Viadana (Paraviadana) ashaninka, Gorochov, 2018

Viadana (Paraviadana) ashaninka View in CoL sp. nov.

( Figs 56–60 View Figs 56–65 , 66–71 View Figs 66–77 )

Etymology. The new species is named after

“Reserva Comunal Ashaninka” where it was collected.

Type material. Holotype – male, PERU: Junin Department, Satipo Prov. , Rio Tambo Distr. , 6 km N of Pichiguia Vill., protected area “Reserva Comunal Ashaninka”, 11.358244°S, 74.0320473°W, ~ 500 m, primary forest, at light, 14–23 November 2017, A. Gorochov, G. Irisov GoogleMaps . Paratypes: 14 male, 2 females, same data as for holotype GoogleMaps .

Description. Male (holotype). Colouration yellowish with brownish and greenish tinges (light greenish in living condition), but eyes light brown in dorsal two thirds and with reddish brown longitudinal stripes on dorsal halves, dorsum of head with a pair of reddish longitudinal stripes behind eyes, wings with transparent most part of hind wings (but distal part of these wings partly yellowish) and some membranes in tegminal stridulatory apparatus ( Figs 56, 57, 59, 60 View Figs 56–65 ), and cerci with distal parts of their apical branchlets darkened (brown to dark brown; Figs 66–68 View Figs 66–77 ). Head with very narrow (almost lamellar) distal part of upper rostral tubercle ( Fig. 58 View Figs 56–65 ); pronotum with almost straight anterior edge of disc, with roundly angular posterior edge of disc and almost rounded (in transversal section) borders between disc and lateral lobes ( Fig. 57 View Figs 56–65 ); tegmina long and rather wide, with majority of Sc branches more or less perpendicular to majority of oblique branches located between radial area and anal tegminal edge ( Fig. 59 View Figs 56–65 ), and with stridulatory apparatus as in Fig. 56 View Figs 56–65 ; legs typical of this subgenus; last abdominal tergite with moderately large and rounded posteromedian notch; epiproct more or less triangular but elongate, with slight longitudinal (median) groove on dorsum, and with apical part almost spine-like; paraprocts small, roundly triangular but with almost angular apex; cerci rather long, thin, curved medially in distal third, gradually narrowing to bifurcate apex (both apical branchlets small, but outer one rather short and acute, and inner one clearly longer and distinctly S-shaped as well as almost not acute; Figs 66, 67 View Figs 66–77 ); genital plate moderately elongate, somewhat narrowing to apex, with rather deep and almost angular posteromedian notch and with a pair of rather long and angular lobules around this notch ( Fig. 68 View Figs 66–77 ); genitalia membranous but with characteristic semimembranous and almost round plate-like structure having dorsal surface distinctly concave ( Fig. 71 View Figs 66–77 ).

Variation. Some males with eyes uniformly light brown or greyish, with antennal scape and pedicel having reddish marks, and with apical parts of lobules of genital plate darkened.

Female. Colouration and external structure of body as in males, but head sometimes almost without reddish marks, tegminal stridulatory apparatus absent, last tergite with less notched posterior part, and cerci smaller and unspecialized; genital plate as in Fig. 70 View Figs 66–77 ; ovipositor gonangulum with rather large ventral concavity and small (almost tubercle-like) distal convexity almost under this concavity ( Figs 69, 70 View Figs 66–77 ); ovipositor as in Fig. 69 View Figs 66–77 .

Length (mm). Body: male 15.5–17.0, female 17.5–18.5; body with wings: male 32.0–35.0, female 35.0–37.0; pronotum: male 4.0–4.2, female 4.3–4.7; tegmina: male 25.5–27.5, female 27.0–28.5; hind femora: male 13.0–14.0, female 13.5–14.5; ovipositor 10.0–10.5.

Comparison. The new species is very similar to V. (P.) inversa ( Brunner-Wattenwyl, 1878) and may be its subspecies only, but Brunner-Wattenwyl (1878) indicated V. inversa type locality as “ Peru ”, and it is difficult to give any suitable subspecies classification at the present. From the latter species, V. ashaninka sp. nov. differs in the male cerci with more asymmetrical apical branchlets (in V. inversa , the inner apical branchlet is more acute and less S-shaped, and outer one is slightly longer than in the new species) and in the male genital plate with a clearly deeper posteromedian notch. From all the other species of the subgenus Paraviadana Piza, 1980 having each male cercus bifurcate, the new species is distinguished by this cercus (from V. styliformis Brunner-Wattenwyl, 1891 and V. intermedia Gorochov, 2015 ) or one of its branchlets (from V. cercata Gorochov, 2015 and V. napo Gorochov, 2015 ) clearly shorter, or the outer branclet of this cercus shorter than inner one (from V. altera Brunner-Wattenwyl, 1891 ). From V. (P.) septentrionalis (Piza, 1980) , the new species differs in a deeper and almost angular (not almost transversally rectangular) posteromedian notch of the male genital plate; and from V. (P.) cercata cuyabeno Gorochov, 2015 , V. (P.) intermedia atalaya Gorochov, 2015 and V. (P.) aenigma Gorochov, 2015 with unknown males, in the ventral concavity of ovipositor gonangulum larger and having small distal tubercle-like convexity almost under this concavity [from V. c. cuyabeno which has this concavity smaller (located in ventroproximal part of gonangulum) and distal convexity larger (not separated from more dorsal part of gonangulum by any concavity)], as well as in the distinctly more transverse female genital plate (from V. i. atalaya and V. aenigma ).