Stenothemus limbatipennis (Pic, 1926) Yang & Yang & Liu, 2021

Yang, Yuxia, Ge, Shujuan, Yang, Xingke & Liu, Haoyu, 2021, Review of the species of Stenothemus from Southeast China (Coleoptera, Cantharidae), European Journal of Taxonomy 744, pp. 119-144 : 127-129

Stenothemus limbatipennis (Pic, 1926) stat. rev. et comb. nov.

Figs 1C , 2C , 3G‒I , 6C , 8C

Podabrus limbatipennis Pic, 1926: 235 .

Lycocerus limatus Kazantsev, 2007: 54 (replacement name for Lycocerus limbatipennis (Pic, 1926) , preoccupied by Pic, 1906). Syn. nov.

Pseudoabsidia limbatipenni s – Wittmer 1969: 129.

Athemellus limbatipennis – Wittmer 1972: 124.

Lycocerus limbatipennis – Kazantsev & Brancucci 2007: 251.

Material examined

Determined material

CHINA – Fujian • 1 ♂; [p] “ Kuatun (2300m) 27, 40n. Br. // 117. 40ö. L. J. Klapperich // 8. 5. 1938 (Fukien)”, [h] “ Podabrus // limbatipennis // Pic”, [h] “odus. semifumatus. frm.”, [h-p] “ A. // limbatipennis // (Pic).// det. W. Wittmer ”; NHMB • 1 ♂; “ Kuatun , 1946.V.2, leg, Tschung Sen ”; NHMB • 1 ♀; Kuatun ; 12 May 1946; Tschung Sen leg.; NHMB • 2 ♂♂; Shaowu, Tachulan ; 6 May 1943; T.C. Maa leg.; NHMB .

Other material

CHINA – Fujian • 1 ♀; Chong’an, Xingcun, Guadun 8400‒ 1160 m a.s.l.; 11 Apr. 1960; Y.R. Zhang leg.; IZAS • 1 ♀; Jianyang, Huangkeng, Aotou ; 700‒950 m a.s.l.; 23 Apr. 1960; F.J. Pu leg.; IZAS • 1 ♂; same locality as for preceding; 800‒1050 m a.s.l.; 26 Apr. 1960; Y.R. Zhang leg.; IZAS • 1 ♂; same locality as for preceding; 800‒950 m a.s.l.; 29 Apr. 1960; Y.R. Zhang leg.; IZAS • 1 ♀; same locality as for preceding; 720‒950 m a.s.l.; 30 Apr. 1960; C.L. Ma leg.; IZAS • 1 ♂; Wuyishan, San’gang ; 740 m a.s.l.; Y.Y. Wu leg.; IZAS . – Jiangxi • 1 ♂; Jinggangshan ; 21 Apr. 2006; Y.B. Ba leg.; MHBU . – Zhejiang • 1 ♀; Jingning, Wangdongyang ; 1069 m a.s.l.; 16 May 2017; Y.P. Niu and C. Fang leg.; MHBU • 2 ♂♂; same locality and collectors as for preceding; 1150 m a.s.l.; 17 May 2017; MHBU • 2 ♂♂, 4 ♀♀; same locality and collectors as for preceding; 970 m a.s.l.; 18 May 2017; MHBU • 2 ♂♂, 3 ♀♀; Chuanghua, Qingliangfeng, Longtansi ; 14 May 2017; Y.B. Ba and H.H. Guan leg.; MHBU • 5 ♀♀; same locality as for preceding; 15‒18 May 2012; J.S. Xu and L.X. Chang leg.; MHBU • 2 ♀♀; same locality as for preceding; 20 May 2011; G.L. Xie leg.; MHBU • 1 ♂; Qingliangfeng, Tianchi ; 21‒23 May 2012; J.S. Xu and L.X. Chang leg.; MHBU • 8 ♂♂, 4 ♀♀; Lin’an, Qingliangfeng ; 16‒22 May 2012; J.S. Xu leg.; MHBU • 2 ♂♂, 1 ♀; same collection data as for preceding; G.L. Xie leg.; MHBU • 9 ♀♀; Qingliangfeng, Shunxiwu ; 15–18 May 2012; J.S. Xu and L.X. Chang leg.; MHBU • 1 ♂, 2 ♀♀; same collection data as for preceding; G.L. Xie leg.; MHBU • 1 ♂, 2 ♀♀; Qingyuan, Baishanzu ; 1557 m a.s.l.; 22 May 2017; Y.P. Niu and C. Fang leg.; MHBU • 1 ♂; same locality and collectors as for preceding; 23 May 2017; MHBU • 1 ♂; Pan’an, Dapanshan ; 970 m a.s.l.; 13 May 2017; Y.P. Niu and C. Fang leg.; MHBU • 1 ♀; same locality and collectors as for preceding; 641 m a.s.l.; 14 May 2017; MHBU • 2 ♀♀; Jingning, Dayanghu ; 1030 m a.s.l.; 19 May 2017; Y.P. Niu and C. Fang leg.; MHBU .

