Bioacoustics of Priscula pastaza

Description Male ( holotype ) MEASUREMENTS . Total body length 4.2, carapace width 1.7. Distance PME–PME 200 µm; diameter PME 130 ×150 µm; distance PME–ALE 50 µm; AME absent (cf. female: Fig. 41A ). ALE and PLE larger than PME (diameter ALE 180 µm, PLE 160 µm). Leg 1: 41.4 (10.3+0.8+ 10.4 +17.5 +2.4), tibia 2: 7.7, tibia 3: 5.7, tibia 4: 7.3; tibia 1 L/d: 69. COLOR (in ethanol). Carapace light-brown, with whitish marks beside ocular area, clypeus with large light brown band narrowing towards chelicerae; sternum light brown with thin darker brown margins; legs monochromous light brown, without darker rings; abdomen monochromous pale gray, only ventrally with darker ochre mark in gonopore area. BODY . Habitus as in Fig. 6A . Ocular area raised, without hump on posterior side, with comb of stronger hairs at median side of each ocular triad. Deep thoracic groove. Clypeus unmodified except sclerotized rim. Sternum wider than long (1.15/0.80), unmodified. Abdomen globular to slightly higher than long, dorso-posteriorly rounded. CHELICERAE . As in Fig. 31A–B , with short entapophyses, pair of short frontal apophyses close to fang joints; without stridulatory ridges. PALPS . As in Fig. 29A–C ; coxa unmodified, trochanter slightly protruding ventrally, femur large, with unsclerotized retrolateral process proximally followed distally by sclerotized indentation, distal ventral rim not protruding; patella ventrally reduced to strongly sclerotized narrow rim; tibia small relative to femur; palpal tarsal organ exposed, weakly raised ( Fig. 43C ); procursus ( Fig. 30A–C ) with distinct whitish protruding area dorsally, distinctive prolateral and dorsal membranous elements composed of hair-like processes (dorsal part shown in Fig. 42D–E ), distal ventral sclerite flat and weakly sclerotized; genital bulb ( Fig. 30D–F ) with small proximal sclerite connecting to tarsus, with large whitish area on retrolateral-ventral side, strong and slightly spiraling main bulbal process with subdistal sperm duct opening (arrow in Fig. 42H ) and obtuse tip. LEGS . Without spines; with curved hairs on tibiae and metatarsi (mainly legs 1 and 2); with few short vertical hairs; retrolateral trichobothrium of tibia 1 at 6%; prolateral trichobothrium present on all leg tibiae; tarsi without regular pseudosegmentation but rather with many indistinct platelets. Male (variation) Tibia 1 in three other males: 9.3, 11.0, 11.3. AME pigment always present but lenses tiny (~20 µm diameter) or absent. Female In general similar to male ( Fig. 6B ) but clypeus rim not sclerotized and hairs on ocular area unmodified. AME variable as in males. Tibia 1 in five females : 7.7–8.8 (mean 8.2). Tarsal organs exposed ( Fig. 43G–H ); main tarsal claws with ~14–17 tines, tarsus 4 claws more evenly curved and with shorter tines than tarsi 1–3 claws ( Fig. 44C–D, F ). ALS with one strongly widened spigot, one pointed spigot, and one large and four small cylindrical spigots ( Fig. 41C ); with distinctively sculptured area medially in front of ALS ( Fig. 41H ). Epigynum ( Fig. 32A–B ) main anterior plate semicircular, slightly protruding, posteriorly with lighter semicircular area; posterior epigynal plate medially divided by whitish area. Internal genitalia ( Fig. 31C ) with simple sclerotized arc, membranous ‘valve’, and pair or roundish pore plates.