Bioacoustics of Agyneta grandcanyon

Description: Male : Total length 1.64; carapace length 0.78, width 0.64. MAP. 23. Localities of Agyneta barrowsi ( Chamberlin & Ivie 1944 ) , Agyneta grandcanyon n. sp. CEPHALOTHORAX: Carapace light yellow-orange, shiny, finely reticulate; suffused with gray along radiating lines. Sternum suffused lightly with gray, darker along margin, reaching all the way between coxae four to the pedicel. Cypeus low ( 2x AME). Chelicerae light yellow; not excavated, seta-tipped tubercles absent; promargin three denticles, retromargin three tiny denticles. Cheliceral stridulatory organ ~14 striae, well spaced throughout. ABDOMEN: Off-white with dark median band and transverse bands on posterior half or dark median band broken, with a large arrow-shaped mark ( Fig. 330 ) or else same as female, off-white with basal, lateral dark marks ( Fig. 331 ). LEGS: Light yellow; leg I total length: 3.61; leg III total length: 2.37; Tm I: 0.23, Tm IV: absent. GENITALIA: Palpal retrolateral tibial apophysis long, smooth and narrow; dorsal tibial apophysis with curved, pointed tip; two retrolateral trichobothria and one dorsal ( Fig. 326 ). Cymbium triangular; glabrous depression present ( Fig 326 ); dorsal cymbial tubercle small, smooth and pointed; ventral tubercle large and smooth; prolateral notch shallow ( Fig. 327 ). Paracymbium apical pocket short, anterior pocket short, posterior pocket absent ( Fig. 326 ). Embolus tip wide, rounded with long prong; ventrally rugose; basally with one large spike; Fickert’s gland absent; ventral lamella absent; thumb reaching the embolus proper ( Fig. 328 ). Embolus proper set apically on a vertical ridge, of equal part ( Fig. 326 ). Anterior terminal apophysis large with numerous, long protrusions and extra bifid apophysis basally; posterior terminal apophysis long, basally with large tooth-like extension with numerous small spines; lamella characteristica elongated with pointed tip ( Fig. 329 ). Female : Total length 1.88; carapace length 0.68, width 0.58. CEPHALOTHORAX: Coloration as in male. Chelicerae light yellow; promargin four denticles, retromargin two tiny denticles. Clypeus height 2. Cheliceral stridulatory organ visible ~10 striae, well spaced. ABDOMEN: Off-white with median dark band and dark transverse band or off-white with small, dark latero-basal marks ( Fig. 331 ). LEGS: Same as male; palpal tarsal claw absent; leg I total length: 3.90; leg III total length: 2.71; Tm I: 0.24; Tm IV: absent. GENITALIA: Epigynum with long and narrow proximal part of scape, slightly narrowing apically; epigynal slits large; pit hook depression absent ( Fig. 332 ); lateral lobes very long; stretcher long; pit deep ( Fig. 335 ). Median part of scape long, narrow and parallel; genital pores located at the base of the lateral lobes ( Fig. 334 ). Internal genitalia with rounded ventral receptacula, dorsal receptacula elongated ( Figs 333, 334 ).