Bioacoustics of Agyneta uta

Description: Male : Total length 1.41; carapace length 0.64, width 0.49. CEPHALOTHORAX: Carapace dark brown, shiny, finely reticulate; suffused with dark gray along margin, radiating lines; trident mark often present. Sternum dark brown strongly suffused with dark gray. Clypeus height 1. Chelicerae brown apical part lighter, with transverse dark gray band, not excavated; seta-tipped tubercles absent; promargin three denticles, retromargin three denticles; without projections near base of fang. Cheliceral stridulatory organ ~34 striae, well spaced getting closer together basally. ABDOMEN: Uniformly dark gray. LEGS: Yellow; leg I total length: 2.04; leg III total length: 1.60; Tm I: 0.32, Tm IV: absent. GENITALIA: Palpal retrolateral tibial apophysis short, rounded and smooth; dorsal tibial apophysis absent; two retrolateral trichobothria and a dorsal one ( Fig. 165 ). Cymbium triangular; glabrous depression present ( Fig. 165 ); cymbial tubercles absent; prolateral notch absent ( Fig. 166 ). Paracymbium apical pocket small, anterior pocket curved and deep, not reaching the short and curved posterior pocket ( Fig. 165 ). Embolus tip pointed, straight, with small retrolateral extension; Fickert’s gland absent; ventral lamella pointed, transparent; thumb short reaching below the embolus proper ( Fig. 167 ). Embolus proper set apically, both part of equal size ( Fig. 167 ). Anterior terminal apophysis narrow with no protrusions; posterior terminal apophysis striate; lamella characteristica large, ending in a wide curved tip with numerous spines ( Fig. 168 ). Female : Total length 2.01; carapace length 0.76, width 0.51. MAP. 9. Localities of Agyneta uta ( Chamberlin1920 ) . CEPHALOTHORAX: Same coloration as male. Chelicerae yellow; promargin four teeth, retromargin four denticles. Clypeus height 1. Cheliceral stridulatory organ ~29 striae, well spaced getting closer together basally. ABDOMEN: Same as male. LEGS: Same as male; palpal tarsal claw absent; leg I total length: 2.49; leg III total length: 1.84; Tm I: 0.24, Tm IV: absent. GENITALIA: Epigynum with proximal part of scape triangular tinted with grayish mark; epigynal slits oval; pit hook depression absent ( Fig. 169 ); lateral lobes short and wide; stretcher seemingly absent; pit small ( Fig. 170 ). Median part of scape short and wide; genital pores situated at base of lateral lobes pockets ( Fig. 171 ). Internal genitalia with an elongated ventral receptacula and an oval dorsal one ( Figs 170, 171 ).