Xizicus (Eoxizicus) reductus Gorochov, 2022

Gorochov, A. V., 2022, Taxonomy of the katydids (Orthoptera: Tettigoniidae) from East Asia and adjacent islands. Communication 15, Far Eastern Entomologist 459, pp. 1-26 : 10-12

Xizicus (Eoxizicus) reductus Gorochov , sp. n.

https://zoobank.org/NomenclaturalActs/ F3723DE7-B2D3-4DA1-9C97-6A35433131B8

Figs 30–35

MATERIAL. Holotype – ♂, Vietnam: Tuyen Quang Prov., Na Hang Distr., Na Hang

Protected Area near Na Hang Town, ~ 600 m, forest, 16–22. VI.2019, N. Orlov, L. Iogansen

( ZIN). Paratype – 1 ♀, same data as for holotype ( ZIN) .

DESCRIPTION. Male (holotype). General appearance (including body coloration) and structure of genitalia similar to those of X. (E.) robustocercus sp. n. and X. (E.) bothrocercus

sp. n. but with following characteristic features: a pair of longitudinal stripes on pronotal disc incisus laticercus subsp. n.; 40–45 – X. (Paraxizicus) anisyutkini sp. n. Anterior half of male body from side and slightly above (30, 36), from above (40) and from side (41). Male abdominal apex from above (31, 37, 42), from below (32, 38, 43), from side (33, 39, 44) and from behind (45). Female genital plate from below (34); ovipositor from side (35).

brown and not interrupted; spines and ventral spurs of fore and middle tibiae as well as all spines and spurs of hind tibia brown to dark brown ( Fig. 30 ); spine of fore coxa approximately

0.35 mm in length; tegmina almost reaching apical parts of hind tibiae; exposed distal parts of hind wings about 2 mm in length; last tergite with more or less straight posterior edge having a pair of very small and tubercle-like lobules located on median part of this edge near each other ( Fig. 31 ); cercus rather small for this subgenus, elongate, gradually narrowing to almost spine-like distal part and having small medial process near cercal middle; latter cercal process narrow (not wider than long), slightly depressed dorsoventrally and with two very small apical denticles (medial denticle very short and almost rounded, and lateral denticle acute and barely longer than previous one; Figs 31–33 ); genital plate moderately elongate and almost rectangular but with distal half slightly narrowing to widely truncated (barely convex) posterior edge, and with a pair of small and angular posterolateral lobules which possibly fused with very small styles ( Figs 32, 33 ).

Female. Coloration and structure of body similar to those of male, but tegmina and abdominal apex more similar to those of female of X. (E.) robustocercus sp. n., X. (E.) orlovi and X. (E.) bothrocercus sp. n. with some differences in shape of genital plate (this plate almost as in X. robustocercus sp. n. but clearly narrowing to apex, with more keel-like lateral edges between ventral and lateral surfaces, and with insignificantly less deep posteromedian notch; Fig. 34 ); ovipositor almost as in X. orlovi ( Fig. 35 ).

MEASUREMENTS. Length (in mm). Body: ♂ 11.5, ♀ 16; body with wings: ♂ 26, ♀

32; pronotum: ♂ 3.9, ♀ 4.8; tegmina: ♂ 20, ♀ 26; hind femora, ♂ 13.5 (hind legs of female missing); ovipositor 14.

COMPARISON. The new species is most similar to X. (E.) parallelus (Liu et Zhang,

2000) from China in the male cercus having only one rather narrow (shortly longitudinal)

medial process, but it is distinguished from the latter species by the posterior lobules of the male last tergite distinctly shorter, the male cerci much shorter and with their distal parts thinner and not curved medially, and the medial cercal process clearly narrower. The female genital plate of X. (E.) reductus sp. n. is similar to that of X. (E.) dao and X. (E.) duplum but with some differences: in X. dao , this plate has the lateral keels between its ventral and lateral surfaces stronger, more convex in profile and more concave in ventral view; and in X. duplum ,

this plate is shorter (clearly transverse).

ETYMOLOGY. This species name is the Latin word “reductus” (reduced, diminished)

due to the size of the male cerci which are distinctly smaller than in all other species of this subgenus.

Figures

Figs 30–45. Xizicus spp.: 30–35 – X. (Eoxizicus) reductus sp. n.; 36–39 – X. (Axizicus?)