Bioacoustics of Agyneta flax

Description: Male : Total length 1.83; carapace length 0.85, width 0.59. CEPHALOTHORAX: Carapace dark orange, shiny, finely reticulate; margin, radiating lines strongly suffused with dark gray; trident mark often present. Sternum strongly suffused with dark gray. Clypeus height 2. Chelicerae orange, excavated; ~ 6 seta-tipped tubercles; promargin three teeth, retromargin three tiny denticles; both margins with rounded projection at base of fang. Cheliceral stridulatory organ ~ 41 striae, well spaced gradually getting closer basally. ABDOMEN: Elongated, coloration variable, sometimes uniformly dark gray or with median pale gray band flanked by dark blackish bands ( Fig. 269 ). LEGS: Yellow, femora with retrolateral and prolateral suffused with gray, femora I-II distal half dark suffused with gray; total leg I length: 2.67; leg III total length: 2.25; Tm I: 0.25, Tm IV: absent. GENITALIA: Palpal retrolateral tibial apophysis large and rugose; dorsal tibial apophysis absent; two retrolateral, one dorsal trichobothria ( Fig. 265 ). Cymbium triangular; glabrous depression present ( Fig. 265 ); dorsal cymbial turbercle small, pointed and smooth; ventral cymbial tubercle elongated, rounded and smooth; prolateral notch seemingly absent ( Fig. 266 ). Paracymbium apical pocket short, anterior pocket short and curved, posterior pocket spine-like ( Fig. 265 ). Embolus tip rounded; Fickert’s gland basal, globulous; ventral lamella thin, transparent; thumb short, reaching below the embolus proper ( Fig. 267 ). Embolus proper set apically, of equal part ( Fig. 267 ). Anterior terminal apophysis long with short protrusions, with a small process basally and a large well sclerotized, rounded process retrolaterally; posterior terminal apophysis with rounded, rugose tip; lamella characteristica long and wide, ending in one large point and a large, folded transparent extension ( Fig. 268 ). Female : Total length 1.58; carapace length 0.67, width 0.51. CEPHALOTHORAX: Coloration as in male. Chelicerae promargin four teeth, retromargin four denticles. Cheliceral stridulatory organ ~38 striae, narrowly spaced. ABDOMEN: Oval, coloration variable, patterned as in female of A. picta ( Fig. 260 ) or light to dark gray with chevrons pattern ( Fig. 270 ). LEGS: Coloration as male; palpal tarsal claw absent, palpal tibia and metatarsus suffused with dark gray; leg I total length: 2.35; leg III total length: 1.70; Tm I: 0.27, Tm IV: absent. GENITALIA: Epigynum with proximal part of scape anteriorly narrow, enlarging (more than 5x ); epigynal slits elongated, almost touching; pit hook depression absent ( Fig. 271 ); lateral lobes very large; stretcher small; pit average ( Fig. 272 ). Median part of scape long, narrow; genital pores situated at base of lateral lobes pockets ( Fig. 273 ). Internal genitalia with an oval, ventral receptacula and a dorsal, elongated receptacula obliquely positioned ( Figs 272, 273 ).