Bioacoustics of Artema transcaspica

Description Male (unspecified origin; ZIN type vial) MEASUREMENTS. Total body length 5.7, carapace width 3.1. Leg 1: 39.1 (10.1 + 1.3 + 11.5 + 14.0 + 2.2), tibia 2: 9.0, tibia 3: 7.0, tibia 4: 9.3; tibia 1 L/d: 38. Distance PME–PME 150 μm, diameter PME 190 μm, distance PME–ALE 90 μm, distance AME–AME 60 μm, diameter AME 180 μm. COLOR. Carapace light ochre with large brown radial marks, with brown median band that splits at posterior margin of ocular area; ocular area ochre to brown, clypeus with dark brown rim and light brown band below AME enlarged at base of clypeus to triangular shape (as in Fig. 121 ); legs ochre yellow without dark rings on femora, patellae, and tibiae; sternum ochre to light brown with narrow brown margins; abdomen without distinct pattern. BODY. Ocular area slightly elevated; carapace with distinct posterior furrow and distinct median pit close to posterior margin of ocular area; clypeus unmodified; sternum wider than long (2.1/1.7); chelicerae as in Figs 128–130 , with frontal row of ~25 modified (cone-shaped) hairs on each side, situated on elevated process (as in Figs. 146–148 ); cheliceral proximal incline in lateral view without ridge or small process above modified hairs but followed smoothly by first modified hair (as in Fig. 131 ); without stridulatory ridges (unlike some other specimens; see variation below); abdomen globose and high; gonopore with five epiandrous spigots. PALPS. As in Figs 122–124 ; coxa unmodified, trochanter with short ventral projection, femur with distinct retrolateral process proximally, ventral membranous area proximally bordered on both sides by heavily sclerotized ridges, and small dorsal projection proximally; femur-patella hinges close together dorsally; patella very short; procursus with proximal dorsal process, with weakly developed ventral pocket, and distal dorsal notch on prolateral sclerotized margin; bulb with membranous embolus rising from base of process a; process a with subdistal hump; process b narrow, elongated, and pointed; process c triangular; process d is a distinct small ventral projection (as in Figs 125, 127 , 149 ). LEGS.Without spines;with long curved hairs, especially on tibiae and metatarsi; retrolateral trichobothrium on tibia 1 at 10%; prolateral trichobothrium present on all tibiae; pseudosegmentation not visible. Male (variation) Tibia 1 in 13 other males: 10.6–18.1 (mean 13.1); color pattern on abdomen varies from pale without any marks to light brown with lateral stripes; leg color varies from light brown to ochre; ocular area usually light brown; carapace pattern varies from wide brown lateral marks to pale carapace with median band only; two brown bands at base of ocular area sometimes absent; clypeus dark rim and dark band sometimes absent; procursus distal dorsal notch on prolateral margin sometimes slightly elevated and not a distinct indentation ( Fig. 126 ); process c sometimes curved and pointing towards prolateral; lateral stridulatory ridges sometimes absent (as in specimen described above) or very indistinct but sometimes present ( Figs 128, 131 , 153 ); cheliceral proximal incline usually without ridge or small process above modified hairs in lateral view ( Figs 131, 133 ); sometimes present but indistinct ( Fig. 132 ). Epiandrous spigots were counted in five additional males and varied from 4 to 7. Female In general similar to male; tibia 1 in 24 females : 7.0–12.8 (mean 10.8); stridulatory files laterally on chelicerae always present ( Fig. 154 ); epigynal plate square-shaped ( Figs 134–145 , 150 ), consisting of two sclerotized lateral rectangular areas that are gently swollen posteriorly and depressed medially anteriorly, pale median area with long dark median sclerite, usually fused at posterior epigynal margin with lateral sclerotized plates, small median indentation in posterior rim; anterior epigynal projections oval, not prominent in lateral view.