patella 0.50, tibia 3.00, metatarsus 2.66, tarsus 1.33, TLL 10.09; leg III: femur 2.33, patella 0.43, tibia 2.33, metatarsus 2.16, tarsus 1.00, TLL 11.01; leg IV: femur 3.00, patella 0.43, tibia 2.97, metatarsus 2.66, tarsus 1.33, TLL 10.03. Abdomen 1.93 long, 1.10 wide; whitish-grey with dark setae. Palp ( Figure 1 ): femur 0.83, patella 0.36. Cymbium faintly convex, subtriangular when seen from above, ending proximally in a single tooth-like apophysis, rounded at the proximal border ( Figure 4 ). Posterior part of paracymbium sub-triangular, apical part dimly longer than the latter and distally bent nearly at a right angle, gradually narrowed anteriorly. Lamella characteristica branched in two. The upper branch ending in a small and narrow lobe, twisted and rounded at top. Lower branch of the lamella directed anteriorly, nearly orthogonal to the upper branch and enlarged at the end in the shape of a right-angled trapezium. Suprategular apophysis directed upwards, with a sharp end. Tip of the embolus spiky, tubular ( Figure 6 ). Spination: femur I with one dorsal, two prolateral spines; femur II with one dorsal spine and one small prolateral spine. Femur III and IV with one dorsal spine. Patella I–IV with one dorsal spine. Tibia I and II with two dorsal, four prolateral (apical included), three retrolateral (apical included) spines; tibia III and IV with one dorsal, three prolateral (apical included) and two retrolateral spines (apical included). Metatarsus I– IV with one dorsal and one prolateral spine. Metatarsus ventrally with several small spines. Position of TmI: 0.2. Trichobothrium on Mt IV absent. Female ( paratype from same locality as holotype , 9/05/1992 , E. Lana legit): prosoma 1.53 long, 1.33 wide, convex, smooth and slightly darker than male. Cephalic region slightly elevated. Carapace, ocular area, clypeus, and sternum similar to male in all features except cephalic bristles, being smaller. Anterior margin of the chelicerae armed with three teeth, posterior margin distally with a small lamina and three small teeth ( Fig. 8 ). PLE-PME distance = 0.100, ALE-AME distance = 0.110, PME-PME distance = 0.110, AME-AME distance = 0.020, ALE-PLE distance = 0.015. Eye diameters: AME 0.030, PME 0.046, ALE 0.061, PLE 0.046. Abdomen 2.00 long, 1.33 wide, whitish/grey with dark hairs.. Leg I: femur 2.90, patella 0.56, tibia 3.13, metatarsus 2.61, tarsus 1.50, TLL 10.07; leg II: Fe 3.23, patella 0.56, tibia 3.31, metatarsus 2.76, tarsus 1.56, TLL 10.82; leg III: femur 2.63, patella 0.50, tibia 2.42, metatarsus 2.16, tarsus 1.00, TLL 8.71; leg IV: femur 3.13, patella 0.55, tibia 3.13, metatarsus 2.66, tarsus 1.37, TLL 10.84. Female palp: femur 0.56, patella 0.13, tibia 0.30, tarsus 0.83, total palp length 1.82. Spination: Pedipalpal patella armed with a dorsal spine, tibia with three long spines (one dorsal and two prolateral) and metatarsus armed with nine smaller spines of which two dorsal proximal, three prolateral, 2 retrolateral and two ventral apical. Femur I with two dorsal, two prolateral spines; femur II with one dorsal spine and two prolateral spine. Femur III and IV with one dorsal spine. Patella I–IV with one dorsal spine. Tibia I and II with two dorsal, four prolateral (apical included) and three retrolateral (apical included) spines; tibia III and IV with one dorsal, three prolateral (apical included) and two retrolateral spines (apical included). Metatarsus I–IV with one dorsal and one prolateral spine. Position of TmI: 0.2. Trichobothrium on Mt IV absent. Epigynum strongly protruding. Scape short, wider than long, U-shaped with two lateral incisions, arched in lateral view. Internal genitalia as in Figure 9 .