Bioacoustics of Artema dhofar

Description. Male ( holotype ). MEASUREMENTS. Total length 8.0, carapace width 3.5. Distance PME-PME 210 µm; diameter PME 170 µm; distance PME-ALE 80 µm; distance AME-AME 60 µm, diameter AME 170 µm. Leg 1: 58.6 (15.2 + 1.5 + 16.1 + 22.1 + 3.7), tibia 2: 12.7, tibia 3: 10.0, tibia 4: 12.8; tibia 1 L/d: 51. COLOR (in ethanol). Carapace pale ochre-yellow with brown pattern medially, light brown ocular area; clypeus with brown median band dividing distally, brown rim; sternum pale ochre-yellow, with narrow brown margins and brown triangular mark posteriorly medially; legs ochre-yellow, with distinct brown rings on femora subdistally, in patella area, and on tibiae subdistally; femora 1 and 2 proximally red-brown. Abdomen pale gray, dorsally with indistinct dark marks; ventrally with brown mark in front of gonopore. BODY. Habitus as in Fig. 5 . Ocular area slightly elevated, deep thoracic pit behind ocular area, shallow thoracic furrow in posterior part of carapace; clypeus unmodified except for slightly thickened brown rim. Sternum wider than long (2.2/1.6), unmodified. Gonopore with five epiandrous spigots. CHELICERAE. As in Figs 23–24 , with several sclerotized cone-shaped hairs in distinctive arrangement, with very indistinct pair of low humps proximally laterally, without stridulatory ridges. PALPS. In general very similar to known congeners ( Fig. 28 ); coxa unmodified, trochanter ventrally slightly projecting and strongly sclerotized, femur strongly widened, with retrolateral apophysis proximally pointing towards ventral, patella very short, ventrally closed, i.e. not reduced; tibia retrolateral trichobothrium in very proximal position; procursus with distinct dorsal apophysis and ventral pocket in very proximal position, distally widened, with two light notches in dorsal view ( Fig. 11 ); genital bulb with short membranous embolus accompanied by two processes (large process a and very small process b), process c large with many black pointed tines, without processes d and e ( Figs 12 , 17–18 ). LEGS. Without spines and curved hairs, few vertical hairs; regular mechanoreceptive hairs either thick and variably long (~0.15–1.5) or thin and short (~0.08–0.15); retrolateral trichobothrium of tibia 1 at 8%; prolateral trichobothrium present on all tibiae; tarsus 1 with ~15–20 pseudosegments, barely visible. Male (variation). Lateral humps on chelicerae barely visible in most males. Abdomen pattern variably distinct. Tibia 1 in 5 other males: 12.9–18.0 (mean 15.1). Very small male from Wadi Darbat (tibia 1 missing; tibia 2: 8.0) with process d much smaller than in holotype and with few tines. Female . In general similar to male but with distinct stridulatory ridges on chelicerae, clypeus rim not brown, and anterior femora proximally not or only slightly red-brown. Tibia 1 in 10 females : 8.1–16.0 (mean 13.6). Epigynum anterior plate trapezoidal ( Fig. 32 ), laterally dark brown, medially light and very slightly bulging, posterior margin evenly curved; pair of light brown plates in front of anterior epigynal plate slightly bulging; posterior plate wide, with pair of low lateral humps. Internal genitalia simple, with pair of elongated pore plates in transversal position ( Figs 27 , 37–38 ).