Chrysochroa coreana, 2012

Han, Taeman, Kang, Taehwa, Jeong, Jongchel, Lee, Youngbo, Chung, Hyojung, Park, Sangwook, Lee, Seunghwan, Kim, Kigyoung & Park, Haechul, 2012, Pseudocryptic speciation of Chrysochroa fulgidissima (Coleoptera: Buprestidae) with two new species from Korea, China and Vietnam, Zoological Journal of the Linnean Society 164 (1), pp. 71-98 : 92-95

CHRYSOCHROA (CHRYSOCHROA) COREANA HAN ET PARK SP. NOV. ( FIGS 8A , 9–16A )

Holotype: 1♂, Mt. Duryun , Samsan-myeon, Haenamgun, Jeollanam-do, Korea. 22.vi.2008. H. C. Park. ( NAAS: voucher no. 2331).

Paratypes: 1♂, 2♀♀, Seockpo-ri , Jinseo-myeon, Buan-gun, Jeollabuk-do, Korea. 26.vii.2006. Y. B. LEE ( NAAS) ; 2♀♀, same locality as for holotype. 14.vii.2003. T . H. Kang ( NAAS); 1♀, ditto. 2004 (did not record collecting dates). J. C. Jeong ( SMNH) ; 2♂♂, 5♀♀, same data as for holotype ( NIBR) .

Description of holotype ( Fig. 8A ): 34.1 mm long, 10.4 mm wide. Body elliptic, stout, rather convex. Colour strongly and wholly brilliant, dorsal area bright green, with two longitudinal reddish-purple bands on pronotum and elytra, elytral bands pass between second and third costae; dorsolateral sides of elytra golden-green; ventral aspect of cupreous golden-green; eyes reddish-brown; labrum, half of mandibles, maxillary palpi, labinal palpi, and gular black; dorsal aspect of antennae bronze black from second to 11th antennomere; ventral aspect of antennae wholly bronze black; tarsi dark green. Surface wholly microreticulated.

Head ( Fig. 9A ) globular; vertex with distinct median suture with simple punctures, otherwise surface smooth; from vertex to front suture forming distinct, broad concavity with coarse, large punctures, then interval of punctures rugose, median longitudinal groove deep, narrow; semilunar fovea above antennal socket shallow (sometimes absent in several paratypes); AWE 1.21 times wider than VW; antennal socket well ridged triangularly to above; frontal depression moderately deep; frontal carina distinct; clypeus bell-shaped, triangularly emarginated; labrum deeply, triangularly emarginated medially, with dense, long pubescences along inner margin; mandibles beak-shaped in ventral view.

Antennae serrate from fourth antennomere; first longest, club-shaped, slightly bent inwards, 3.83 times longer than second, 1.21 times longer than third; second shortest, subglobular; third cylindrical, posterior margin slightly bent inwards, 3.16 times longer than second, subequal with fourth (Ant3L:4L = 19:18.5); fifth to tenth gradually narrowing and shortening; 11th elliptic, 1.32 times longer than tenth.

Pronotum ( Fig. 10A ) trapezoidal, distinctly arcuate laterally, widest at posterior margin ( PNAW: MLP: PWP = 48:55:78.8), narrower than elytra, 1.43 times as wide as long; PWP 1.64 times wider than PNAW; anterior margin slightly convexly emarginate; lateral margin weakly sinuate on posterior half, then converging from middle to anterolateral angle; posterior margin broadly lobed at middle; posterolateral angles blunt, acuminate apically; disc almost flat medially, with sparse, simple punctures; dorsolateral portion slightly declivous, with dense, large, coarse punctures; lateral carina distinct, not reaching anterior margin, almost straight to middle, then curved downward before disappearing.

Prosternum ( Fig. 12A ) convex; anterior margin carinate, 1.38 times wider than median width, narrower than hypomeron apex; pronotosternal sutures simple, distinctly sinuate medially; prosternal process trilobed, surface flat, posterior apex truncate, LEWPP: MLPP: PMWPP = 39: 16: 17.

Elytra ( Fig. 11A ) elongate pentagonal, convex, widest medially, 2.38 times as long as wide, lateral margin subparallel just before middle, then narrowly convergent to posterior apex; punctures simple, sparse anteriomedially, becoming distinct, dense towards lateral and posterior portions; apical margins with four denticles, with sutural spine prominently, sharply projected.

Legs long, exposed from femoral apex in dorsal view; pro- and mesofemora club-shaped; metafemur cylindrical, gradually slender to apex; meso- and metafemora bearing rather long brush setae from posterior base to half; protibia rather strongly recurved inwards, with small triangular expansion at posterior apex, with golden yellow short brush-like setae covering the anterior apex; mesotibia slightly recurved inwards; meta tibia straight; tarsal claws simple.

