Bioacoustics of Maghreba gharbija

Description Male ( holotype ) MEASUREMENTS. Total length 3.9, carapace width 1.3. Distance PME–PME 120 µm; diameter PME 90 × 120 µm; distance PME–ALE 30 µm; diameter AME 95 µm; distance AME–AME 20 µm. Leg 1: 31.4 (9.4 + 0.5 + 8.6 + 11.0 + 1.9), tibia 2: 5.7, tibia 3: 4.2, tibia 4: 5.0; tibia 1 L/d: 61; femora 1–4 diameters: 0.21, 0.19, 0.18, 0.19. COLOR (in ethanol). Carapace pale grey, medially partly darker (brown V-mark behind ocular area; posterior part of pit darkened); clypeus with pair of black vertical bands; sternum dark ochre, laterally lighter; legs ochre-yellow, without darker rings, with black marks on femora and tibiae (cf. Fig. 281 ), very few also on metatarsi; abdomen gray, with distinct dark pattern around heart area, indistinct whitish marks dorsally and laterally; ventrally with large brown mark in front of gonopore, three indistinct bands behind gonopore, dark brown area at spinnerets. BODY. Habitus as in Figs 257–258 . Ocular area slightly raised. Deep thoracic pit and pair of shallow furrows diverging from pit toward posterior margin. Clypeus unmodified, rim not more sclerotized than in female. Sternum wider than long (1.0/0.6), unmodified. Abdomen distinctly elongated beyond spinnerets. CHELICERAE. As in Figs 268–269 , with pair of frontal lateral apophyses, each with one large modified cone-shaped hair; distance between tips of modified hairs: 410 µm; with very low proximal frontal protrusion; lateral stridulatory ridges not visible in dissecting microscope. PALPS. In general similar to congeners (cf. Figs 203–205 , 224–226 ); coxa with distinct retrolateral-ventral process; trochanter barely modified (low ventral rounded hump); femur not curved towards dorsal, distally widened and with very low rounded ventral protrusion, proximally with prolateral stridulatory pick (modified hair), with very indistinct retrolateral transversal line, with distinct retrolateral-ventral proximal process and distinct dorsal process; femur-patella joints slightly shifted toward prolateral side; tibia relatively long and slender, tibia-tarsus joints shifted toward retrolateral side; tarsus without macrotrichia; procursus ( Figs 265–267 ) relatively short and wide, dorsal hairs barely curved; on prolateral side with proximal ridge followed distally by distinct hump, both hairless; distally with weakly sclerotized ventral flap; procursus tip with strong ventral sclerite, semitransparent process, and small apophysis in-between (arrow in Fig. 267 ); main branch strongly curved towards dorsal, distinctly bifid with thin semitransparent hair-like process; genital bulb ( Figs 270–273 ) basal sclerite with dorsal apophysis; distal (main) sclerite large, with deep retrolateral pocket, strong dorsal process without teeth, ventral part with two distinctively long ventral teeth, sperm duct opening not seen. LEGS. Femur 1 with single row of ~30 ventral spines; without curved hairs; with higher than usual density of short vertical hairs on all tibiae (mainly proximally and prolaterally); retrolateral trichobothrium of tibia 1 at 3.5%; prolateral trichobothrium absent on tibia 1, present on other leg tibiae; tarsal pseudosegments irregular and indistinct except ~3–5 distally. Male (variation) Tibia 1 in 19 males (incl. holotype ): 6.3–8.6 (mean 7.2). Distance between tips of cheliceral apophyses ~390–410 µm. Ventral abdominal pattern slightly variable (three bands behind gonopore variably ‘complete’ or reduced to irregular marks); white abdominal marks variably distinct; abdomen in some males dorsally and laterally with dense pattern of dark (internal) abdominal marks. Retrolateral transversal line on palpal femur sometimes not visible. Female In general similar to male ( Fig. 259 ) but without spines on legs; with stridulatory apparatus between prosoma and abdomen: distinct whitish processes on carapace and very indistinct light brown areas frontally on abdomen; dark clypeus marks usually more distinct than in male, sometimes fused to large mark including anterior part of ocular area; ventral abdominal bands usually distinct. Apparently without cheliceral stridulatory ridges as in male. Tibia 1 in 63 females : 5.0–7.5 (mean 6.2). Epigynum as in Figs 276–280 , main epigynal plate semicircular, variably protruding, with pair of low processes; with pair of indistinct round pockets (distance ~360–390 µm); internal median round structure variably visible in uncleared specimens; posterior plate short and wide, simple; indistinct plate in front of epigynum, not elevated. Internal genitalia ( Figs 274–275 , 282–284 ) with elongated pore plates in transversal position, widening medially; dorsal and ventral arcs medially strongly sclerotized, ventral arc with indistinct ventral rounded pocket.