Bioacoustics of Agyneta hum

Description. Male holotype (FCE-Ar 13039). Total length: 2.01; carapace length: 0.93, width: 0.67; abdomen length: 1, width: 0.62. CEPHALOTHORAX: Eyes diameters and interdistances: AME: 0.06, PME: 0.08, ALE: 0.08 and PLE: 0.07; AME–ALE: 0.05, PME–PLE: 0.05, AME–AME: 0.02, PME–PME: 0.03. Eyes margined with black, suffused with black between AME and between ALE and PLE. Carapace ovoid, longer than wide, brownish orange ( Figs 1G–H ). Labium orange. Sternum pale orange, with scattered setae. Clypeus height: 0.16. Chelicerae length: 0.53; brownish orange, with proximal promargin striated; seta-tipped tubercles absent; promargin four denticles and pointed projection, retromargin four denticles and pointed projection near the base of the fang. Cheliceral stridulatory organ ~71 striae, well-spaced getting closer together basally ( Fig. 5A ). ABDOMEN: Elliptic, longer than wide, dorsally brownish gray with median transverse light gray stripe ( Figs 1G–H ), ventrally light gray to brownish gray to the extremes. Spinnerets and colulus brownish gray. LEGS: light orange; leg I total length: 3.59; leg III total length: 1.91; Tm I: 0.31, Tm IV: absent. GENITALIA: Palpal retrolateral tibial apophysis pointed and sclerotized ( Figs 1A, 1E , 5B ); dorsal tibial apophysis well developed, finger-like ( Figs 1A, E , 5B ); two retrolateral trichobothria and a dorsal one ( Figs 1A, E ). Cymbium rounded; glabrous depression absent; retrolateral cymbial tubercle present with tiny spike; dorsal cymbial tubercle apically rounded and dentated; ventral cymbial tubercle apically truncated and dentated ( Figs 1A–B, 1F , 5B–C, 5E ); membranous region present ( Figs 1A , 5B ); prolateral notch absent ( Figs 1B , 5C ). Paracymbium apical pocket present, anterior pocket long and curved, posterior pocket present ( Figs 1A , 5B ). Embolus tip pointed, narrow at the apex becoming broader ( Figs 1B–C ); Fickert’s gland present basally of the sperm duct ( Fig. 1C ); ventral lamella absent ( Fig. 1C ); thumb short reaching below the embolus proper ( Fig. 1C ). Embolus proper peak shaped and set apically in the embolus ( Fig. 1C ). Anterior terminal apophysis long and narrow, tip with protrusions ( Figs 1A, D ); posterior terminal apophysis trisected (i.e., divided into three lobes nearly up to the base), basally with a large ensiform extension and a bifid semi-membranous prong ( Fig. 1D ). Embolic membrane fimbriated ( Figs 1A–B ); lamella characteristica t-shaped, longer than wide, with thorns distally ( Figs 1A, 1D , 5B, 5D ). Female paratype (FCE-Ar 13953). Total length: 2.08; carapace length: 0.87, width: 0.58; abdomen length: 1.32, width: 0.75. CEPHALOTHORAX: Eyes diameters and interdistances: AME: 0.05, PME: 0.06, ALE: 0.06 and PLE: 0.04; AME–ALE: 0.04, PME–PLE: 0.05, AME–AME: 0.02, PME–PME: 0.03. Eyes margined with black, suffused with black between AME and between ALE and PLE. Carapace ovoid, longer than wide, brownish orange ( Figs 2E–F ). Labium orange. Sternum light orange, with scattered setae. Clypeus height: 0.12. Chelicerae length: 0.42; brownish orange; seta-tipped tubercles absent; promargin four denticles (larger than the retromargin ones), retromargin four denticles. Cheliceral stridulatory organ ~59 striae, narrowly spaced throughout ( Fig. 7A ). ABDOMEN: Elliptic, longer than wide, gray ( Figs 2E–F ). Spinnerets and colulus brownish gray. LEGS: light orange, leg I total length: 3.22; leg III total length: 2.58; palpal tarsal claw absent; Tm I: 0.28, Tm IV: absent. Colulus present. GENITALIA: Epigynum with the proximal part of scape almost as wide as long and slightly wider than the lateral lobes, sides straight, slightly tapering apically; epigynal slits oval; pit hook depression shallow ( Figs 2A , 7B ); lateral lobes inner margins straights and outer margins convex; stretcher and pit small ( Figs 2A, 2C , 7B ). Median part of the scape long and narrow ( Figs 2C–D ); genital pores at the base of lateral lobes pockets ( Figs 2B–D ). Internal genitalia with a large, reniform dorsal receptacula ( Figs 2B–C ). Variation. Total length ( 6 males ): 1.87–2.10; carapace length: 0.85–0.93, width: 0.56–0.70; leg I total length: 3.36–3.85; leg III total length: 1.91–2.61. Total length ( 6 females ): 1.90–2.14; carapace length: 0.75–0.87, width: 0.57–0.61; leg I total length: 3.14–3.34; leg III total length: 2.30–2.58. Coloration is variable in both sexes. Some males lack the median transverse light gray stripe in the abdomen and have a uniform brownish-gray or even white abdomen. Some females have a brownish-gray abdomen, with or without a white dorsal posterior spot. Natural history: Agyneta hum n. sp. was found in native riparian and swamp forests. Both males and females were collected using pit-fall traps, leaf litter manual collection, manual collection, G-Vac and beating tray.