Bioacoustics of Guaranita dobby

Male holotype . Total length 1.16, carapace width 0.42; leg 1: (0.15 + 0.08 + 0.63 + 0.14 + 0.59 + 0.50, tarsus missing), tibia II: 0.50, tibia III: 0.45, tibia IV missing; tibia I L/d: 9. Lateral habitus as in Figure 9 ; entire prosoma pale ocher-yellow. Carapace without thoracic groove; distance PME–ALE about 30% of PME diameter; clypeus with an anterior hooked projection; sternum with a pair of small frontal humps (Figure 373, in Huber, 2000 ); chelicerae resemble those of G. goloboffi , with a pair of long, distally hooked, and frontal apophyses, with few stridulatory ridges laterally ( Figure 10 ), stridulatory pick is a modified hair proximally on palpal femur (see arrow in Figure 11 ); palp in general as in G. munda , except by meaningfully different procursus, with a smaller and concave dorsal flap and slightly different distal sclerites ( Figure 12 ), coxa without a retrolateral apophysis, femur almost cylindrical, wider distally, tibia globular, bulb as in Figure 11 . Legs without rings; probably without spines, without curved and vertical hairs (most hairs missing). Opisthosoma gray, ventrally pale, with slightly darker genital plate ( Figure 9 ).

Redescription of male (amendments; see Torres et al . 2016 ) Measurements of male from 55 km NW of Campo Quijano: total body length 1.1 (1.2 with clypeus process), carapace width 0.48; distance PME–PME 45 µm; diameter PME 40 µm; distance PME–ALE 20 µm; distance AME–AME 20 µm; diameter AME 25 µm. Leg 1: 2.33 (0.66 +0.16 + 0.62 +0.55 +0.34), tibia 2: 0.54, tibia 3: 0.48, tibia 4: 0.72; tibia 1 L/d: 9; diameters of leg femora 0.10 – 0.11, of leg tibiae: 0.065. Tibia 1 of second newly collected male: 0.58. Tip of clypeus process straight but at tip with hairs pointing upwards and backwards. Sternum slightly wider than long (0.34/0.30). Chelicerae as in Fig. 4A – C . Pedipalp as in Fig. 3A – C ; tibia with two trichobothria; procursus as in Fig. 4D – F , with large transparent ventral membrane, distinctive dorsal flap, and tip bent towards dorsal; genital bulb as in Fig. 4G – I , with simple proximal sclerite and band-like distal sclerite (same width over most of its length). Legs without spines and curved hairs; vertical hairs not seen; retrolateral trichobothrium of tibia 1 at 60%; prolateral trichobothrium absent on tibia 1, present on other leg tibiae; tarsus 1 with 5 pseudosegments, poorly visible in dissecting microscope. Description of female In general similar to male ( Fig. 2A – B ) but clypeus without process, sternum without pair of anterior humps, and chelicerae without stridulatory files. Tibia 1 in seven females : 0.58 – 0.64 (mean 0.62). Epigynum ( Figs 5A , 6B ) with simple triangular anterior plate weakly bulging; posterior plate short and simple. Internal genitalia ( Figs 5C – D , 32A ) very simple, with median sclerotized structure (receptacle?), apparently with small pore plates. Each ALS with one strongly widened spigot, one long pointed spigot, and five cylindrical spigots (of which one is much wider than the others; Fig. 6C ); each PMS with two conical spigots ( Fig. 6D ); PLS without spigots. Leg tibiae and metatarsi with tiny pores with cuticular rim (pore diameter 0.6 µm; Fig. 6E – F ) and with small round cuticular ‘plates’ (diameter 4 – 5 µm; Fig. 6E ). Tarsal organs with very small openings (diameters of openings 0.8 – 0.9 µm; Fig. 7D – E ). Metatarsi 3 and 4 with one long slender hair each on retrolateral side ( Fig. 7C ). Remarks (notes on type locality) This species was previously known from two specimens supposedly from two localities in Salta province : the holotype locality, 9 km E of Cabra Corral dam; and a second locality, 1 km N of “Charrillos” (should be Chorrillos). Our newly collected specimens of G. dobby are from close to the second locality, in the same river valley, ~ 37 km NW of Chorrillos. However, we failed to find G. dobby at the holotype locality and at several nearby sites E of Cabra Corral dam we visited. Instead, we found G. goloboffi at two sites in that area. Previous collectors also found numerous specimens of G. goloboffi E of Cabra Corral dam ( Torres et al. 2015 ). This sheds doubt on the origin of the G. dobby holotype . We suspect that the holotype specimen is mislabeled but according to José Corronca (pers. com. Jan. 2022 ) this is unlikely to be the case. Natural history The newly collected specimens were found under rocks in a very arid environment ( Fig. 34A ). Egg sacs (N = 4) contained 6 – 8 eggs and were carried in a single layer under the prosoma ( Fig. 2B ); egg diameter: 0.46 – 0.48.