Redescription

MEASUREMENTS. Body length (both sexes): 5.5‒10.5 mm; width: 1.0‒ 2.2 mm.

Male ( Figs 1C , 2C )

COLORATION. Body black, clypeus, mouthparts, antennomeres I and II, prothorax, legs except tarsi, posterior margins of abdominal ventrites and the entire terminal one orange, elytra light yellow at margins. Body densely covered with short, recumbent yellow pubescence.

HEAD. Subquadrate, surface densely and finely punctate, each side with smooth rectangular impression behind antennal socket; eyes moderately protruding, head width across eyes 1.3 times as wide as pronotum; terminal maxillary palpomeres long-triangular, widest in middle; antennae filiform, extending to two-thirds length of elytra, antennomere II about twice as long as wide at apices, III about 2.5 times as long as II, IV‒XI each with smooth longitudinal impression in middle of outer edge, VI longest, XI slightly longer than X, pointed at apex.

PRONOTUM. Subquadrate, about 1.1 times as long as wide, anterior margin slightly arcuate, anterior angles obtuse, subrounded, lateral margins nearly parallel and slightly sinuate, posterior margin straight, posterior angles moderately sharp and protruding, disc strongly convex on posterolateral parts, surface lustrous, finely and densely punctate.

ELYTRA. Parallel-sided, about 3.4 times as long as humeral width, 4.8 times as long as pronotum, humeral lustrous, the rest of surface densely and finely punctuate, with hardly indicated longitudinal costae.

AEDEAGUS ( Fig. 3G‒I ). Moderately swollen laterally at basal part, shrunk apically in diameter; basal piece nearly as long as dorsal plate of each paramere, with a moderately large, bifurcate conjoint of? middle nodule at base of ventral side; ventral process of each paramere approaching to each other, short and slightly narrowed apically, bent ventrally in lateral view; dorsal plate slightly longer than ventral process, abruptly narrowed near base and bent to each other, apex acute and directing ventrally; apical part of laterophyses depressed and separated far from each other, apex acute and reaching middle emargination between dorsal plates.

Female

Similar to male, but more robust, eyes smaller, slightly protruding, antennae thinner and shorter, roughly extending to elytral mid-length, IV‒XI without smooth longitudinal impressions; pronotum slightly wider.

ABDOMINAL STERNITE VIII ( Fig. 8C ). Strongly narrowed posteriorly, latero-apical angles widely rounded, posterior margin widely and roundly emarginate in middle and feebly sinuate on both sides, behind notch with membrane which is weakly sclerotised and tapered at apex.

INTERNAL ORGAN OF REPRODUCTIVE SYSTEM ( Fig. 6C ). Vagina elongate, with median oviduct situated at ventro-apical part, diverticulum and spermathecal duct arising from apex; diverticulum relatively short, about 0.08 times body length, evenly thinned apically, slender tube-shaped and spiral; spermathecal duct moderately long but obviously shorter than diverticulum; spermatheca slender tube-shaped and spiral, obviously thinner than spermathecal duct and extremely long, much longer than diverticulum, basal part extended into a moderately long tube, where accessory gland opening. Accessory gland moderately thin and shorter than spermatheca.

Variation

Head sometimes orange at vertex, pronotum more or less darkened at anterior part or both sides, elytra light yellow at more or less parts of margins.

