Bioacoustics of Adelosgryllus similis

Remarks on paratypes . Male paratype . A pair of dark spots at vertex; right tegmen lateral field with six poorly marked accessory veins, cordal area without vein 1A, harp with four well marked cross-veins, mirror without the vein inside the larger cell. Measurements (mm/mm2): dorsal field length, 3.75; dorsal field width, 2.08; harp area, 1.99; mirror area, 1.15; lateral field length, 3.27; lateral field width, 0.8; stridulatory file, 1.36 and 96 teeth; body length, 5.87; pronotum length, 1.13; pronotum width, 1.51; head width, 1.38; interocular distance, 0.74; femur III length, 4.06; tibia III length, 3.53; auditory tympanum area, 0.01; supranal plate length, 0.67; supranal plate width, 1.03; subgenital plate length, 0.8; subgenital plate width, 1.02. Female paratype ( Figs 27–36 ). Body shape and color pattern similar to holotype , slightly bigger in length; the subgenital plate was broken, making it impossible to describe its morphology; supranal plate triangular, apex oval ( Fig. 30 ); ovipositor as long as tibia III, apex acuminate ( Figs 31, 32 ). Copulatory papilla ( Figs 33–36 ): pine shaped, base sclerotized, apex translucent with a ventral indentation, followed by a longitudinal ventral groove. Measurements (mm/mm2): body length, 6.8; pronotum length, 1.15; pronotum width, 1.69; head width, 1.47; interocular distance, 0.89; femur III length, 4.58; tibia III length, 3.76; auditory tympanum area, 0.01; tegmen length, 1.32, tegmen width, 0.54; supranal plate length, 0.68; supranal plate width, 1.12; subgenital plate length, 0.62; subgenital plate width, 1.06; ovipositor length, 3.98; copulatory papilla length, 0.36; copulatory papilla width, 0.2.

Description. Holotype ♂ (Code 01-AMC-PP, Figs 2–9 ). Black body with reddish head (yellowish head in alcohol fixation). Head ( Figs 5–7 ): black eyes with depigmented ommatidia next to the scape; vestigial ocelli; frons between scapes with a dark spot; occiput slightly pubescent with a dark spot behind the eyes; clypeus, labrum and mandibles slightly lighter than the other portions of the head; mandibles dark outlined; antenna ( Fig. 18 ): dilated scape with bristles at the apex, and slightly marked with a light spot on the dorsal and ventral portions; pedicel twice as long as first antennomere, with a slightly median constriction; flagellum black with a central white band; maxillary palp elongate with five dark joints, first and second small and subequal in length, third and fourth subequal in length, and fifth claviform, with ventral portion outlined in white; labial palp three-jointed, lighter than maxillary palp, gradual increase in size toward the apex, third claviform, lighter at the apex. Thorax: pronotum uniformly black, slightly pubescent, dorsal disc wider than long, bearing some long bristles, as well as bristles on the anterior and posterior margins, lateral lobe without bristles on the ventral margin ( Figs 6, 7 ). Right tegmen ( Fig. 26 ): lateral field with one diagonal vein (DV) extending parallel to subcostal (Sc) reaching one-sixth of the length of the lateral field; dorsal field with basal, cordal, harp and mirror areas well developed, apical field absent; medial (M), radial (R) and subcostal veins present, with medial vein bordering the lateral and dorsal fields; basal area with veins anal 1 (1A), anal 2 (2A) and anal 3 (3A) weakly marked; cordal area with 1A, 2A and cubital 2 (Cu2) veins; Cu2* modified in stridulatory file, bordering harp and basal area, with 92 teeth; harp with one medium-longitudinal vein (L), and two cross-veins (Hcv), one of them bifurcated; mirror oval, with one cross-vein (Mcv); a poor marked vein inside the larger cell of mirror; median fan (Mf) reduced. Measurements (mm/mm2): dorsal field length, 3.79mm ; dorsal field width, 2.15mm ; harp area, 2mm 2; mirror area, 1.04mm 2; lateral field length, 3.39mm ; lateral field width, 0.92mm ; stridulatory file length, 1.36mm and 92 teeth ( Figs 2, 4 ); mesothorax wings absent. Legs I ( Figs 10, 13 ): coxa and trochanter whitish, slightly pubescent, with some black bristles; femur basodorsal portion whitish, becoming darker to the apex; tibia uniformly dark, ellipsoid auditory tympanum present in the inner face with a long and thin bristle beside ( Fig. 16 , arrow), two subequal apical spurs; three tarsomeres same color as tibia, first 1/3 longer than second and third together, and second 1/5 longer minor than third. Legs II ( Figs 11, 14 ) slightly darker than leg I, with apical spurs longer than leg I, tarsus same as leg I. Legs III ( Figs 11, 14 ): coxa and trochanter whitish; femur III, anterior portion whitish in inner and outer dark in dorsal portion of external face; tibia uniformly dark, not serrulated; tibia with three inner and three outer subapical spurs ( Fig. 17 , S.S), four inner ( Fig. 17 , d, e, f, g) and three outer ( Fig. 17 , a, b, c) apical spurs; tarsus same as legs I and II, but tarsomere I with two apical spurs. Abdomen ( Fig. 2-4 ): tergites dark, sternites lighter than tergites, with slightly anteroposterior darkening, sternite beside to subgenital plate darker ( Figs 2–4, 9 ); cerci slender, reddish brown, with subapical region slightly darkened and whitish apex ( Figs 2–4 , 19 ); supranal plate trapezoidal with posterior margin slightly acuminate ( Fig. 8 ); subgenital plate with rounded apex and notched in the median portion ( Fig. 9 ). Phallic sclerites ( Figs 20–25 ): rami at lateral view slightly curved, dilated posteriorly and acuminate anteriorly ( Fig. 22 , R), connected to pseudepiphallus by membranes; pseudepiphallic arms converging anteriorly, curved inwards to form a weakly sclerotized arch ( Figs 20, 22 , Ps.M. Pr ); pseudepiphallic posterior arms claviform, apex acuminate with bristles ( Fig. 20 , Ps.A); ectophallic sclerite H-shaped ( Fig. 21 ), with apex of the ectophallic apodeme (Ec.Ap) slightly acuminate and weakly sclerotized, apex of the posterior projections dilated and connected to the pseudepiphallic paramere 1 ( Figs 20–25 , PsP1); pseudepiphallic paramere 1 well developed and connected to pseudepiphallic paramere 2 (PsP2) small and less sclerotized than PsP1, both forming a lenticular structure ( Figs 22–25 ); ectophallic arch dilated, as long as wide ( Fig. 21 , Ec.Ar); endophallic sclerite, forming a medio-dorsal crest ( Fig. 21 , End.Sc), connected to the U-shaped ectophallic fold ( Fig. 21 , Ec.F). Measurements (mm/mm2): body length, 7.46; pronotum length, 1.21; pronotum width, 1.5; head width, 1.41; interocular distance, 0.8; femur III length, 4; tibia III length, 3.66; auditorium tympanum area, 0.01; supranal plate length, 1.01; supranal plate width, 1.12; subgenital plate length, 0.66; subgenital plate width, 1.16.