Bioacoustics of Agyneta rurestris

Description: Male : Total length 2.24; carapace length 1.03, width 0.77. CEPHALOTHORAX: Carapace dark orange-brown, shiny, finely reticulate; suffused with gray along margin, radiating lines. Sternum brown suffused with gray. Clypeus height 2. Chelicerae orange, apical part lighter, excavated; ~16 seta-tipped tubercles; promargin four denticles, retromargin four tiny denticles joined together, both margins with rounded projections near base of fang. Cheliceral stridulatory organ ~50 striae, widely spaced apically and gradually getting closer. ABDOMEN: Uniformly light to dark gray. LEGS: Light yellow; leg I total length: 3.77; leg III total length: 2.64; Tm I: 0.23, Tm IV: absent. GENITALIA: Palpal retrolateral tibial apophysis short, rugose; dorsal tibial apophysis wide and rugose; two retrolateral trichobothria and a dorsal one ( Figs 13 , 108 ). Cymbium triangular; glabrous depression present ( Fig. 108 ); dorsal cymbial tubercle pointed, smooth; ventral tubercle absent; prolateral notch shallow ( Figs 14 , 109 ). Paracymbium apical pocket short, anterior and posterior pockets short and curved ( Fig. 108 ). Embolus tip wide and pointed; ventro-basally spiny; basally with spur and small spines; Fickert’s gland absent; ventral lamella thin and serrated; thumb short, well below the embolus proper ( Fig. 110 ). Embolus proper set apically, anterior part slightly serrated ( Fig. 110 ). Anterior terminal apophysis wide with numerous short protrusions; posterior terminal apophysis wide, striated; lamella characteristica large, with row of spurs and ending in two large, sharp points ( Fig. 111 ). Female : Total length 2.15; carapace length 0.91, width 0.65. CEPHALOTHORAX: Same coloration as male. Chelicerae yellow; promargin five teeth, retromargin five denticles. Cheliceral stridulatory organ visible ~40 striae, well spaced apically and narrowly spaced basally. ABDOMEN: Same as male. LEGS: Same as in male; palpal tibia and tarsus brownish, tarsal claw absent; leg I total length: 3.06; leg III total length: 2.24; Tm I: 0.28, Tm IV: absent. GENITALIA: Epigynum with wide proximal part of scape, straight, vertical sides; epigynal slits oval and short; pit hook depression deep ( Fig. 112 ); lateral lobes wide and short, folded; stretcher and pit small ( Fig. 114 ). Median part of scape long, wider apically; genital pores situated at base of lateral lobes pockets ( Fig. 114 ). Internal genitalia with a rounded ventral receptacula and a small oval dorsal one ( Figs 113, 115 ).