Elbenia (Tamdaopteron) ryabovi, Gorochov, 2023

Gorochov, A. V., 2023, Taxonomy of the katydids (Orthoptera: Tettigoniidae) from East Asia and adjacent islands. Communication 16, Far Eastern Entomologist 485, pp. 7-28 : 10-12

Elbenia (Tamdaopteron) ryabovi Gorochov, sp. n.

https://zoobank.org/NomenclaturalActs/ 0068CD1E-6CAA-4224-B19F-DDC26353897A

Figs 1–3 , 13–16

MATERIAL. Holotype – ♂, Vietnam: Lao Cai Prov., Sa Pa Distr., Fan Si Pan Mt , 1400 m, V.2006, N. Orlov, S. Ryabov ( ZIN).

DESCRIPTION. Male (holotype). General appearance very similar to that of E. (T.) minor and E. (T.) major from another locality of northern part of Vietnam. Coloration uniformly greenish with large dark brown to brown spot on basal area of each dorsal tegminal field, brown cell membranes around chords in this field and along anal edge of each lateral tegminal field, light brown stridulatory vein of left tegmen, almost transparent membranous areas in stridulatory apparatus of right tegmen and somewhat darkened distal parts of all spines. Structure of tegminal stridulatory apparatus as in Figs 1–3 ; last abdominal tergite slightly narrowing to apical part having a pair of moderately thick but almost spine-like processes arcuately curved backwards/downwards as well as acute at apices (these processes separated from each other by rather wide interspace and very small posteromedian notch; Figs 13, 15, 16); epiproct small and lobule-like (almost elongately oval), directed downwards/forwards and with dorsal (posteroventral) median groove; paraprocts very small and rounded; cerci almost as long as processes of last tergite, thin, slightly and arcuately curved laterally, and with apical part acute and hooked (i.e. more strongly curved laterally; Figs 13, 16); genital plate large and rather long, with very deep postromedian notch almost reaching proximal third of this plate, and with a pair of rather long lobes around this notch which strongly but arcuately curved upwards and having two apical spines on each of these lobes (medial spine shorter and directed upwards/forwards, and lateral one longer as well as directed upwards and laterally; Figs 13–16).

Female unknown.

Length (in mm). Body 27; body with wings 50; pronotum 5.7; tegmina 41; hind femora 22.5.

COMPARISON. The new species is most similar to E. (T.) minor but clearly distinguished from the latter by the male last tergite with somewhat wider processes, and the male genital plate with each lobe having a distinctly shorter medial apical spine as well as a not lamellar distal part of the lateral apical spine (compare Figs 13–16 and 17–21). From E. (T.) major , the new species differs in spine-like (not distally widened) processes of the male last tergite and a clearly longer medial apical spine on each lobe of the male genital plate (see Figs 13–16 and 24–28). From other representatives of this subgenus, E. (T.) ryabovi sp. n. differs in the lobes of the male last tergite rather long and almost acute (but not short and not with rounded, truncated or bidenticulated apices; Figs 33–45, 51–56).

ETYMOLOGY. The new species is named after one of its collector.

Figs 13–38. Elbenia (Tamdaopteron) : 13–16 – E. (T.) ryabovi sp. n.; 17–21 – E. (T.) minor (Gor.) ; 22–28 – E. (T.) major (Gor.) ; 29–32 – E. (T.) daedala sp. n.; 33–35 – E. (T.) robinsoni Karny ; 36–38 – E. (T.) jacobsonii Karny. Male abdominal apex from above (13, 17, 24, 29, 35, 38), from below (14, 18, 25, 30, 34, 37), from side (15, 19, 26, 31, 33, 36) and from behind (16, 32); distal part of right lobe of male genital plate from behind and slightly below (20, 28); lobes of male last tergite from above and slightly behind (21, 27); female abdominal apex without most part of ovipositor from below (22), and this apex with ovipositor but without most part of upper structures from side (23). [17–28, after Gorochov (2005); 33–38, after Karny (1926a, b).]

Figures

Figs 1–12. Elbenia, male: 1–3 – E. (Tamdaopteron) ryabovi sp. n.; 4–6 – E. (T.) daedala sp. n.; 7–9 – E. (T.) subrecta sp. n.; 10–12 – E. (Elbenia) carinata sp. n. Stridulatory apparatus of left (1, 5, 7, 11) and right (2, 6, 8, 12) dorsal tegminal fields from above; teeth of stridulatory vein of left tegmen from below (3, 4, 9, 10).