Xiphidiopsis (Xiphidiopsis) acuminata Jin, 2020

Jin, Xingbao, Liu, Xianwei & Wang, Hanqiang, 2020, New taxa of the tribe Meconematini from South-Pacific and Indo-Malayan Regions (Orthoptera, Tettigoniidae, Meconematinae), Zootaxa 4772 (1), pp. 1-53 : 17

23) Xiphidiopsis (Xiphidiopsis) acuminata Jin sp. n.

Holotype ♂ (left middle, right middle and hind legs lost, right tegmina and wing attached on label paper): BRITISH N. BORNEO/ Tawau, Quoin Hill / Cocos Res. Sta. / 20.IX.1962; Y. Hirashima / Malaise Trap / BISHOP

Paratype ♀ (left front, middle and right front legs lost): labeled as Holotype

Paratype ♀ (left hind, right middle and hind legs lost): labeled as Holotype

Description. General morphology typical of the genus. Pronotum with lateral plate comparatively deep; humeral sinus less distinct; tegmina and wings long, over the apex of hind tibia. Male 10 th tergite with a large posteriormedian notch, forming a single (unpaired) middle process, asymmetry, apical widened; cerci large and complicated lobe, right and left ones slightly asymmetry in detailed form ( Fig. 9 a–d), subgenital plate in triangular form, projected in middle, styli distinct ( Fig. 9c ), genitalia not dissected.

Female 9 th tergite with less enlarged lateral posterior margin; posterior margin of subgenital plate triangular form, with sharp middle process ( Fig. 9e ), ovipositor sword shape, nearly straight, length over the apex of hind femora, ventral valve smooth, apical hook less visible ( Fig. 9f ).

Measurements (mm). Body: ♂ 10.1, ♀ 11.1–11.2; Pronotum: ♂ 3.8, ♀ 3.6–3.9; Tegmina: ♂ 17.5, ♀ 18.9–19.7; Hind femora: ♂ 10.4, ♀ 11.2; Ovipositor: 9.3–9.9.

Comparison. This species is very similar to X. (X.) shcherbakovi Gorochov, 2019 from Sabah of Borneo by the triangular form of male posteriormedian process and complicated male cerci, but different of male cerci with middle branch. The female of this species is very similar to X. (X.) exigua Karny, 1926 in subgenital plate, but ovipositor is much longer.

Etymology. Species name refers to the shape of sharply projected middle part of subgenital plate both in male and female.

Discussion. The new species is very close to X. (X.) fallax Redt. 1891 , X. (X.) jambi Gorochov, 2008 , X. (X.) padangi Gorochov, 2008 ( Gorochov, 2008, figs.1–11) from Sumatra and X. (X.) mada Gorochov, 2016 from Vietnam, X. (X.) shcherbakovi Gorochov, 2019 from Borneo by the form of male 10 th tergite with unpaired middle process, complicated cerci. The differences among them are subtle. If there are more material from all the localities of Asia-Tropical, where the related species occur, it is possibly could show some morphological variations of interspecific and intraspecific related to geographical distribution.

Figures

FIGURE 9. Xiphidiopsis (Xiphidiopsis) acuminata Jin sp. n. male abdominal terminal: a. dorsal view, b., c. ventral view, d. lateral view; e. female subgenital plate; f. female in lateral.