Bioacoustics of Ibotyporanga diroa

Redescription of male MEASUREMENTS (ZFMK Ar 24360). Total body length 2.0, carapace width 0.90. Distance PME–PME 80 µm; diameter PME 80 µm; distance PME–ALE 30 µm; distance AME–AME 25 µm; diameter AME 60 µm. Leg 1: 5.37 (1.40 +0.33 + 1.37 +1.77 +0.50), tibia 2: 1.07, tibia 3: 0.97, tibia 4: 1.38; tibia 1 L/d: 12; diameters of leg femora 0.19–0.20, of leg tibiae 0.11. Tibia 1 in two other newly examined males: 1.33, 1.40; in holotype : 1.44. COLOUR (in ethanol). Prosoma and legs mostly ochre-yellow, carapace medially and ocular area slightly darker, legs with darker rings on femora (subdistally) and tibiae (proximally and subdistally); abdomen pale gray with many darker internal marks dorsally and laterally; ventrally with indistinct light ochre plates in front of gonopore and in front of spinnerets. BODY . Habitus as in Fig. 55E . Ocular area slightly raised. Carapace with distinct but shallow thoracic groove. Clypeus with sclerotized rim with median notch. Sternum wider than long (0.58/0.50), with pair of low and indistinct anterior processes near coxae 1. Abdomen globular. CHELICERAE . As in Fig. 71A–B ; width 0.33; with short median frontal apophysis; stridulatory files very fine and poorly visible in dissecting microscope. PALPS . As in Fig. 69 ; coxa unmodified; trochanter with short ventral protrusion; femur very slender, proximally with distinct retrolateral process directed toward distal, with prolateral stridulatory pick, distally widened but unmodified; femur-patella joints not shifted toward one side; patella dorsally ~1.7 × as long as medially wide; tibia with two trichobothria in relatively proximal position, with conical process ventrally; tibia-tarsus joints slightly shifted toward retrolateral side; tarsus with indistinct dorsal protrusion; procursus ( Fig. 70A–C ) very long and slender, with light prolateral band, with tiny subdistal side branch (160 µm from tip); genital bulb ( Fig. 70D–F ) with distinct prolateral sclerite on bulbous part, embolus with simple distal elements. LEGS . Without spines but with longer hairs ventrally on femora; without curved hairs; with several rows of short vertical hairs on tibia 1; retrolateral trichobothrium of tibia 1 at 58%; prolateral trichobothrium absent on tibia 1; tarsus 1 with ~3–4 pseudosegments, distally fairly distinct. Description of female In general, similar to male ( Fig. 55F ) but slightly darker; clypeus and sternum unmodified; tibia 1 with few short vertical hairs; tibia 1 length in ten females: 1.40–1.63 (mean 1.49). Epigynum ( Fig. 72A–B ) anterior plate trapezoidal to oval, posterior margin almost straight, anteriorly with whitish median area, with wide and shallow pocket medially on epigynal plate, at posterior end of whitish area; posterior plate relatively small. Internal genitalia ( Figs 71C , 72C–D ) with pair of roughly rectangular, sclerotized pore plates connected to large posterior membranous structures diverging posteriorly; large expandable anterior sac with pair of small lateral pockets (arrows in Fig. 72D ).