Bioacoustics of Guaranita goloboffi

Redescription (amendments; see Huber 2000 ) Measurements of male from Cabra Corral, ‘site 3’: total body length 1.08, carapace width 0.40; distance PME–PME 40 µm; diameter PME 45 µm; distance PME–ALE 20 µm; distance AME–AME 20 µm; diameter AME 25 µm. Leg 1: 2.02 (0.56+0.14 +0.50 +0.48 + 0.34), tibia 2: 0.42, tibia 3: 0.38, tibia 4: 0.63; tibia 1 L/d: 8; diameters of leg femora 0.090 – 0.095 ; of leg tibiae: 0.060. Tibia 1 in 19 males (incl. males in Huber 2000 ): 0.49 – 0.59 (mean 0.53). Sternum slightly wider than long (0.32/0.30). Chelicerae as in Fig. 25A – C ; stridulatory files ( Fig. 27G ) with ~17 – 19 ridges each; distances between ridges proximally ~0.6 µm, distally ~2.7 µm. Pedipalp as in Fig. 24A – C ; tibia with two trichobothria; palpal tarsal organ capsulate ( Fig. 28A – B ), raised, with small opening (diameter of opening 1.45 µm); procursus as in Figs 25D – F and 29A – C , with large transparent ventral membrane, distinctive dorsal flap, and tip bent towards dorsal; genital bulb as in Figs 25G – I and 29A – F , with simple proximal sclerite, distal sclerite widened in mid-section. Legs without spines and curved hairs; vertical hairs not seen in dissecting microscope but present in two retrolateral rows on tibia 1 ( Fig. 30A – B ); prolateral trichobothrium absent on tibia 1, present on other leg tibiae; metatarsus 4 with a few slender hairs on retrolateral-ventral side (as in female, cf. Fig. 30C ); tarsus 4 with single prolateral comb-hair (as in female, cf. Fig. 31D ). Gonopore with four epiandrous spigots ( Fig. 27F ). Tibia 1 in 55 newly collected females 0.48 – 0.58 (mean 0.52). Female internal genitalia ( Fig. 26C – D ) with strong median structure; apparently with small pore plates ( Fig. 32E ). Each ALS ( Fig. 27C – E ) with one strongly widened spigot, one long pointed spigot, and five cylindrical spigots (of which one is much wider than the others); each PMS with two conical spigots ( Fig. 27D ); PLS without spigots. Leg tibiae and metatarsi with tiny pores with cuticular rim (pore diameter 0.5 µm; Fig. 31A ) and with small round cuticular ‘plates’ (diameter 4 – 5 µm; Fig. 31A ). Tarsal organs with very small openings (palp: 1.2 µm; legs: ~0.8 µm; Figs 28C – D , 31B ). Metatarsi 3 and 4 with long slender hairs as in male ( Fig. 30C ); tarsus 4 with single prolateral comb-hair as in male ( Fig. 31D ).