Stenothemus shaanxiensis Švihla, 2004 (Yang & Yang & Liu, 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 : 3-6

publication ID

https://doi.org/ 10.5852/ejt.2021.757.1409

publication LSID

lsid:zoobank.org:pub:171E0461-2EFC-4E53-8FC3-D902A1AE26DA

DOI

https://doi.org/10.5281/zenodo.5033112

persistent identifier

https://treatment.plazi.org/id/03C7082F-3C49-8F14-FE2E-FA4DFCEFF961

treatment provided by

Felipe

scientific name

Stenothemus shaanxiensis Švihla, 2004
status

stat. nov.

Stenothemus shaanxiensis Švihla, 2004 stat. nov.

Figs 1B View Fig , 2A‒C View Fig , 3A View Fig , 4A View Fig

Stenothemus benesi shaanxiensis Švihla, 2004: 202 , fig. 164.

Material examined

Holotype

CHINA • ♂; [p] “China: Shaanxi 21.‒23.6. // Quing Ling Shan Mts. 1998 // rd. Baoji-Taibai , 35 km S Baoji // O. Šafránek & M. Trýzna lgt.”, “HOLOTYPUS // Stenothemus // benesi shaanxiensis ssp. n. // V. Švihla det. 2003”; NMPC.

Additional material

CHINA – Chongqing • 1 ♂; Chengkou, Dong’an, Shengjiaping ; 31.791º N, 109.241º E; 1819 m a.s.l.; 16 Jun. 2017; B. Chen leg.; CQNU GoogleMaps 1 ♂; Chengkou, Dong’an, Huang’anba Grassland ; 31.846º N, 109.199º E; 2249 m a.s.l.; 15 Jun. 2017; B. Chen leg.; CQNU GoogleMaps . – Shaanxi • 1 ♀; Zhouzhi, Houzhenzi ; 1550‒3000 m a.s.l.; 22 Jun. 1999; J. Hu leg.; IZAS 1 ♀; Zhouzhi, Houzhenzi ; 2500‒3000 m a.s.l.; 22 Jun. 1999; C.M. Liu leg.; IZAS .

Descriptive notes

Body length (both sexes): 5.5‒8.3 mm; width: 1.5‒2.6 mm.

Male ( Fig. 1B View Fig )

AEDEAGUS ( Fig. 2A‒C View Fig ). Moderately swollen dorsally at basal part, moderately reduced basally in diameter; basal piece nearly as long as dorsal plate of each paramere, with a large, bifurcate conjoined middle nodule at base of ventral side; ventral processes of parameres nearly parallel to each other, long and slightly widened apically, nearly straight in lateral view; dorsal plate nearly as long as ventral process, evenly narrowed apically and next to each other, apex rounded and folded ventrally; apical parts of laterophyses depressed and approaching each other, apex acute and directed dorsally, slightly exceeding middle emargination between dorsal plates.

Female

ABDOMINAL STERNITE VIII ( Fig. 3A View Fig ). Obliquely narrowed posteriorly, lateroapical angles obtusely rectangular, posterior margin deeply and triangularly emarginate in middle and feebly sinuate on both sides, behind the notch with a membrane which is moderately sclerotized and triangularly bilobed at apex.

INTERNAL ORGAN OF REPRODUCTIVE SYSTEM ( Fig. 4A View Fig ). Vagina stout, with median oviduct situated at ventroapical part, vagina abruptly narrowed in apical part and extended into a long duct which diverticulum and spermathecal duct are arising from; diverticulum relatively short, about 0.33 times adult body length, evenly thinned apically, slender tube-shaped and spiral; spermathecal duct much shorter than diverticulum; spermatheca slender, tube-shaped and spiral, clearly thinner than spermathecal duct and slightly shorter than diverticulum, with basal part extended into a short tube, at opening of accessory gland. Accessory gland thin in basal part and the remainder moderately thin, nearly as long as spermatheca.

Distribution

China (Shaanxi, Chongqing). New record for Chongqing.

Remarks

In the original publication ( Švihla 2004), this species was treated as a subspecies of S. benesi . However, differences between the two taxa are found not only in the external appearance, but also in the structures of the aedeagus. In S. shaanxiensis , the body is smaller and yellow ( Fig. 1B View Fig ), aedeagus ( Fig. 2A‒C View Fig ) with the dorsal plate of each paramere approaching that of the other, and the ventral process of each paramere distinctly thickened apically. In contrast, in S. benesi , the body is larger and brown ( Fig. 1A View Fig ), aedeagus ( Švihla 2004: figs 161‒163) with dorsal plates of parameres separated from each other and ventral process of each paramere slightly thickened apically. These differences are sufficient to support their independent status, so it is proposed that S. shaanxiensis is separated from S. benesi and upgraded to the specific level. The dorsal and ventral view of the aedeagus and the female reproductive system for this species are described and illustrated for the first time.

NMPC

Czech Republic, Prague, National Museum (Natural History)

IZAS

China, Beijing, Chinese Academy of Sciences, Institute of Zoology

NMPC

National Museum Prague

IZAS

Institut Zoologii Akademii Nauk Ukraini - Institute of Zoology of the Academy of Sciences of Ukraine

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Cantharidae

Genus

Stenothemus

Loc

Stenothemus shaanxiensis Švihla, 2004

Yang, Yuxia, Ge, Shujuan, Yang, Xingke & Liu, Haoyu 2021
2021
Loc

Stenothemus benesi shaanxiensis Švihla, 2004: 202

Svihla V. 2004: 202
2004
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