Separatula, 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 : 434

Genus Separatula gen. nov.

Type species: Separatula adunca sp. nov., designated here.

Etymology. Name of this genus originates from the Latin word “separatus” (separate) in connection with its clear differences from the other Anaulacomerina genera.

Diagnosis. Body small. Upper rostral tubercle of head narrow but barely widened in apical part ( Figs 173, 174, 179, 180 ), distinctly shorter than in Rostellula gen. nov. (apex of this tubercle slightly not reaching anterior surface of lower rostral tubercle but in contact with apex of latter tubercle), with small dorsoapical inflation in profile ( Figs 174, 175, 180, 181 ) and longitudinal (median) groove on dorsum (this groove similar to that of above-mentioned genus); lower rostral tubercle clearly wider than upper one ( Figs 173, 179 ), anteriorly flattened ( Figs 174, 175, 180, 181 ). Pronotum with disc similar to that of Rostellula gen. nov. ( Figs 174, 180 ), but its lateral lobes approximately as long as high, with somewhat concave anterior edges and almost round ventral, posteroventral and posterior parts, and with rather deep and narrow (angular) humeral notches ( Figs 175, 181 ). Wings long; hind wings distinctly protruding beyond tegminal apices; tegmina narrow, with almost parallel costal and anal edges, with two distal branches on RA, with normal RS having two branches in distal half, and with male stridulatory apparatus typical of Anaulacomerina (Figs 109, 177, 178, 182). Legs also similar to those of Rostellula gen. nov. but with a few small denticles on inner ventral keel of fore femur and with clearly widened (thickened) proximal half of hind femur. Last tergite almost as nearest abdominal tergites in size, with truncate hind part having almost straight or barely concave posterior edge; male epiproct elongate but narrow, having rounded apex and dorsomedian longitudinal groove, located between cercal bases, directed downwards, and clearly separated from last tergite by distinct membranous area (this area light and situated also between this tergite and cercal bases; Figs 183, 185, 189, 191 ); male paraprocts very small and almost finger-like, located near apex of epiproct; male cercus moderately short, having dorsoproximal part inflated and almost articulated with rest part (this dorsoproximal part strongly darkened and sometimes with large process), and latter part with distal portion acute and curved more or less upwards and medially ( Figs 183–185, 189–191 ); male genital plate short, distinctly or slightly narrowed in apical part as well as with wide and shallow posteromedian notch and thin or small lobules around it ( Figs 184, 185, 190, 191 ); female genital plate also short and with almost truncate posterior part having more or less small posteromedian notch and membranous lobule behind this notch ( Figs 187, 193 ). Male genitalia membranous but characteristic in shape: with a pair of large distal lobes widely truncated at apex, and with smaller and narrow median lobule ( Figs 186, 192 ). Ovipositor short and rather high, curved upwards, and with very small denticles along dorsal and ventral edges only ( Figs 188, 194 ).

Included species. Type species; Anaulacomera falcata Giglio-Tos, 1898 ; A. wilsoni Cadena-Castañeda, 2015 .

Comparison. The new genus is most similar to the genus Phaneropteroides in the characteristic shape of its rostral tubercles, but it is clearly distinguished from the latter genus by the male last abdominal tergite lacking any large posterodorsal lobe protruding beyond cercal bases, and male cerci much shorter and stronger. Separatula gen. nov. is also in accordance to the “Grupo Falcata” included in the genus Anaulacomera by Cadena-Castañeda (2015b), but the new genus distinctly differs from majority of Anaulacomera congeners as well as from all the other genera of Anaulacomerina in the following combination of characters: lower tubercle is clearly wider than upper one (vs. lower tubercle is not wider than upper tubercle); male has a characteristic membranous area between last tergite and epiproct as well as between this tergite and cercal bases; male cercus is with an inflated dorsoproximal part which is almost articulated with rest of cercus; male and female genital plates are short; female genital plate has almost truncate posterior part and unpaired membranous lobule located behind this part.

Figures

Figs 173–182. Separatula gen. nov., male: 173–178 – S. adunca sp. nov.; 179–182 – S. falcata (Giglio Tos). Head in front (173, 179); head with pronotum and most part of fore leg from above (174, 180) and from side (175, 181); distal part of hind wing (176); left tegmen (177); stridulatory apparatus of right tegmen (178, 182).

Figs 183–194. Separatula gen. nov.: 183–188 – S. adunca sp. nov.; 189–194 – S. falcata (Giglio Tos). Male abdominal apex from above and slightly behind (183, 189), from below (184, 190) and from side (185, 191); male genitalia from above (186, 192); female genital plate from below (187, 193); female abdominal apex with ovipositor from side (188, 194).