Rostellula minutissima, Gorochov, 2018

Gorochov, A. V., 2018, Systematics of the American Katydids (Orthoptera: Tettigoniidae). Communication 8, Proceedings of the Zoological Institute of the Russian Academy of Sciences 322 (4), pp. 398-456 : 432

Rostellula minutissima sp. nov.

(Figs 112, 165–172)

Etymology. The name of this species is the Latin word “minutissima ” (very small, smallest) in connection with its body size.

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.

Description. Male (holotype). Body very small and slender. Colouration yellowish with greenish tinge on tegmina (colouration completely greenish in living condition) and following marks: head with three whitish longitudinal lines on dorsum (median line and a pair of lines behind eyes), two pairs of greyish rose narrow longitudinal stripes between these lines and on lateral surfaces of head along (under) lateral whitish lines, and light brown lateral borders of dorsum of upper rostral tubercle; pronotum with numerous rose dots; tegmina with light brown stripe along anal edge of most part of lateral field as well as with three brown spots and some semimembranous areas in dorsal field (but right tegmen having two distal spots of them poorly visible, i. e. almost indistinct); hind wings transparent; cercal apices somewhat darkened ( Figs 165–172 ). Upper rostral tubercle very narrow (scape almost three times as wide as distal part of this tubercle), slightly not reaching apices of scapes ( Fig. 166 ); pronotum narrow and low, clearly elongate in profile, with oblique anterior edges of lateral lobes, with insignificantly oblique ventral edges, with roundly angular posteroventral corners as well as with shallow and rather widely rounded humeral notches ( Fig. 165 ); tegmina with single RS having its basal part almost lost, with additional longitudinal vein running from proximal part of median area to RS and after small interval along median line of interradial area, and with mirror moderately long (Figs 112, 167, 168); hind wing as in Fig. 169 ; last tergite somewhat longer than previous abdominal tergites and with slightly concave posterior edge; epiproct narrowly elongate and with rounded apex, directed downwards; cercus with moderately large medial tooth which shorter than lateral cercal branch and having almost spinule-like apical part ( Figs 170–172 ); genital plate almost square but with rather large angular posteromedian notch ( Fig. 170 ).

Female unknown.

Length (mm). Body 10.0; body with wings 22.5; pronotum 2.8; tegmina 19.5; hind femora 11.5.

Figures

Figs 156–172. Rostellula gen. nov., male: 156–164 – R. santacruzi sp. nov.; 165–172 – R. minutissima sp. nov. Head with pronotum from side (156, 165); rostral region of head from side (157, 166); stridulatory apparatus of right tegmen (158, 167); left tegmen (159, 168); distal part of hind wing (160, 169); abdominal apex from below (161, 170), from above (162, 171), from side and slightly behind (163), and from side (172); genitalia from above (164).