Bioacoustics of Artema atlanta

Description Male ( Myanmar : Rangoon , ZMUC) MEASUREMENTS. Total body length 9.6, carapace width 4.0. Leg 1: 48.4 (16.0 + 1.6 + 16.6 + 22.5 + 2.6), tibia 2: 12.6, tibia 3: 9.5, tibia 4: 13.0; tibia 1 L/d: 42. Distance PME–PME 210 μm, diameter PME 210 μm, distance PME–ALE 110 μm, distance AME–AME 60 μm, diameter AME 180 μm. COLOR. Carapace ochre beige, with light brown median band and small dots laterally; ocular area light brown; clypeus with light brown band fading towards edge, with brown rim (as in Fig. 3 ); legs light ochre, with dark rings on femora subdistally, patellae + tibiae proximally, and tibiae subdistally; sternum light ochre with two small light brown marks posteriorly, with narrow light brown margins; abdomen pale ochre with pale and dark dots forming large marks dorsally and stripes laterally. BODY. Ocular area slightly elevated; carapace with median pit and distinct posterior furrow; clypeus unmodified; sternum wider than long (2.5/2.2); chelicerae as in Figs 22–24 , with frontal row of ~20 modified (cone-shaped; cf. Huber 2000 : figs 12–13) hairs on each side in s-shaped pattern (as in Fig. 24 ); stridulatory ridges absent (as in Fig. 31 ); abdomen globose and high; gonopore with four epiandrous spigots (cf. Huber 2000 : fig. 121); ALS with several cylindrical spigots in addition to widened and pointed spigot (as in Figs 26, 28 ) (cf. Huber 2000 : fig. 169); PMS with two pointed spigots each (as in Fig. 25 ) (cf. Huber 2000 : fig. 195). PALPS. As in Figs 16–18 ; coxa unmodified; trochanter with short ventral projection; femur with short, somewhat pointed retrolateral process and small dorsal projection proximally; ventral membranous area proximally bordered on both sides by sclerotized ridges; femur-patella hinges close together dorsally; patella very short; procursus with proximal dorsal process and weakly developed ventral pocket; with two distal dorsal notches on sclerotized margin (arrows in Fig. 20 ); bulb with membranous embolus arising from base of processes a and b (as in Fig. 27 ; cf. Huber 2000 : fig. 56), process a long, somewhat inflated; process b elongated and pointed, process c (as in Figs 20 , 27 ) with sclerotized ridge projecting prolaterally perpendicular to process b, with small teeth prolaterally on round end of process (as in Fig. 29 ) (cf Huber 2000 : fig. 57), processes d and e low and rounded (as in Figs 19 , 27 ). LEGS. Without spines, with long curved hairs, especially on tibiae and metatarsi; retrolateral trichobothrium on tibia 1 at 9%; prolateral trichobothrium present on all tibiae; pseudosegmentation not visible (cf. Huber 2000 : fig. 99). Comb-hairs on tarsi 4 variant of complex ‘ Belisana -type’ (cf. Huber & Fleckenstein 2008 : figs 17–18). Male (variation) Tibia 1 in 19 other males: 12.0–19.0 (mean 15.4); color pattern on abdomen varies from distinct stripes consisting of dark and pale dots on pale to brown-ochre background, to pale without any pattern; leg color varies from pale to ochre, prolateral ochre mark on patella 1 proximally sometimes absent; ocular area light brown to ochre; lateral dots on carapace vary from round radiating pattern to small indistinct marks; cheliceral modified hairs vary in numbers (~17–20), sometimes sclerotized ridge very dark and pattern of modified hairs hard to distinguish, one male with small process medial of sclerotized ridge (from Khartoum , Sudan ; MRAC 120766 ); brown marks posteriorly on sternum variable; one male with procursus notches almost fused to one large notch without sclerotized line between them (from Shantou, China ; MNHN AR 10166). No variation observed in numbers of epiandrous spigots. Female In general similar to male; tibia 1 in 20 females : 9.2–17.2 (mean 13.2); stridulatory files laterally on chelicerae present ( Fig. 30 ); epigynal plate trapezoidal (posteriorly wider), posterior margin with deep median indentation ( Figs 15 , 33 ); epigynal plate consisting of two sclerotized lateral areas that appear swollen posteriorly, usually light brown, sometimes very pale at lateral posterior edge, with light brown to pale median area, and dark sclerite anteriorly (variably large and variably distinct), posterior rim sometimes slightly sclerotized; pair of projections anterior to epigynum (AEP) ovoid, sometimes with variable light brown marks anteriorly.