Bioacoustics of Agyneta serrata

Description: Male : Total length 1.31; carapace length 0.57, width 0.42. CEPHALOTHORAX: Carapace light orange, shiny, finely reticulate; radiating lines, margin suffused with dark gray; trident mark present. Sternum light orange, suffused with dark gray. Clypeus height 2. Chelicerae light orange, with transverse dark gray suffused band, not excavated; seta-tipped tubercles absent; promargin five teeth, retromargin four denticles. Cheliceral stridulatory organ ~19 striae, well spaced throughout. ABDOMEN: Uniformly light to dark gray, sometimes with apical white hourglass mark. LEGS: Light yellow, femurs lightly suffused with gray; leg I total length: 2.07; leg III total length: 1.43; Tm I: 0.23, Tm IV: absent. GENITALIA: Palpal retrolateral tibial apophysis small, pointed and smooth; dorsal tibial apophysis reduced, rugose; two retrolateral trichobothria and one dorsal ( Fig. 443 ). Cymbium triangular; glabrous depression present ( Fig. 443 ); dorsal cymbial tubercle triangular, smooth; ventral tubercle triangular, rugose; prolateral notch medium ( Fig. 444 ). Paracymbium apical pocket long, anterior pocket long and curved making a small cover, posterior pocket absent ( Fig. 443 ). Embolus tip pointed, no retrolateral extension; basally with one spine; ventrally with numerous small spines; retro-ventrally with numerous large spine-like extensions; Fickert’s gland absent; ventral lamella reduced or absent; thumb going slightly over the embolus proper ( Fig. 445 ). Embolus proper set apically, part about equal, not serrated with associated large prong ( Fig. 445 ). Anterior terminal apophysis tip wide with long protrusions and one small basal prong; posterior terminal apophysis short with well sclerotized tip and basal prong; lamella characteristica large, square and with one pointed tip ( Fig. 446 ). Female : Total length 1.35; carapace length 0.57, width 0.41. CEPHALOTHORAX: Same coloration as male. Chelicerae yellowish; promargin six teeth, retromargin five denticles. Cheliceral stridulatory organ ~19 striae, well spaced throughout. ABDOMEN: Same as male, sometimes with the typical white hourglass mark. LEGS: Same as male; palpal segments suffused with dark gray, palp tarsus normal, claw absent; leg I total length: 1.98; leg III total length: 1.41; Tm I: 0.25, Tm IV: absent. GENITALIA: Epigynum with proximal part of scape wide, deeply excavated; epigynal slits M-shaped; pit hook depression deep ( Fig. 447 ); lateral lobes medium; stretcher and pit small ( Fig. 448 ). Median part of scape long and wide; genital pores situated at base of lateral lobes pockets ( Fig. 449 ). Internal genitalia with rounded ventral receptacula, dorsal receptacula elongated ( Figs 448, 449 ).