Remarks

The type was not located in MNHN although we tried several times; several specimens with labels written by Dr W. Wittmer with the specific name were found in NHMB. According to the previous work done by Wittmer (1969, 1972), it is speculated that he had examined the types during his working period, so the specimens determined by him are our references for the identification.

Kazantsev (2007) introduced the new name Lycocerus limatus for L. limbatipennis (Pic, 1926) (originally in Podabrus ), which was preoccupied by Lycocerus limbatipennis ( Pic, 1906) (originally in Cantharis ). Judging from the male genitalia, Podabrus limbatipennis Pic, 1926 is a member of Stenothemus , to which it is transferred here. With the change of the genus, the replacement name Lycocerus limatus Kazantsev, 2007 becomes a junior synonym of S. limbatipennis (Pic, 1926) (ICZN Article 59.4).

Distribution

China (Zhejiang, Fujian, Jiangxi).

Figures

Fig. 1. Habitus, dorsalview. A. Stenothemus biimpressiceps (Pic,1930) comb.nov., holotype, ♀ (MNHN), originally inCantharis Linnaeus, 1758. B. S. pallicolor (Wittmer, 1951) comb. nov., paratype, ♂ (NHMB, CANTH00001839), originally in PodabrinusFairmaire, 1896. C. S. limbatipennis (Pic, 1926) stat. rev. et comb. nov., ♂, specimen determined by W. Wittmer (NHMB), originally in Podabrus. D. S. nigriceps (Wittmer, 1955) comb. nov., holotype, ♂ (CAS, 7786), originally in Podabrinus. E. S. chinensis (Wittmer, 1982) comb. nov., holotype, ♀ (MNHN), originally in Athemellus. F. Leiothorax atrosanguineus Švihla, 2005 syn. nov. of S. chinensis, holotype, ♂ (NHMB, CANTH00003601).

Fig. 2. Male habitus, dorsal view. A. Stenothemus biimpressiceps (Pic, 1930) comb. nov., nontype specimen from Zhejiang (IZAS). B. S. flavus Y. Yang & X. Yang sp. nov., holotype, ♂ (IZAS, IOZ(E)1123159). C. S. limbatipennis (Pic, 1926) stat. rev. et comb. nov., non-type specimen from Zhejiang (MHBU). D. S. longicornis Y. Yang & H. Liu sp. nov., holotype, ♂ (MHBU, HBU(E)410001). Scale bars: 1.0 mm.

Fig. 3. Aedeagus (A, D, G = ventral view; B, E, H = dorsal view; C, F, I = lateral view). A‒C. Stenothemus biimpressiceps (Pic, 1930) comb. nov. (IZAS). D‒F. S. pallicolor (Wittmer, 1951) comb. nov. (IZAS). G‒I. S. limbatipennis (Pic, 1926) stat. rev. et comb. nov. (MHBU). Scale bars: 1.0 mm.

Fig. 6. Female internal reproductive system, lateral view. A. Stenothemus biimpressiceps (Pic, 1930) comb. nov. (IZAS, IOZ(E)1435863). B. S. pallicolor (Wittmer, 1951) comb. nov. (SYSU, En-076948). C. S. limbatipennis (Pic, 1926) stat. rev. et comb. nov. (MHBU). D. S. nigriceps (Wittmer, 1955) comb. nov. (MHBU). Scale bars: 0.5 mm.

Fig. 8. Female abdominal sternite VIII, ventral view. A. Stenothemus biimpressiceps (Pic, 1930) comb. nov. (IZAS, IOZ(E)1435863). B. S. pallicolor (Wittmer, 1951) comb. nov. (SYSU, En-076948). C. S. limbatipennis (Pic, 1926) stat. rev. et comb. nov. (MHBU). D. S. nigriceps (Wittmer, 1955) comb. nov. (MHBU). E. S. flavus Y. Yang & X. Yang sp. nov. (IZAS, IOZ(E)1659887). F. S. fukienensis Wittmer, 1974 (IZAS). G. S. chinensis (Wittmer, 1982) comb. nov. (MHBU). Scale bars: 1.0 mm.