Ctenoplus dorsalis, Fuller & Platia, 2006

Fuller, E. & Platia, G., 2006, A revision of the click beetle genus Ctenoplus Candèze, 1863 (Coleoptera: Elateridae, Synaptina), Zootaxa 1217 (1), pp. 1-76 : 72-74

Ctenoplus dorsalis n. sp.

Figures 13 , 30 , 43 , 48, 57, 108

Diagnosis

Large­sized Ctenoplus with red and black pronotum; the median black vitta on the pronotum is distinctive ( Fig. 43 ).

Description

Head, prosternum, meso­ and metathorax, and abdomen black; antennae, outer parts of mouthparts, legs reddish­brown; pronotum ( Fig. 43 ) with anteromedial and medial part of pronotum black; lateral and posterior margins of pronotum and hypomeron yellowish­red; elytra brownish­black; setae pale yellowish­white. Length: 11.0 mm; width: 2.5 mm.

Head, Fig. 13 . Frons conspicuously sculptured with moderately deep, coarse punctures, punctures almost contiguous throughout. Antenna ( Fig. 30 ) almost reaching apex of pronotal hind angles. Eyes small: head appearing broad between eyes, ocular index, female, 76.

Prothorax. Pronotum ( Fig. 43 ): punctures and cuticle as on head except becoming separated by about own diameters posteriorly; carina of hind angle converging on lateral pronotal carina only near apex of hind angle, otherwise subparallel to lateral carina, carina of hind angle sharp; setae semierect. Hypomeron: posterolateral angle distinctly set off from posterior margin, about as long as basal width, apex rounded but produced; posterior 1/4 glabrous; punctures small, simple, shallow, separated by about 2X own diameters. Prosternum: punctures relatively small, simple, separated by about 1/2 own diameters; prosternal spine: elongate in lateral aspect ( Fig. 57 ), lateral margin irregular, diagonally striate anterad ventral apex; ventrolateral carina rounded, divided anteriorly at level of base of protrochanter, mesal branch of carina extending to level of anterior edge of procoxae, carinae convergent posteriorly posterad base of protrochanter and meeting about halfway between procoxae and ventral apex.

Mesothorax. Scutellum convex. Mesepisternum (Fig. 48) glabrous only along posterior margin; anterior groove weakly developed, punctate, shallow; anterolateral angle with relatively large shallow depression separated from anterior groove by rounded carina. Elytra subparallel in basal 1/2, convergent in posterior 1/2, apices rounded, slightly dehiscent at sutural margin with very small tooth at sutural interval; striae moderately impressed, punctures separated by about own diameters but variable; intervals relatively densely punctured, punctures moderately deep, separated by about own diameters.

Metathorax. Metasternum without carina posterad mesocoxae; punctures moderately deep, almost contiguous; punctures of metacoxa as on metasternum except smaller.

Legs. Tarsomere 4 about as long as wide, oblique distally, ventral surface densely setose.

Abdomen. Terga moderately sclerotized, spiracles partially enclosed on terga 2–6. Ventrites relatively densely punctured, punctures small, separated by about own diameters, punctures larger, shallow, simple at anterolateral angle of ventrite 1 and apex of ventrite 5; dorsal submarginal carina of ventrite 5 broadly U­shaped. Female genitalia damaged: bursal plates subcresentic or subreniform; bursa with moderately dense spines, large patch immediately posterad concavity of bursal plates.

Material examined and range

1♀. [ CHINA:] Holotype female, “Chine Sichuan prov.; MOXI env., Gonge Mt.; 21– 24.7.1992; 3000–4000m./ Cervenka leg./ Schimmel Coll.” [ CSV]. The holotype was collected in southwestern China ( Fig. 108 ).

Etymology The species epithet refers to the distinctive dorsal colour pattern.

Figures

FIGURE 108. Distribution of Ctenoplus species.

FIGURES 11–14. Head capsule of Ctenoplus species, dorsal. 11, C. collaris Cand.; 12, C. pseudocollaris n. sp.; 13, C. dorsalis n. sp.; 14, C. divergens n. sp. Scale bar = 0.25 mm.

FIGURES 15–30. Antenna of Ctenoplus species. 15, C. javanensis Cand.; 16, C. sumatrensis n. sp.; 17, C. sanguinolentus (Cand.); 18, C. sanguinolentoides n. sp.; 19, C. nitidipennis Schwarz; 20, C. indicus n. sp.; 21, C. neosiamensis n. sp.; 22, C. siamensis n. sp.; 23, C. rufoantennatus n. sp.; 24, C. castaneus (Fleut.); 25, C. coomani Fleut.; 26, C. divergens n. sp.; 27, C. alutaceus n. sp.; 28, C. semialutaceus n. sp.; 29, C. cateianus n. sp.; 30, C. dorsalis n. sp. Scale bar = 0.5 mm.

FIGURES 31–43. Pronotal outline of Ctenoplus species, dorsal. 31, C. javanensis Cand.; 32, C. sumatrensis n. sp.; 33, C. sanguinolentoides n. sp.; 34, C. indicus n. sp.; 35, C. rufoantennatus n. sp.; 36, C. castaneus (Fleut.); 37, C. coomani Fleut.; 38, C. divergens n. sp., a: male, b: female; 39, C. alutaceus n. sp.; 40, C. semialutaceus n. sp.; 41, C. gigas n. sp.; 42, C. cateianus n. sp.; 43, C. dorsalis n. sp. Abbreviation: bf, sublateral longitudinal incision. Scale bar = 0.5 mm.

FIGURES 50–57. Prosternal spine of Ctenoplus and Silesis species. 50–57, lateral; 58, 59, ventral. 50, C. sanguinolentus (Cand.); 51, C. sanguinolentoides n. sp.; 52a, b, C. coomani Fleut.; 53, C. balli n. sp.; 54, C. gigas n. sp.; 55, C. divergens n. sp.; 56, C. alutaceus n. sp.; 57, C. dorsalis n. sp.; 58, C. brunneus Fleut.; 59, S. fulvus Fleut.; Abbreviations: da, dorsal apex; va, ventral apex. Scale bar = 0.25 mm.