Bioacoustics of Agyneta unimaculata

Female : Total length 1.83; carapace length 0.74, width 0.58. CEPHALOTHORAX: Colorations as male. Clypeus height 3. Chelicerae promargin four denticles, retromargin three tiny denticles. Cheliceral stridulatory organ easily visible ~10 striae, well spaced. ABDOMEN: Coloration as male. LEGS: Coloration as male; palpal tarsal claw absent, palpal segments, strongly suffused with dark gray; leg I total length: 2.72; leg III total length: 2.03; Tm I: 0.25, Tm IV: absent. GENITALIA: Epigynum with wide proximal part of scape, slightly enlarging into a oval plate; epigynal slits extremely narrow and curved; pit hook depression indistinguishable ( Fig. 313 ); lateral lobes very long with constriction ( Fig. 313 ); stretcher medium; pit deep ( Fig. 314 ). Median part of scape long and narrow; genital pores situated at base of lateral lobes pockets ( Fig. 315 ). Internal genitalia with elongated ventral receptacula and small rounded dorsal one, vertically positioned ( Figs 314, 315 ).

Description: Male : Total length 1.93; carapace length 0.85, width 0.61. CEPHALOTHORAX: Carapace yellow-brown, shiny, finely reticulate; lightly suffused with gray along radiating lines and pars cephalica. Sternum suffused with gray. Clypeus height 3. Chelicerae apical half yellow, basal half suffused with dark gray; not excavated; seta-tipped tubercles absent; promargin five denticles, retromargin four tiny denticles. Cheliceral stridulatory organ easily visible ~17 striae, widely spaced. ABDOMEN: Uniformly light to dark gray. LEGS: Light yellow, base of femur slightly suffused with dark gray; leg I total length: 2.98; leg III total length: 2.11; Tm I: 0.22, Tm IV: absent. GENITALIA: Palpal retrolateral tibial apophysis long and pointed; dorsal tibial apophysis curved with 4–5 pointed spurs; two retrolateral trichobothria and one dorsal ( Fig. 309 ). Cymbium triangular; glabrous depression present ( Fig 309 ); dorsal cymbial tubercle smooth; ventral cymbial tubercle rugose; prolateral notch shallow ( Fig 310 ). Paracymbium apical pocket medium, anterior pocket long, posterior pocket absent ( Fig. 309 ). Embolus tip narrow with small prong; one large spikes basally; numerous small spines ventrally; Fickert’s gland absent; ventral lamella reduced or absent; thumb reaching the embolus proper ( Fig. 311 ). Embolus proper set apically on a vertical ridge, of equal part ( Fig. 311 ). Anterior terminal apophysis wide with numerous, curved protrusions; posterior terminal apophysis narrow, tip curved fused to a wide lamella characteristica with one large prong ( Fig. 312 ).