Bioacoustics of Agyneta watertoni

Description: Male : Total length 1.57; carapace length 0.74, width 0.54. CEPHALOTHORAX: Carapace dark brown, shiny, finely reticulate; suffused with dark gray along margin, radiating lines; trident mark present. Sternum dark brown strongly suffused with dark gray. Clypeus height 4. Chelicerae dark brown, excavated; seta-tipped tubercles absent; promargin two teeth, retromargin one denticle, both margins without projections near base of fang. Cheliceral stridulatory organ ~65 striae, narrowly spaced throughout. ABDOMEN: Uniformly dark gray. LEGS: Orange; leg I total length: 2.03; leg III total length: 1.65; Tm I: 0.71, Tm IV: present. GENITALIA: Palpal retrolateral tibial apophysis rounded, smooth; dorsal tibial apophysis rounded, slightly rugose; one retrolateral and one dorsal trichobothria ( Fig. 104 ). Cymbium triangular; glabrous depression present ( Fig. 104 ); dorsal cymbial tubercle absent; ventral cymbial tubercle smooth and conical; prolateral notch shallow ( Fig. 105 ). Paracymbium apical pocket short, anterior pocket curved making a large cover, posterior pocket long and curved, creating a large cover ( Fig. 104 ). Embolus tip pointed, straight; basal flange wide, pointed; Fickert’s gland elongated, set basally; ventral lamella transparent, rounded, somewhat rugose; thumb reaching below the embolus proper ( Fig. 106 ). Embolus proper set apically, ventral part wider ( Fig. 106 ). Anterior terminal apophysis narrow with hardly any protrusions; posterior terminal apophysis curved and rounded; lamella characteristica large, strongly serrated ( Fig. 107 ). Female : Unknown.