Coraebus businskyorum Xu & Kubáň, 2013

Xu, Hongxia, Ge, Sinqin, Kubáň, Vítězslav & Yang, Xingke, 2013, Two new species of the genus Coraebus from China (Coleoptera: Buprestidae: Agrilinae: Coraebini), Acta Entomologica Musei Nationalis Pragae 53 (2), pp. 687-696 : 688-692

Coraebus businskyorum Xu & Kubáň , sp. nov.

( Figs. 1, 2, 5, 7 , 9, 11, 13 )

‘ Coraebus obscurus Peng, 1991 ’ sensu KUBÁŇ (1997): 29 (misidentification).

Type locality. Central China, western Hubei, Shennongjia county, Yanzi pass, 31°43′N 110°28′E, 2200 m a.s.l.

Type material. HOLOTYPE: J ( NMPC): Central CHINA: Western HUBEI: ‘ CHINA, W - HUBEI, SHENNONGJIA Co., YANZI PASS, 31°43’/110°28’, 2200 m, 23.–26.6.[19] 95 L. +R.BUSINSKÝ lgt. [p]. \ Coraebus businskyorum sp. nov. J H. Xu & V. Kubáň det. 2013 [p, red label] ’. PARATYPES (5 JJ 5 ♀♀): CHINA: ‘ Mennkia tsai’, 10.iv.1920, Licent leg. (1 J, MNHN). CHONGQING: Chongqing, Jinfoshan mts., 29.vii.2003, Liu , Wang & Yuan leg. (1 J, HBUM). Western HUBEI: the same data as holotype (1 J 1 ♀, VKCP). Northern SICHUAN: Nanping , Abazhou , 33°15′N 104°15′E, 2000 m, 8.–13.vi.1990 ; Nanping, 9.–11.vi.2000, E. Kučera leg. (1 J 1 ♀, EKCS, 1 ♀ VKCP) ; Jiuzhaigou, 12.–17.vi.2000, E. Kučera leg. (1 J 1 ♀, VKCP) .

Description of the holotype ( Fig. 1 ). Elongate, cylindrical. Length 10.5 mm, width 3.2 mm. Head, pronotum and scutellum black with golden lustre. Elytra black with suture, basal and apical fifth metallic purple, remaining parts with deep blue-black metallic lustre, lateraly slightly changing to purple. Underside and legs shiny black. Head and pronotum densely covered with yellow pubescence. Scutellum asetose. Elytra with black and yellow pubescence, the latter forming ornamentation as in Fig. 1 .

Head. Vertex with distinct longitudinal median line. Frons with deep wide longitudinal median impression, each side near eyes with subacuminate tubercle. Supra-antennal grooves narrow, open at outer side; carina above supra-antennal grooves connected in middle, sinuate. Frontoclypeal keel distinct, straight, at the center of antennal grooves. Impression above frontoclypeal keel connected to supra-antennal grooves. Width of clypeus between antennal grooves slightly narrower than their diameter. Antennal grooves large with inner margin elevated and forming a keel, outer margin open obliquely downwards. Lower margin of clypeus emarginate, lateral sides expanded to a blunt tooth. Sculpture of head formed of dense and coarse punctation separated by narrow wrinkles, middle part of frontal impression and top of frontal tubercles smooth, asetose and shiny. Antennae ca 1.15 times longer than pronotal length, serrate from antennomere 4. First three antennomeres subconical, scape shorter than pedicel, antennomeres 3–11 subequal in length and shorter than pedicel.

Pronotum 1.53 times wider than long with maximum width in the middle, anterior margin strongly arcuate medially, lateral sides rounded, hind angles obtusely angulate, and hind margin sinuate, produced towards scutellum in the middle. Basal V-shaped impression connected to large oval impressions at posterior corners. Prelateral carina absent. Medial convex area with rasp-like sculpture, remaining parts with linear furrows. Lateral margins crenulate. Lateral edges strongly bent downwards at midlength in lateral view.

Prosternum 3.10 times wider than long ( Fig. 9 ). Mentonniere distinct, narrow, prosternal process wedge-shaped, weakly convex, sculpture composed of coarse, irregular furrows.

Scutellum 1.6 times as wide as long, subcordiform, shagreened.

Elytra 2.52 times longer than wide, humeri wider than base of pronotum. Lateral margins in anterior 1/4 subparallel, then gradually slightly arcuate widening to 2/3 length and then gradually rectilinearly narrowing to apex. Lateroposterior margin serrulate, apex emarginate. Sculpture formed of tightly packed, posteriorly elevated tile-like rugae.

Legs. Metatibia slender, inner margin distally curved outwards and coarsely serrate along distal 1/4 length ( Fig. 5 ).

Abdomen. Ventrite 5 deeply impressed before apex, its posterior margin with a broad curved emargination. Submarginal edge of ventrite 5 projecting, roof-like, its margin weakly emarginate and indistinctly serrate ( Fig. 11 ).

Aedeagus as in Fig. 7 .

Sexual dimorphism. Female ( Fig. 2 ). Antenna 0.85 times as long as pronotum. Pronotum 1.43 times wider than long. Elytra 2.36 times longer than wide. Meso- and metatibiae unarmed. Posterior emargination of ventrite 5 narrower than in males. Submarginal edge of ventrite 5 projecting, roof-like, not emarginate ( Fig. 12 ).

Variability. Length 6.4–11.0 mm, width 2.0– 3.6 mm. Emargination of elytral apex variable, in holotype strong, other specimens weakly emarginate to aparently truncate and in a few specimens rounded.

Differential diagnosis. See Table 1.

Etymology. This species is named after the collectors of the type specimens, Roman Businský, Czech botanist and specialist in the taxonomy of Pinus (Pinaceae) , and his wife Ludmila.

Distribution. China (Chongqing, Hubei, Sichuan).

Figures

Figs 1–8. 1–4 – habitus. 1–2 – Coraebus businskyorum Xu & Kubáň, sp. nov. (1 – holotype J, Hubei,10.5 mm; 2 – paratype ♀, Hubei, 10.8 mm); 3–4 – C. amplithorax (Fairmaire, 1889) (3 – J, China, Yunnan, Deqen (VKCP), 8.5 mm; 4 – lectotype ♀, China, Yunnan, Deqen (MNHN), 8.8 mm). 5–6 – metatibia (5 – C. businskyorum sp. nov., J, holotype; 6 – C. amplithorax, J, same specimen as in Fig. 3). 7–8 – aedeagus (7 – C. businskyorum sp. nov., holotype; 8 – C. amplithorax, same specimen as in Fig. 3).

Figs 9–14.9–10 – prosternum (9 – Coraebus businskyorum Xu & Kubáň, sp.nov., holotypeJ, Hubei; 10 – C. amplithorax (Fairmaire, 1889)J, China,Yunnan, Deqen (VKCP)). 11–14 – ventrite 5 (11 – C. businskyorum Xu & Kubáň, sp. nov., holotype J; 12 – C. amplithorax J, China, Yunnan, Deqen (VKCP); 13 – C. businskyorum sp. nov., paratype ♀, Hubei; 14 – C. amplithorax, lectotype ♀, China, Yunnan, Deqen (MNHN)).