Rhagonycha (s.str.) bimucronata Švihla, 2005

Xiao, Yun-Feng, Liu, Hao-Yu, Yang, Xing-Ke & Yang, Yu-Xia, 2024, Taxonomic review of the Rhagonycha flava species group (Coleoptera, Cantharidae), with descriptions of fourteen new species from China, Zootaxa 5534 (1), pp. 1-69 : 18-20

Rhagonycha (s.str.) bimucronata Švihla, 2005

( Figs 10A , 11A–C , 12A, 12C , 36 )

Rhagonycha bimucronata Švihla, 2005: 72 , figs 1–3.

Type material examined. HOLOTYPE ♂ ( NMPC), [p] “ China: Sichuan prov / Maoxian env. / 1500 m. 29.VI.2003 / lgt. S. Murzin,”, [P] “HOLOYUPUS / Rhagonycha / bimucronata sp. nov. / V. Švihla det. 2005”.

Other material examined. CHINA, Sichuan: 1♂, 2♀♀ ( MHBU), Anzihe, Baliping , 11.VIII.2016, leg. L.M. Li ; 7♂♂, 5♀♀ ( MHBU), same data as the proceding, 9.VIII.2016 ; 2♂♂, 3♀♀ ( MHBU), Wanglang Nature Reserve , 2500–2800 m, 32°57'22" N; 104°2'17" E, 31.VII.2017, leg. Z.B. Yi ; 4♂♂, 27♀♀ ( MHBU), Anzihe, Shaoyaogou , 11.VIII.2016, leg. W.Y. Zhou ; 5♀♀ ( MHBU), Liziping, Menghuo , 26.VII.2016, leg. L.M. Li ; 5♀♀ ( MHBU), Jiguanxiang, Baliping , 11.VIII.2016, leg. W.Y. Zhou.

Descriptive notes. Male ( Fig. 10A ). Aedeagus moderately swollen laterally near middle ( Fig. 11A, B ); ventral processes of parameres abruptly thinned apically near bases, rounded at apices, approaching to each other in ventral view ( Fig. 11A ), and feebly bent ventrlly in lateral view ( Fig. 11C ); conjoint dorsal plate of parameres nearly as long as ventral processes ( Fig. 11C ), with apical margin deeply and roundly emarginate in middle, lateral margins feebly diverging apically, acute at latero-apical angles ( Fig. 11B ), feebly inclined ventrally in lateral view ( Fig. 11C ); the emargination between conjoint dorsal plate and ventral process about 1/3 length of aedeagus ( Fig. 11C ).

Female. Internal organ of reproductive system ( Fig. 12A ): vagina stout and abruptly thinned at ventroapical portion into a very short and stout tube, where diverticulum and spermathecal duct arising next to each other; diverticulum short and spiral, evenly thin along the whole length; spermathecal duct extremely short; spermatheca provided with a spiral tube, progressively thinned apically and longer than diverticulum; accessory gland long, about twice longer than spermatheca.

Abdominal sternite VIII ( Fig. 12C ) moderately narrowed apically, widely rounded at latero-apical angles, and shallowly emarginate on both sides and triangularly emarginate in middle of posterior margin, with the portions between lateral and middle emarginations acute at apices and extending over apices of latero-apical angles.

Destribution ( Fig. 36 ). China (Sichuan).

Remarks. The aedeagus of this species was illustrated by Švihla (2005). Here, the female reproductive system and abdominal sternite VIII are illustrated and described for the first time.

Figures

FIGURE 11. Aedeagi of Rhagonycha species (A, D. ventral view; B, E. dorsal view; C, F. lateral view): A‒C. Rh. bimucronata Švihla, 2005; D‒F. Rh. flava (Pic, 1926). Scale bars: 1.0 mm.

FIGURE 12. Internal organ of female reproductive system (A, B) and abdominal sternites VIII, ventral view (C, D) of Rhagonycha species: A, C. Rh. bimucronata Švihla, 2005; B, D. Rh. flava (Pic, 1926). Scale bars: 1.0 mm.

FIGURE 36. Distribution map of the species similar to Rhagonycha flava in the aedeagi from southwest China.

FIGURE. 10. Male habitus of Rhagonycha species, dorsal view: A. Rh. bimucronata Švihla, 2002; B. Rh. flava (Pic, 1926). Scale bars: 2.0 mm.