Bioacoustics of Agyneta aquila

Description: Male : Total length 1.45; carapace length 0.69, width 0.57. CEPHALOTHORAX: Carapace light yellow, shiny, finely reticulate; suffused with dark gray along margin, radiating lines; trident mark present. Sternum yellow suffused with dark gray. Clypeus height 5. Chelicerae light yellow-brown with transverse gray band, excavated; fangs thick and wide; seta-tipped tubercles absent; promargin one tiny denticle, retromargin 0 denticles, both margins without projections near base of fang. Cheliceral stridulatory organ ~51 striae, narrowly spaced throughout. ABDOMEN: Uniformly light gray. LEGS: Yellow; leg I total length: 1.94; Tm I: 0.85, Tm IV: present. GENITALIA: Palpal retrolateral tibial apophysis rounded, smooth; dorsal tibial apophysis rugose; one retrolateral and one dorsal trichobothria ( Fig. 86 ). Cymbium triangular, glabrous depression present ( Fig. 86 ); dorsal cymbial tubercle absent; ventral tubercle large, rounded and smooth; prolateral notch medium ( Fig. 87 ). Paracymbium apical pocket long, anterior pocket curved making a small cover, posterior pocket small and pointed ( Fig. 86 ). Embolus tip pointed, with extension retrolaterally; basal flange with two sharp points; basally with a few spikes; Fickert’s gland elongated, situated medially; ventral lamella serrated, pointed; thumb reaching below the embolus proper ( Fig. 88 ). Embolus proper set apically, ventral part slightly wider ( Fig. 88 ). Anterior terminal apophysis tip wide with a few, short protrusions; posterior terminal apophysis extremely wide, twisted; lamella characteristica large, with two large prongs and a large serrated lamella ( Fig. 89 ). Female : Unknown.