A revision of the click beetle genus Ctenoplus Candèze, 1863 (Coleoptera: Elateridae, Synaptina) Fuller, E. Platia, G. Zootaxa 2006 2006-05-26 1217 1 1 76 Fuller & Platia, 2006 Fuller & Platia 2006 [264,563,1484,1510] Insecta Elateridae Ctenoplus GBIF Animalia Coleoptera 59 60 Arthropoda species semialutaceus sp. nov.   Figures 28, 40, 45, 80, 111  Diagnosis Medium­sized, uniformly dark brown  Ctenopluswith a narrow band of alutaceous cuticle on the posterolateral margin of the hypomeron ( Fig. 45).  C. alutaceus  n. sp.also has alutaceous cuticle on the hypomeron, but  C. alutaceusis smaller than  C. semialutaceus(6.0– 6.5 mmvs. 9.0– 10.5 mm) and has a wider band of alutaceous cuticle ( Fig. 44).  DescriptionBody uniformly dark brown dorsally, ventral surface of meso­ and metathorax and abdomen variably reddish­brown to brown; antennae, legs and palpi yellowish­brown; setae opaque light yellow. Length: 9.0– 10.5 mm; width 2.0– 2.5 mm. Head. Punctures relatively large, shallow, almost contiguous throughout. Antennae ( Fig. 28) not reaching apex of pronotal hind angles by about length of antennomere 11; cuticle with dense minute punctures. Prothorax. Pronotum ( Fig. 40): lateral margin varying from subparallel to slightly sinuate; lateral carina distinctly sinuate; punctures as on head, almost contiguous throughout; carina of hind angles sharp, slightly elevated, extending anteriorly slightly more than 1/3 length of pronotum in lateral aspect; posterior margin adjacent to scutellum sinuate. Hypomeron, Fig. 45; lateral margin with narrow band of alutaceous cuticle opposite procoxa, band about 1/4 width of hypomeron at level of procoxa; punctures as on head; mesal border with linear row of 6 punctures. Prosternum: punctures about 1/2 size of hypomeral punctures, almost contiguous throughout; prosternal spine: elongate, length to posterior concavity about 2X width immediately posterad procoxae, ventrolateral carinae joining slightly anterad apex. Mesothorax. Scutellum flat, sloping slightly below level of adjacent elytra, anterior margin straight. Mesosternum posteriorly slightly raised above level of mesocoxae in lateral aspect, raised margin weakly concave, declivous beaded margin sloping at ca.45°; posterior margin straight, slightly raised above metasternum. Mesepisternum glabrous on posterior 1/2; anterolateral groove punctate and setose. Elytra elongate but not attenuated, somewhat rounded apically, apices contiguous, each with or without a very small sutural tooth; striae weakly impressed; intervals moderately densely punctured; punctures in striae and on intervals separated by about own diameters; posterior margin of epipleura truncate. Metathorax. Metasternum: carina posterad mesocoxa variable in length, up to 3X as long as basal width; punctures slightly smaller than hypomeral punctures, almost contiguous throughout. Legs. Profemur with black microspines; claws robust, apical tine only slightly larger than subapical tines; tarsomere 4 with very small lobe. Abdomen. Ventrite 5 about as long as basal width, subtriangular; dorsal submarginal carina broadly V­shaped; ventrites 1–5 closely punctured, punctures grading from subequal in size to those of metasternum laterally to about 1/2 that size along midline, almost contiguous throughout. Male genitalia, Fig. 80; parameres not enclosing median lobe ventrally, mesal margin of parameres sinuate ventrally. Female genitalia damaged; bursal plates subreniform, apparently symmetrical; tubular extension: proximal spines about same thickness and density as basal spines but shorter; distal spines larger, stouter, less dense, with large bases; other details unknown.  Material examined and range   2♂, 1♀. [ LAOS:] Holotypefemale, “ Laos, Vientiane,  30.iv.1965"/ “ Native Collector, Bishop Mus.”[ BPBM].  Paratypes. 2♂, [ THAILAND:]“THAILAND bor. CHIANGDAO  env. 21.5–  4.6.1995, Lgt. SNIZEK M.” [ CPG]. Thisspecies is known from northern Thailandand western Laos( Fig. 111), but see Discussionbelow.  Etymology The species epithet is derived from ‘semi­’ + ‘alutaceus’, referring to a small patch of alutaceous cuticle on the hypomeron.  Natural historyAdults have been collected between 30 April and 4 June.  Discussion The males and female of the typeseries were not collected at the same time or place. Given the presence of externally indistinguishable species pairs in  Ctenoplus, the association must be regarded as tentative. 1965-04-30 BPBM Laos Native Collector Laos 60 61 3 1 2 Viangchan holotype [543,1252,1843,1870] CHIANG Thailand THAILAND 60 61 2 2 paratype 1995-06-04 CPG Thailand This Discussion 61 62 1