Bioacoustics of Agyneta barfoot

Description: Male : Total length 1.92; carapace length 0.83, width 0.66. CEPHALOTHORAX: Carapace orange, shiny, finely reticulate; margin, radiating lines strongly suffused with dark gray; trident mark often present. Sternum strongly suffused with dark gray. Clypeus height 3. Chelicerae orange, excavated; ~ 13 seta-tipped tubercles; promargin four teeth, retromargin four tiny denticles; both margins with rounded projection at base of fang. Cheliceral stridulatory organ ~ 64 striae, narrowly spaced. ABDOMEN: Oval, uniformly light to dark gray or with five dark gray chevrons ( Fig. 278 ) LEGS: Yellow-orange; femora with retrolateral and prolateral sides suffused with gray; leg I total length: 3.44; leg III total length: 2.50; Tm I: 0.20, Tm IV: absent. GENITALIA: Palpal retrolateral tibial apophysis elongated and rugose; dorsal tibial apophysis short, rounded and rugose; two retrolateral, one dorsal trichobothrium ( Fig. 274 ). Cymbium triangular; glabrous depression present ( Fig. 274 ); prolateral notch shallow; dorsal cymbial turbercle sharp, pointed and smooth; ventral cymbial tubercle elongated, rounded and smooth ( Fig. 275 ). Paracymbium apical pocket medium, anterior pocket short and curved, posterior pocket small and straight ( Fig. 274 ). Embolus tip pointed and thin; basally with large prong; Fickert’s gland basal, slightly enlarged; ventral lamella transparent, pointed; thumb short, reaching below the embolus proper ( Fig. 276 ). Embolus proper set apically, of equal part ( Fig. 276 ). Anterior terminal apophysis long with very few short protrusions and a large well sclerotized, pointed process basally; posterior terminal apophysis pointed; lamella characteristica long, with trident-shaped tip ( Fig. 277 ). Female : Total length 2.02; carapace length 0.88, width 0.65. CEPHALOTHORAX: Coloration as in male. Chelicerae promargin five teeth, retromargin five denticles. Cheliceral stridulatory organ ~51 striae, narrowly spaced. ABDOMEN: Oval, uniformly light to dark gray or with five dark gray chevrons ( Fig. 279 ). LEGS: Coloration as male; palpal tarsal claw absent, palpal tibia and metatarsus suffused with dark gray; leg I total length: 3.46; leg III total length: 2.58; Tm I: 0.26, Tm IV: absent. GENITALIA: Epigynum with wide proximal part of scape; epigynal slits extremely large; pit hook depression absent ( Fig. 280 ); lateral lobes elongated; stretcher small; pit deep ( Fig. 281 ). Median part of scape long, narrow; genital pores situated at base of lateral lobes pockets ( Fig. 282 ). Internal genitalia with elongated, obliquely positioned ventral and dorsal receptaculas ( Figs 281, 282 ).