Bioacoustics of Oxyprorella hetairomima

Description. Male ( holotype ). Body colouration more or less uniformly yellowish (greenish in living condition), but: epicranium with almost whitish median ocellus and upper rostral tubercle as well as large area extending from this tubercle to posterior edge of epicranial dorsum ( Fig. 37 ); eyes with several reddish vertical lines; rest of epicranium with area under median ocellus and antennal cavities (as well as under medial parts of eyes) having numerous brown dots and a few light brown areas between these dots; antennal flagellum with very sparse and small dark brown spots; mouthparts with reddish tinge, small brown spots on upper part of clypeus and at apices of all palpi, and light brown apical part of labrum; pronotum with yellow (yellowish green in living condition) disc having dark brown borders along lateral and posterior edges ( Fig. 37 ), and with somewhat wider (than these borders) light brown stripe on each lateral lobe along its dorsal edge; tegmina uniformly yellowish with greenish tinge, a few brownish marks along middle part of costal edge and along most part of anal edge, 2–3 small brownish spots on each dorsal field, and almost transparent areas in these fields and in proximal half of costal area ( Figs 37, 38 ); hind wings transparent with yellowish distal area having a few small brownish marks along costal edge and greyish brown small apical spot ( Fig. 39 ); legs with characteristic brown to light brown oblique stripes on both sides of fore femur ( Fig. 37 ), dark brown area around outer tympanum, narrower and interrupted brown ring around inner tympanum, a few light brown marks on rest of fore tibia and on middle tibia, brown distomedial/distodorsal area on hind tibia, and small brown marks on all tarsi; rest of body with very sparse reddish dots on pleurites, abdominal tergites and sternites, and genital plate, with reddish transverse stripes on abdominal dorsum and longitudinal ones on epiproct, with dark brown apical part of epiproct and nearest parts of paraprocts as well as most part of each cercus (cercus also with light brown proximedial spot and longitudinal dorsal area; Figs 40–43 ). Structure of body most similar to that of Th. (O.) amazonica levis Gorochov, 2015 , but head dorsum with small but distinct additional tubercle near base of upper rostral tubercle [as in Th. (O.) andina ecuadori Gorochov, 2015 and Th. (O.) misera ( Brunner-Wattenwyl, 1878 ) ; Fig. 37 ], tegmina with less oblique distal part ( Fig. 38 ) and with stridulatory apparatus as in Fig. 37 , and pronotum with almost rounded (convex) but not slightly bilobed posterior part of disc ( Fig. 37 ); however, epiproct, genital plate and cerci almost indistinguishable from those of all known species of subgenus Oxyprorella Giglio-Tos, 1898 (see Figs 41, 42, 49–52, 54, 55 ); genitalia completely membranous. Variation. Second male with only somewhat darker (brown) inner spots of middle tibiae, a few additional small brown marks on lateral tegminal field between costal and anal rows of spots, and with barely narrower epiproct. Female . General appearance as in male, but tegminal stridulatory apparatus absent, dorsal tegminal field almost completely dark brown ( Fig. 45 ) or with yellowish to light brown venation and brown spaces between them ( Fig. 44 ), distal area of hind wing sometimes with more numerous and darker small spots, hind femur sometimes with sparse reddish dots, pleurites and abdomen sometimes almost uniformly light (epiproct and paraprocts light in all females); cerci also similar to those of males but smaller and with thinner distal parts; genital plate and ovipositor as in Figs 46, 47 . Length (mm). Body: male 12.5–15.0, female 14.0–15.5; body with wings: male 25.0–26.0; female 26.0–26.5; pronotum: male 2.3–2.5, female 2.3–2.6; tegmina: male 18.0–18.8, female 19.0–19.5; ovipositor 4.4–4.6. Comparison. The new species differs from all the other congeners in the characterstic yellowish green colouration of pronotal disc similar to that of the genus Hetaira . Additionally it is distinguished from the most similar Th. (O.) amazonica (Cadena-Castañeda, 2014) by the tegmina with less oblique distal parts and with greenish (not brownish) colouration; from Th. (O.) andina (Cadena-Castañeda, 2014) , by all the wings somewhat shorter, pronotal disc not bilobed ( vs . clearly bilobed posteriorly), and fore femora having distinct oblique brown stripes ( vs . these stripes are less distinct and almost not oblique); and from Th. (O.) misera having oblique stripes on the fore femora somewhat similar to those of both the new species and Th. (O.) amazonica (see Figs 37, 44, 45, 48, 53 ), by the wings distinctly longer, proximal halves of hind femora narrower, pronotal disc not bilobed posteriorly, and body colouration greenish (not brownish grey). It is necessary to note that in OSF, the subgenus Oxyprorella is erroneously divided into two genera [ Oxyprorella and Theiella Cadena-Castañeda, 2014 included by Gorochov (2015) in one genus and most likely belonging to the same subgenus]; its representatives have some differences in the habitus, but such common features as the same shape of copulatory structures (especially cerci) in the male abdominal apex, presence of small posteromedian appendices on the abdominal tergites, whitish rostrum and dorsum of head, as well as some other characters presented in some species from the both “genera” (the presence of one small additional median tubercle near the base of upper rostral tubercle, more or less bilobed posterior part of pronotal disc, whitish anteromedian and posteromedian marks on this disc, brown oblique stripes on the fore femora, characteristically darkened male cerci) do not allow me to divide Oxyprorella even into two subgenera.