Bioacoustics of Savarna kaeo

Description Male ( holotype ) MEASUREMENTS. Total body length 2.7, carapace width 1.1. Leg 1: 24.1 (6.2 + 0.4 + 5.9 + 9.4 + 2.2), tibia 2: 3.7, tibia 3: 2.6, tibia 4: 3.6; tibia 1 L/d: 56. Distance PME-PME 200 µm, diameter PME 95 µm, distance PME-ALE 35 µm; AME absent. COLOR. Carapace pale ochre, with wide dark lateral margins; ocular area and clypeus also dark brown; sternum black; legs light ochre, with darker rings on femora (subdistally) and tibiae (proximally); abdomen gray, with dark subcuticular marks lying above deeper white marks, with distinct ventral pattern consisting of three interconnected black marks. BODY. Habitus as in Fig. 2 ; ocular area elevated, each triad on short hump directed toward lateral; carapace with deep median furrow ( Fig. 19 ); clypeus with pair of rounded processes at rim provided with strong and long hairs ( Figs 19–20 ); sternum wider than long (0.72/0.48), unmodiFed. Chelicerae as in Fig. 16 , with pair of lateral processes directed slightly toward posterior; without stridulatory ridges. ALS as in female ( cf. Fig. 24 ). Gonopore without epiandrous spigots ( Fig. 26 ). PALPS. As in Figs 14–15 ; coxa unmodiFed; trochanter with small dorsal process and distinctive ventral apophysis proximally attached to femur ( Fig. 21 ); ventral side of femur apparently largely membranous; tarsal organ capsulate ( Fig. 25 ); procursus distally complex ( Figs 22–23 ), with distinctive membranous and sclerotized elements; bulb with large proximal sclerite, with single complex process apparently containing sperm duct ( Figs 14 , 22 ). LEGS. With short spines in single ventral rows on femora 1–3 and tibiae 1–2 (femur 1: ~40 on distal half; femur 2: ~20 on distal half; femur 3: ~10 distally; tibia 1: ~80 over entire length; tibia 2: ~50 over entire length); with vertical hairs in higher than usual density on all tibiae (especially tibiae 2–4); without curved hairs; retrolateral trichobothrium on tibia 1 at 8%; prolateral trichobothrium absent on tibia 1, present on other tibiae; tarsal pseudosegments indistinct, only about 10 visible distally on tarsus 1. Male (variation) Numbers of spines on legs variable, femur 3 spines absent in most males; small males with fewer and thinner spines. Tibia 1 in 16 other males: 4.9–6.4 (mean 5.6). Female In general similar to male ( Fig. 3 ); eye triads closer together (PME-PME distance: 140 µm); clypeus unmodiFed; legs without spines and with usual low number of vertical hairs. Tibia 1 in 24 females : 4.0–5.5 (mean 4.8). Epigynum slightly protruding toward posterior ( Fig. 29 ), with wide transversal sclerotized plate with rounded humps laterally ( Figs 17 , 27–28 ), plate more or less divided medially ( Figs 28 , 36 ; variable even within localities); internal genitalia as in Figs 18 and 37 . ALS with only two spigots each ( Fig. 24 ). Natural history Spiders were found both inside caves (twilight zone) and outside caves if large rocks provided sufFcient shade (Tham Kaeo ; Tham Phraya Nakhon). When disturbed, the spiders Frst vibrated, and then dropped to the ground, remaining motionless.