Bioacoustics of Kambiwa neotropica

Redescription Male (ZFMK Ar 24707) MEASUREMENTS . Total body length 1.32, carapace width 0.50. Distance PME–PME 50 µm; diameter PME 50 µm; distance PME–ALE 20 µm; distance AME–AME 10 µm; diameter AME 30 µm. Leg 1: 2.60 (0.70+ 0.18 + 0.66+ 0.68 + 0.38), tibia 2: 0.56, tibia 3: 0.51, tibia 4: 0.78; tibia 1 L/d: 10; diameters of leg femora 115 µm, of leg tibiae 65 µm. COLOR (in ethanol). Prosoma and legs ochre-yellow, carapace and legs without darker marks or rings; abdomen ochre-gray, with darker internal marks and indistinct darker plate in front of gonopore. BODY . Habitus as in close relatives (e.g., Fig. 2E ). Ocular area not raised. Carapace without thoracic groove. Clypeus unmodified. Sternum slightly wider than long (0.36/0.32), with small but distinct anterior humps near coxae 1 (~20 µm high, 40 µm diameter at basis; contra Huber 2000 ). Abdomen globular. CHELICERAE . As in Fig. 17A–B ; with pair of small frontal apophyses; stridulatory files very fine and poorly visible in dissecting microscope. PALPS . As in Fig. 15 ; coxa unmodified; trochanter ventrally slightly protruding; femur proximally with small ventral conical process, distally widened but otherwise unmodified; femur-patella condyles slightly shifted toward prolateral side; tibia-tarsus condyles barely shifted toward retrolateral side; tarsus with small prolateral sclerotized process; procursus ( Fig. 16A–C ) wide in lateral view, narrower in dorsal view, with distinctive pair of distal tips connected by transparent membrane; genital bulb ( Fig. 16D–F ) with hooked ventral process, two distinctive prolateral-dorsal sclerites, and large membranous element (putative embolus) accompanied by retrolateral-dorsal process barely reaching palpal trochanter. LEGS . Without spines, without curved hairs; with short vertical hairs on tibia 1 (contra Huber 2000 ); retrolateral trichobothrium of tibia 1 at 56%; prolateral trichobothrium absent on tibia 1; tarsus 1 with ~4–5 pseudosegments, distally fairly distinct. Variation (males) Tibia 1 in 22 males : 0.58–0.72 (mean 0.64). Dark abdominal marks variably distinct. Females In general similar to males but sternum without humps and chelicerae without stridulatory files. Tibia 1 in 46 females : 0.52–0.66 (mean 0.60). Epigynum ( Fig. 18A–B ) anterior plate semicircular, weakly protruding, with pair of lateral posterior sclerites; posterior plate large but simple, roughly rectangular. Internal genitalia ( Figs 17C , 18C–F ) with weakly curved transversal sclerite connected laterally to lateral posterior sclerites of anterior epigynal plate, medially with anterior sclerotized element leading to membranous sac, and two pairs of membranous pouches/sacs ( Fig. 18F ); apparently without pore plates. Barcoding Three specimens were barcoded, from Rio Grande do Norte , Piauí , and Ceará . The K2P distances ranged from 1.6 to 3.5% ( Table 2 ).