Stenothemus kuatunensis Wittmer, 1979

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 : 141-142

Stenothemus kuatunensis Wittmer, 1979

Fig. 5D‒F

Stenothemus kuatunensis Wittmer, 1979: 330 , fig. 2.

Material examined

Holotype

CHINA • ♂; [p] “KUATUN, FUKIEN // China, 26.9.(19)46// (TSCHUNG SEN.)”, [h] “ Stenothemus // kuatunensis //Wittm.”, [p] “Naturhistorisches// Museum Basel // Coll. W. Wittmer ”, [p]“ CANTHARIDAE // CANTH00002946”; NHMB.

Other material

CHINA – Anhui • 2 ♂♂; Fengyangshan, Miaopudi ; 1430 m a.s.l.; 24 Aug. 2007; S.L. Liu leg.; IZAS . – Zhejiang • 1 ♂; Qingyuan, Baishanzu ; 1500 m a.s.l.; 9 Sep. 1993; H. Wu leg.; IZAS .

Supplementary description

AEDEAGUS ( Fig. 5D‒F ). Strongly swollen dorsally in basal part, contracted in diameter basally; basal piece obviously shorter than dorsal plate of each paramere, with a large, bifurcate conjoint middle nodule at base of ventral side; ventral process of each paramere nearly parallel to one another, long and flattened, apex rounded; dorsal plate slightly shorter than ventral process, nearly parallel-sided, layered in middle, external layer roundly emarginate in middle, internal layer feebly emarginate, apex subrounded; apical parts of laterophyses compressed and next to each other in middle, apex rounded and obviously exceeding middle emargination between dorsal plates.

Remarks

In the original publication ( Wittmer 1979), the aedeagus of this species was illustrated only in ventral view; here, it is also illustrated in dorsal and lateral views.

Distribution

China (Anhui, Fujian, Zhejiang).

Key to the species of Stenothemus from Southeast China

1. Elytra red, with moderately indicated longitudinal costae on disc...................................................... ............................................................................................ S. chinensis ( Wittmer, 1982) comb. nov.

– Elytra black, yellow or light brown, with weakly or hardly indicated longitudinal costae on disc... 2

2. Pronotum subrounded, with lateral margins obviously sinuate, posterior angles distinctly protruding .......................................................................................................................................... 3

– Pronotum subquadrate, with lateral margins nearly parallel or feebly sinuate, posterior angles hardly protruding .......................................................................................................................................... 5

3. Elytra light brown, with irregular dark markings; aedeagus: dorsal plate of each paramere rounded at apex, layered but without protuberance at inner margin................... S.kuatunensis Wittmer, 1979

– Elytra yellow or black, without markings; aedeagus: dorsal plate of each paramere acute at apex, not layered, with a wide triangular protuberance at inner margin ........................................................... 4

4. Elytra uniformly yellow...................................................... S. biimpressiceps ( Pic, 1930) comb. nov.

– Elytra black, with light yellow margins................................................ S. fukienensis Wittmer, 1974

5. Antennae extending beyond elytral apices, antennomeres III‒XI obviously widened and flattened in male..................................................................................... S. longicornis Y. Yang & H. Liu sp. nov.

– Antennae unlike above, at most reaching apical one-third length of elytra ...................................... 6

6. Elytra yellow, black at apices; aedeagus: basal piece with a triangular protuberance but without middle nodule on ventral side, laterophyses hooked at apices ........ S. nigriceps ( Wittmer, 1955) comb. nov.

– Elytra unlike above, without apical macula; aedeagus: basal piece with a middle nodule on ventral side, laterophyses acute, never hooked.............................................................................................. 7

7. Elytra black, at most light brown at margins; antennae with smooth longitudinal grooves on antennomeres III‒XI in male ............................. S. limbatipennis (Pic, 1926) stat. rev. et comb. nov.

– Elytra yellow or light brown, at most with brown markings; antennae without smooth longitudinal grooves on antennomeres III‒XI in male ..........................................................................................8

8. Elytra uniformly yellow; aedeagus: dorsal plate of each paramere abruptly narrowed in middle ...... ................................................................................................... S. flavus Y. Yang & X. Yang sp. nov.

– Elytra light brown, with brown markings; aedeagus: dorsal plate of each paramere nearly parallelsided.................................................................................... S. pallicolor ( Wittmer, 1951) comb. nov.

Figures

Fig. 5. Aedeagus (A, D, G = ventral view; B, E, H = dorsal view; C, F, I = lateral view). A‒C. Stenothemus fukienensis Wittmer, 1974 (IZAS, IOZ(E)1659634). D‒F. S. kuatunensis Wittmer, 1979 (IZAS). G‒I. S. chinensis (Wittmer, 1982) comb. nov. (IZAS, IOZ(E)1436585). Scale bars: 1.0 mm.