Stenothemus tryznai Švihla, 2004

Yang, Yuxia, Ge, Shujuan, Yang, Xingke & Liu, Haoyu, 2021, Taxonomic revision of the species of Stenothemus from Southwest China (Coleoptera, Cantharidae), with the descriptions of five new species, European Journal of Taxonomy 757 (1), pp. 1-36 : 17-20

Stenothemus tryznai Švihla, 2004

Figs 5C , 7B , 8D

Stenothemus tryznai Švihla, 2004: 197 , figs 149‒150, 213.

Material examined

Holotype

CHINA • ♂; [p] “China: Sichuan 28.6‒ // Jiulonggou env. 2.7. // Z. Jindra lgt., 1995”, “HOLOTYPUS // Stenothemus // tryznai sp. n. // V. Švihla det. 2003”; NMPC.

Additional material

CHINA ‒ Sichuan • 1 ♂, 1 ♀; Emei Shan, Jiulaodong ; 1800‒1900 m a.s.l.; 28 Jul. 1957; K.R. Huang leg.; IZAS • 2 ♂♂, 1 ♀; same collection data as for preceding; Y.C. Lu leg.; IZAS • 3 ♀♀; same collection data as for preceding; 27 Jul. 1957; K.R. Huang leg.; IZAS • 1 ♀; same collection data as for preceding; 22 Jul. 1957; K.R. Huang leg.; IZAS • 2 ♂♂, 1 ♀; same collection data as for preceding; 6 Jul. 1957; F.X. Zhu leg.; IZAS • 1 ♀; same collection data as for preceding; 2 Aug. 1957; Y.C. Lu leg.; IZAS • 1 ♀; Emei Shan, Qingyin’ge ; 800‒1000 m a.s.l.; 13 Jun. 1957; Y.C. Lu leg.; IZAS • 1 ♂; Baoxing, Kyaʼgyu Shan ; 2400 m a.s.l.; 30 Jul. 2016; L.M. Li leg.; MHBU .

Descriptive notes

Body length (both sexes): 8.0‒ 11.5 mm; width: 2.0‒ 2.7 mm.

Female

ABDOMINAL STERNITE VIII ( Fig. 7B ). Strongly narrowed posteriorly, lateroapical angles widely triangular, posterior margin shallowly and roundly emarginate in middle and feebly emarginate on both sides.

INTERNAL ORGAN OF REPRODUCTIVE SYSTEM ( Fig. 8D ). Vagina elongate, with median oviduct situated at ventroapical part, vagina abruptly narrowed in apical part and extended into a short duct which diverticulum and spermathecal duct are arising from; diverticulum relatively short, about 0.32 times adult body length, evenly thinned apically, slender tube-shaped and spiral; spermathecal duct much shorter than diverticulum; spermatheca slender tube-shaped and spiral, obviously thinner than spermathecal duct and nearly as long as diverticulum, with basal part extended into a slightly long tube, at opening of accessory gland. Accessory gland thin and much longer than spermatheca.

Distribution

China (Sichuan).

Remarks

The female reproductive system of this species is illustrated and described for the first time.

Figures

Fig. 5. Habitus, dorsalview.A. Stenothemus jindraiŠvihla, 2004, holotype, ♂ (NMPC).B. S. minutissimus (Pic, 1933) comb. nov., holotype, ♂ (MNHN). C. S. tryznai Švihla, 2004, holotype, ♂ (NMPC). D. S. singularicollis (Pic, 1933) comb. nov., holotype, ♀ (NHMH). E. S. melleus Švihla, 2005 syn. nov., holotype, ♂ (= S. singularicollis) (NMPC). Scale bars = 1.0 mm.

Fig. 7. Abdominal sternite VIII of female, ventral view. A. Stenothemus minutissimus (Pic, 1933) comb. nov. (IZAS, Sichuan). B. S. tryznai Švihla, 2004 (IZAS, Sichuan). C. S. singularicollis (Pic, 1933) comb. nov. (MHBU, Shaanxi). D. S. gracilis Y. Yang & X. Yang sp. nov., paratype (IZAS IOZ(E) 225787). E. S. flavicollis Y. Yang & S. Ge sp. nov., paratype (MHBU HBU(E) 410039). F. S. laticornis Y. Yang & H. Liu sp. nov., paratype (MHBU HBU(E) 410047). Scale bars = 1.0 mm.

Fig. 8. Female reproductive system, ventral view. A. Stenothemus grahami Wittmer, 1974 (IZAS, Gansu). B. S. jindrai Švihla, 2004 (IZAS, Sichuan). C. S. minutissimus (Pic, 1933) comb. nov. (IZAS, Sichuan). D. S. tryznai Švihla, 2004 (IZAS, Sichuan). Abbreviations: see Material and methods. Scale bars = 0.5 mm.