Bioacoustics of Crossopriza ibnsinai

Description Male ( holotype ) MEASUREMENTS. Total length 4.0, carapace width 1.6. Distance PME–PME 55 µm; diameter PME 100 × 130 µm; distance PME–ALE 30 µm; diameter AME 90 µm; distance AME–AME 30 µm. Leg 1: 35.8 (10.2 + 0.7 + 9.6 + 12.9 + 2.4), tibia 2: 6.8, tibia 3: 5.6, tibia 4: 6.4; tibia 1 L/d: 56; femora 1–4 diameters: 0.26, 0.22, 0.21, 0.22. COLOR (in ethanol). Carapace ochre-yellow, anteriorly in median pit with distinct brown mark; sternum brown with dark brown radial marks; legs ochre-yellow, without darker rings, with small black lines on femora only; abdomen gray, with whitish internal marks, with few and indistinct dorsal marks; ventrally with broken dark band, with indistinct parallel longitudinal marks behind gonopore. BODY. Habitus similar to C. sahtan sp. nov. (cf. Fig. 391 ). Ocular area slightly raised. Deep thoracic pit and pair of shallow furrows diverging from pit toward posterior margin. Clypeus unmodified, only rim more sclerotized than in female. Sternum wider than long (1.2/0.7), unmodified. Abdomen slightly elongated, dorso-posteriorly angular to conical. CHELICERAE. As in Figs 543–544 (very similar to C. moqal sp. nov. ), with pair of latero-distal apophyses provided with one large modified cone-shaped hair each; distance between tips of modified hairs: 430 µm; lateral stridulatory ridges clearly visible in dissecting microscope. PALPS. As in Figs 538–540 ; coxa with rounded retrolateral hump; trochanter barely modified; femur distally strongly widened, with rounded ventral protrusion, proximally with prolateral stridulatory pick, with indistinct retrolateral transversal line, without retrolateral proximal process but retrolateral-ventral ridge with some slightly stronger hair-bases; femur-patella joints shifted toward prolateral side; tibiatarsus joints shifted toward retrolateral side; tarsus without macrotrichia; procursus ( Figs 541–542 ) straight, narrowing distally, with low prolateral hump proximally set with numerous long hairs, followed distally by thick ridge, long dorsal hairs mostly straight or weakly curved, procursus tip with long ventral sclerite and two distinctive prolateral sclerites; genital bulb ( Figs 545–547 ) with simple basal sclerite connected to distal (main) sclerite, sperm duct opening not seen; distal sclerite with retrolateral ridge, with distinctive prolateral transversal ridge and small apophysis on ventral semitransparent flap. LEGS. Femur 1 with single row of ~20 ventral spines; without curved hairs; few vertical hairs; retrolateral trichobothrium of tibia 1 at 3%; prolateral trichobothrium absent on tibia 1, present on other leg tibiae; tarsal pseudosegments indistinct and irregular, only at distal tip ~3–4 regular pseudosegments. Male (variation) Tibia 1 in seven males (incl. holotype ): 7.2–9.7 (mean 8.8). Some males with distinct dark and whitish marks on abdomen; dark lines sometimes also on leg tibiae. Female In general similar to male but without spines on legs, apparently without stridulatory files on chelicerae, and with stridulatory organ consisting of pair of weakly sclerotized but distinct processes posteriorly on carapace and pair of small but distinct light brown plates anteriorly on abdomen. Tibia 1 in 21 females : 6.3–10.3 (mean 8.6). Epigynum as in Figs 550–551 , main epigynal plate semicircular, barely protruding, medially posteriorly light, laterally heavily sclerotized with pair of large but narrow pockets (distance 560 µm); internal median structure visible in uncleared specimens; posterior plate light brown, short but wide. Internal genitalia ( Figs 548–549 , 552–554 ) with large elongate pore plates converging anteriorly, dorsal arc slender, ventral arc with median pouch-like modification.