Subtilodecma bilobata 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 : 4-6

Subtilodecma bilobata Gorochov , sp. n.

https://zoobank.org/NomenclaturalActs/ 1FB21498-4505-4A8C-8EA3-78F0A5A140AA

Figs 8–13

MATERIAL. Holotype – ♂, Malaysia: Sabah State, Borneo I., Southern part of Kinabalu National Park , 1500–2000 m, primary forest, on leaves of bushes at night, 26.IV–1. V .2013, A. Gorochov, M. Berezin, V . Gorochova, E. Tkatsheva ( ZIN). Paratypes: 2 ♂, same data as for holotype ( ZIN) .

DESCRIPTION. Male (holotype). Coloration and structure of body similar to those of S. unilobata sp. n. but with following differences: upper tubercle of rostrum almost conical

( Figs 8, 9 ); spine of fore tibia about 0.15 mm in length; tegmina reaching posterior part of fifth abdominal tergite, with exposed part of stridulatory apparatus almost equal to more distal tegminal part in length ( Fig. 9 ); cercus somewhat arcuate (i.e. slightly curved medially),

with distal portion slightly narrower before apical widening which almost round in profile body without posterior part: from side (1, 8); from above and additionally without right or left legs (2, 9). Male abdominal apex from above (3, 10), from below (4, 11) and from side

(5, 12); apical part of left male cercus from side and slightly behind (13). Female genital plate from below (6); ovipositor from side (7).

but compressed laterally and divided into two lobules by deep and narrow notch ( Figs 10, 12,

13); genital plate with proximal portion almost four times as wide as distal portion, with lateral sides of this distal portion barely higher than in S. unilobata sp. n. but having very narrow dorsolateral borders curved downwards/laterally, and with apical part clearly but not strongly narrower than other parts of above-mentioned distal portion ( Figs 10–12 ).

Variations. Two other males with spine of fore coxa about 0.1 mm in length or almost without it, with tegmina reaching sixth or seventh abdominal tergites (but their abdomen somewhat deformed), and with exposed part of tegminal stridulatory apparatus insignificantly shorter than more distal tegminal part.

Female unknown.

MEASUREMENTS. Length (in mm). Body 7.5–8.5; pronotum 2.9–3.1; visible parts of tegmina 3–3.3; hind femora 8.8–9.2.

COMPARISON. The new species is distinguished from S. unilobata sp. n. in the distal parts of the male tegmina (located behind the tegminal stridulatory apparatus) somewhat shorter, the male cerci bilobate but not unilobate apically, the distal portion of the male genital plate narrower, and the difference between the latter portion and the apical part of this portion in width less significant.

ETYMOLOGY. The new species name is the Latin word “bilobata” (bilobate, with two lobes) due to the shape of the male cercal apex.

Figures

Figs 1–13. Subtilodecma gen. n.: 1–7 – S. unilobata sp. n.; 8–13 – S. bilobata sp. n. Male