Stenothemus fugongensis Y. Yang et X. Yang

Yang, Yuxia, Su, Junyan & Yang, Xingke, 2014, Review of the Stenothemus harmandi species-group (Coleoptera, Cantharidae), with description of six new species from China, Zootaxa 3847 (2), pp. 203-220 : 210-212

Stenothemus fugongensis Y. Yang et X. Yang , sp. nov.

Figs. 3 , 15, 24‒26, 44

Type material. Holotype ♂ ( IZAS): CHINA: Yunnan Prov.: Fugong County, Lumadeng Township, South Fork Yamu He , 1.3km E of Lao Shibali , 2250m, 27.08180°N, 98.78670°E, 2305m, 15.VIII.2005, leg. D.H. Kavanaugh, H.B. Liang & J.F. Zhang [ CASENT 8079360 ] . Paratypes: 1 ♀ ( IZAS): same data as holotype ; 1 ♂ ( CAS): Fugong, Lumadeng, Laoshibali roadside, 27.07831°N, 98.77416°E, 2305m, 15.VIII.2005, leg. H.B.Liang & J.F. Zhang .

Distribution. China (Yunnan).

Description. Male ( Fig. 3 ). Head black, reddish brown on middle line of vertex, mouthparts light yellow, more or less darkened at maxillary and labial palpi, dark brown at apices of mandibles, antennae black, light yellow at apex of each antennomere, pronotum light yellow, with a large dark brown marking on disc, scutellum light yellow, elytra light yellow and mottled with irregular dark brown markings, legs light yellow, black at apices of femora and tarsomeres and bases of coxae and tibiae, more or less darkened at outer sides of femora and outer and dorsal sides of tibiae, prosternum light yellow, meso- and metasterna and abdominal ventrites black brown, light yellow at posterior margins of abdominal ventrites and the whole terminal ventrite. Body densely covered with light yellow pubescence, mixed with slightly long, semirecumbent light yellow pubescence and erect black brown setae on elytra.

Head subquadrate, temples straight and slightly converging posteriorly, dorsum moderately convex in central part, surface semilustrous, densely and finely punctate, each side with a smooth and rectangular impression behind antennal socket; eyes strongly protruding, head width across eyes distinctly narrower than pronotum; terminal maxillary palpomeres long-triangular, widest at basal one-third, with apical parts of inner margins arcuate and sharp, acute at apices; antennae extending to basal two-thirds length of elytra, antennomeres II about twice longer than wide at apices, III about one-third longer than II, IV longest, from V to XI gradually shortened, XI pointed at apex.

Pronotum about 1.25 times as wide as long, widest nearly in middle, anterior margin together with anterior angles and lateral margins rounded, posterior margin bisinuate and narrowly bordered, posterior angles obtuse, subrounded, disc distinctly convex on posterolateral parts, surface semilustrous, finely and sparsely punctate.

Elytral length about 5 times length of pronotum, 3 times as long as humeral width, with lateral margins slightly diverging posteriorly, surface semilustrous, rugulose-lacunose and finely punctate.

Aedeagus ( Figs. 24‒26 ): ventral process of each paramere bent ventrally about 60 degrees, with the bent portion at apical part nearly as long as the basal portion, moderately thickened terminally and circular at apex in lateral view, dorsal plate slightly shorter than ventral process, evenly narrowed apically, tapered at apex; laterophyse hooked at apex.

Female. Similar to male, but head slightly convex on dorsum, antennae shorter and extending to elytral midlength, pronotum wider, about 1.30 times as wide as long, moderately convex on posterolateral parts of disc, elytra with lateral margins distinctly diverging posteriorly, abdominal sternite VIII (Fig. 15) evenly narrowed posteriorly, inverse-triangularly convex at posterior half of middle sclerotized part, with lateral margins moderately sclerotized, posterior margin roundly emarginated in middle, lateroapical angles rounded, the lobe strongly sclerotized around lateral margins, triangular and acute at apex.

Body length: 8.0‒9.0 mm; width: 2.0‒ 2.2 mm.

Diagnosis. This species is similar to S. orbiculatus Švihla in the pronotum with subrounded posterior angles, but can be easily distinguished from the latter by the aedeagus: dorsal plate of each paramere evenly narrowed apically, laterophyse hooked at apex.

Etymology. Derived from the name of its type locality, Fugong County, Yunnan Province, China.

Figures

FIGURES 1 ‒ 4. Male habitus, dorsal view: 1, 2. Stenothemus harmandi (Bourgeois, 1902) (1. Lecotype, 2. non-type from Nepal); 3. S. fugongensis sp. nov.; 4. S. distortirudis sp. nov. Scale bars: 2.0 mm.

FIGURES 24 ‒ 32. Aedeagus (24, 27, 30. ventral view; 25, 28, 31. dorsal view; 26, 29, 32. lateral view; 26 a. laterophyse, lateral view; 31 a. apex of paramere, dorsoapical view): 24 ‒ 26. Stenothemus fugongensis sp. nov.; 27 ‒ 29. S. distortirudis sp. nov.; 30 ‒ 32. S. parallelus sp. nov. Scale bars: 1.0 mm.