Rhopalopsole triangulispina Mo and Li, 2025

Rhopalopsole triangulispina Mo and Li , sp. nov.

Type Material

Holotype. 1♂, CHINA: Guangxi Zhuang Autonomous Region, Guilin City , Guanyang County,

National Nature Reserve, Shagang Station, 408 m, 25°25′28″ N, 111°12′15″ E, 26 November 2024, leg.

( HIST).

Paratypes. 8♂♂, 6♀♀, same data as holotype ( HIST); 2♂♂, 4♀♀, same location as holotype, Management Station , 404 m, 25°29′55″ N, 111°14′25″ E, 25 November 2024, leg GoogleMaps . Wei-Hai Li, Xing-Yue GoogleMaps

Li Lin, Rao-Rao Mo ( HIST).

Diagnosis

Male tergum 9 possesses a rounded, elevated process. Tergum 10 is characterised by a sclerotised trapezoidal plate, featuring drop-shaped lateral bars and subtriangular transverse bars that bear long hairs. The lateral projection terminates in a downward-pointing spine. The cercus includes an apical

The epiproct curves sharply upward, forming a hook shape with a blunt tip. Subanal lobes exhibit ventral furrows. In females, sternum 7 features a subgenital plate with apical lobes and a longitudinal bar. Sternum 8 with a wavy, sclerotised transverse postgenital plate.

Description

Adult habitus ( Figure 1 View Figure 1 (a)). Head brown, wider than pronotum; compound eyes black; antennae and dark brown. Pronotum brown, rectangular, all corners obtuse and with dark brown symmetrical

Wings grey brown, with brown veins; legs brown. Abdomen and terminalia brown.

Male ( Figures 1 View Figure 1 , 2 View Figure 2 , 4 View Figure 4 (a–c)). Fore wing length 6.5–6.8 mm, hind wing length 5.5–5.8 mm (Tergum 9 moderately sclerotised, except for a large, weakly sclerotised area in the middle a small, strongly sclerotised, rounded and upraised process located at mid-posterior margin.

9 approximately as long as wide, basally with tongue–like vesicle bearing dense hairs, apically a short, blunt, triangular subgenital plate. Tergum 10 with a distinctly sclerotised subtrapezoidal central plate accompanied by a pair of drop-shaped lateral bars; transverse bars distinctly sclerotised and narrowly separated in the middle, with a cluster of long, black the lateral portion, extending to the inner side of tergum 10; lateral projection paired,

starting from a small, rectangular basal plate and ending in a downward-pointing triangular when viewed laterally. Cercus elongate and upturned, featuring a distinct apical spine.

( Figures 1 View Figure 1 (b–d), 2(d), 4(a, c)) strongly sclerotised and heavily upcurved, forming a hook shape a blunt tip, appears as a small, sharp apical spine in lateral view. Subanal lobe distinctly sclerotised the base and elongate, features a rounded membranous apex that tapers slightly; ventral well-defined.

Female ( Figures 3 View Figure 3 , 4 View Figure 4 (d)). Fore wing length 7.2–8.0 mm, hind wing length 6.2–6.9 mm (n = 4). generally similar to male. The posterior margin of sternum 7 produced into a subrectangular pigmented subgenital plate with a middle notch forming a pair of lobes; the posterior area a longitudinal dark bar. Sternum 8 features a wavy, sclerotised, transverse postgenital plate located the posterior half of the segment.

HISTORY HISTORY

Remarks

The new species is not confidently assigned to any of the currently recognised species groups genus Rhopalopsole , as it shows only partial agreement with the morphological features of the R.

group and the R. vietnamica group (western assemblage). The new species shares similarities Rhopalopsole shimentaiensis Yang, Li and Zhu, 2004 , which is found in Guangdong, particularly shape of the central plate and transverse bars of tergum 10, as well as the presence of an apical the cercus. However, the new species can be easily distinguished from the latter by the following a rounded process on tergum 9, a narrow hook-like epiproct with a blunt tip, and a lateral projection

HISTORY mid-posterior spine; the epiproct is wide and ends in a truncate tip; and the lateral projection on ends in a truncate tip.

Distribution

As of now, the newly identified species has been found exclusively in the Guangxi Zhuang

Region, China.

Key to the males of Rhopalopsole View in CoL from Guangxi, China

1. Lateral projection of tergum 10 with a long, narrow process meeting that of the opposite side midline.. ... ... ... ... ... ... ... ... ....

–. Lateral projection of tergum 10 with a short process that cannot interlock with that of the side.. ... ... ... ... ... ... ... ... ....

2. Tergum 9 with a large, semicircular, raised process located at the mid-posterior margin (see fig. 1

and Du 2012a).. ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... .... R. basinigra Yang and Yang

–. Tergum 9 with a small, rounded, raised process at the mid-posterior margin.. ... ... ... ... ... ... ...

3. Epiproct flat and rectangular (see fig. 48.1 in Sivec et al. 2008).. ... ... ... ... ... ... ... ... .... R. flata

Yang, 1995

–. Epiproct rounded and cylindrical (see fig. 72a in Yang et 2015).. ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... .... R. gutianensis Yang and Yang, 1995

4. Epiproct wide and hatchet-shaped (see fig. 11 in Li et al. 2017).. ... ... ... ... ... ... ... ... .... R. cestroidea Murányi and Gamboa, 2017

–. Epiproct narrow hook-shaped.. ... ... ... ... ... ... ... ... ....

5. Lateral projection with a truncate tip (see fig. 2d in Mo

2018).. ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... .... R. brevicula Mo, Yang, Wang and Li

–. Lateral projection with a bifurcated or sharply pointed apex.. ... ... ... ... ... ... ... ... ....

6. The lateral projection has a bifurcated apex.. ... ... ... ... ... ... ... ... ....

–. The lateral projection has a sharply pointed apex.. ... ... ... ... ... ... ... ... ....

7. Antennae lacking rings of long hairs (what does this mean?! fig. 71 in Yang 2015).. ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... .... R. furcospina (Wu,

–. Antennae with rings of long hairs (temporarily, figs. 88a–88b in Yang 2015).. ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... .... R. sinensis Yang and Yang ,

8. Tergum 9 with a rounded, upturned process located at the mid-posterior margin ( Figures 3 View Figure 3 (a)).. ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... .... R. triangulispina

–. Tergum 9 with a pair of strongly sclerotised paramedial bands.............. ... ... ... ... ... ... ..

9. Transverse bar of tergum 10 subtriangular (see figs. 3b, 4a in Mo et al. 2018)... ... ... ... ... ... ...

.. ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... .... R. jizushana Mo and Li

–. Transverse bar of tergum 10 subrectangular (see fig. 6 in Li et al. 2017)....................

.. ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... .... R. triangulis Li, Murányi and Yang