Separatula symmetrica Gorochov, 2025

Separatula symmetrica Gorochov View in CoL sp. nov.

( Figs 183–189 View Figs 183–198 )

Etymology. This species name is the Latin word “symmetrica ” (symmetrical) due to symmetrical upper processes of the male cerci.

Material. Holotype – male, PERU: northwestern part of Cusco Department, environs of Miaria Vill. on Urubamba River , 11.33502 º S, 72.99284 º W, primary forest, at light, 8–11 October 2021, A. Gorochov ( ZIN). GoogleMaps

Description. Male (holotype). Body very similar to that of S. falcata (Giglio-Tos, 1898) and S. wilsoni (Cadena-Castañeda, 2015) but with some characteristic features. Coloration very light grey (almost whitish) with dark brown most part of upper rostral tubercle, greyish brown most part of head dorsum (except for latter tubercle) and of pronotal disc as well as two small spots on each tegmen (at base of dorsal field and in proximal part of M-CuA area), dark rose spot around median ocellus and dots on rest of epicranium, rose stripes along lateral edges of pterothoracic sternites and numerous dots on lateral parts of body segments as well as on abdominal dorsum (excluding last tergite) and on all coxae, brown small spots on fore femur and fore tibia, brownish rose analogous spots on all other femora and tibiae, brown to light brown marks on all tarsi, light brown last tergite (with whitish median membranous area and membranes between this tergite and yellowish epiproct) and poorly distinct small spots on antennal flagellum, brown to dark brown bases and apical parts of upper cercal processes as well as distal parts of lower cercal processes ( Figs 183–189 View Figs 183–198 ), and transparent majority of membranes in hind wings. Upper rostral tubercle with roundly angular apical denticle having longitudinal median groove, and with distinctly narrowed subapical part (in profile, this tubercle also with distinct but small subapical notch dorsally); lower rostral tubercle somewhat wider than previous one, flattened anteriorly, with apex reaching anteroventral surface of apical part of upper rostral tubercle, and with median ocellus at base. Other structures of body (except for abdominal ones) almost indistinguishable from those of S. falcata but with barely shorter mirrors in stridulatory apparatus of tegmina ( Fig. 183 View Figs 183–198 ). Abdomen with last tergite having moderately long and rather wide (slightly transverse) as well as almost oval membranous area that in contact with membrane between this tergite and epiproct ( Figs 186, 187, 189 View Figs 183–198 ), with upper cercal processes symmetrical and having distal parts narrowly acute as well as slightly curved medially, with lower cercal processes almost equal to upper ones in length and arcuate in dorsal view as well as vertically flattened (and widened) before slightly hooked and acute apical parts, with genital plate having a pair of long and thin posterolateral lobules ( Figs 184–189 View Figs 183–198 ), and with membranous genitalia.

Female unknown.

Length in mm. Body 11.3; body with wings 29; pronotum 2.8; tegmina 21; hind femora 15.2.

Comparison. The new species is clearly distinguished from S. falcata and S. wilsoni by the male last tergite with the membranous median area distinctly longer and narrower (compare Figs 187 and 190 View Figs 183–198 ), the upper processes of the male cerci symmetrical and with their distal parts curved medially (but in S. falcata and S. wilsoni , the distal parts of these processes are differently directed: in left cercus, similarly or partly upwards; in right one, slightly downwards), the lower processes of these cerci arcuate in the dorsal view as well as vertically flattened and widened before their apical parts (vs: these processes are slightly S-shaped in the dorsal view and almost cylindrical, i.e., without any flattened widening; see Figs 184–189 and 190–192 View Figs 183–198 ), and the male genital plate with a pair of long and thin posterolateral lobules (vs: these lobules are short and less thin; see Figs 188 and 191, 195 View Figs 183–198 ). From S. adunca Gorochov, 2018 , the new species differs in the presence of a rath- er long upper process on the male cercus, and from S. araguaiensis Fianco, 2021 , in the same character as well as in the absence of any processes on the male tenth abdominal tergite (the belonging of the latter species to Separatula is problematic).