Seventh abdominal ventrite apically triangularly emarginate; ninth ventrite ( Fig. 14A ) tongue-shaped, somewhat narrowed, bright brown, but median portion dark brown, parallel-sided medially, then gradually narrowed to apex, posterior margin narrow, truncate; ninth tergite ( Fig. 13A ) deeply emarginated in a ‘U’ shape; tenth tergite ( Fig. 13A ) semi-oval, 1.25 times as wide as long.

Aedeagus ( Figs 15 , 16A ) spindle-shaped generally, slightly arcuate; median lobe cylindrical, suddenly narrowed apically, with lateral grooves to maintain inner margins of parameres, with moderately developed posterolateral projections that do not exceed inner margins of parameres in ventral view, slightly longer than parameres; parameres bluntly pointed at apex, apicolateral portion pale brown, with long setae.

Females ( Fig. 8B ). Length 29.4–40.4 mm, width 9.0– 12.1 mm, generally larger and with eyes less prominent than male; seventh ventrite rounded apically.

Distribution: Korea.

Biology: In Korea, the adults are generally active from the middle of July until late August, host plants of their larvae are dead trees of Quercus spp. (Fagaceae) , Celtis sinensis Persson (Ulmaceae) , Carpinus tschonoskii Maxim-owicz ( Betulaceae ), Carpinus laxiflora (Siebold et Zucc.) , and Blume var. longispica Uyeki (Betulaceae) (M. C. Kwon, pers. comm.).

Etymology: This new species was named Chrysochroa coreana based on the name of the country in which it was found, Korea.

Figures

Figure 8. Adults in dorsal view. A, B, Chrysochroa coreana sp. nov. from Korea, holotype (A); C, D, Chrysochroa fulgidissima from Japan; E, F, Chrysochroa pseudofulgidissima, sp. nov. from Hainan, China, holotype (E); G, H, Chrysochroa alternans from Okinawa. A, C, E, and G are males; B, D, F, and H are females. Scale bar = 10.0 mm.

Figure 9. Aspect of head. A, Chrysochroa coreana sp. nov. from Korea, holotype; B, Chrysochroa fulgidissima from Japan; C, Chrysochroa pseudofulgidissima, sp. nov. from Hainan, China, holotype; D, Chrysochroa alternans from Okinawa. Scale bar = 1.0 mm.

Figure 10. Pronotum in dorsal view. A, Chrysochroa coreana sp. nov. from Korea, holotype; B, Chrysochroa fulgidissima from Japan; C, Chrysochroa pseudofulgidissima, sp. nov. from Hainan, China, holotype; D, Chrysochroa alternans from Okinawa. Scale bar = 1.0 mm.

Figure 11. Elytra in dorsal view. A, Chrysochroa coreana sp. nov. from Korea, holotype; B, Chrysochroa fulgidissima from Japan; C, Chrysochroa pseudofulgidissima, sp. nov. from Hainan, China, holotype; D, Chrysochroa alternans from Okinawa. Scale bar = 10.0 mm.

Figure 12. Prosternum in dorsal view. A, Chrysochroa coreana sp. nov. from Korea, holotype; B, Chrysochroa fulgidissima from Japan; C, Chrysochroa pseudofulgidissima, sp. nov. from Hainan, China, holotype; D, Chrysochroa alternans from Okinawa. Scale bar = 5.0 mm.

Figure 13. Ninth and tenth tergites of the male in dorsal view. A, Chrysochroa coreana sp. nov. from Korea, holotype; B, Chrysochroa fulgidissima from Japan; C, Chrysochroa pseudofulgidissima, sp. nov. from Hainan, China, holotype; D, Chrysochroa alternans from Okinawa. Scale bar = 2.0 mm.

Figure 14. Ninth ventrite of the male in ventral view. A, Chrysochroa coreana sp. nov. from Korea, holotype; B, Chrysochroa fulgidissima from Japan; C, Chrysochroa pseudofulgidissima, sp. nov. from Hainan, China, holotype; D, Chrysochroa alternans from Okinawa. Scale bar = 2.0 mm.

Figure 15. Aedeagus in dorsal view. A, Chrysochroa coreana sp. nov. from Korea, holotype (voucher no. 2331); B, Chrysochroa fulgidissima from Japan (voucher no. 2048); C, Chrysochroa pseudofulgidissima, sp. nov. from Hainan, China, holotype (voucher no. 2410); D, Chrysochroa alternans from Okinawa (voucher no. 2495). Scale bar = 5.0 mm.

Figure 16. Apical aspect of the aedeagus in dorsal view. A, Chrysochroa coreana sp. nov. from Korea, holotype (voucher no. 2331); B, Chrysochroa fulgidissima from Japan (voucher no. 2048); C, Chrysochroa pseudofulgidissima, sp. nov. from Hainan, China, holotype (voucher no. 2410); D, Chrysochroa alternans from Okinawa (voucher no. 2495). Scale bar = 1.0 mm.