Ips chinensis Kurentzov & Kononov, 1966

Knížek, Milos & Cognato, Anthony I., 2017, Validity of Ips chinensis Kurentzov & Kononov confirmed with DNA data, Zoological Systematics 42 (2), pp. 229-235 : 233-234

Ips chinensis Kurentzov & Kononov, 1966

Material examined. China, Hebei Prov., Xingtai, Taihang Mts., Neiqiu , Xinjiayu (elev. 1300 m), 19. V. 2002, coll. M. Knížek (Ipsacu 4, 5) ; Qinghai Prov., Tongren, Kan Bula (36°07'024''N, 101°43'722''E; elev. 2600 m), 21.VII. 2006, coll. M. Knížek (Ipsacu 6, 7) ; Sichuan Prov. Jiuzhaigou , 13–19. VI.2009, coll. E. Kučera (Ipsacu 8) ; Yunnan Prov. Near Kunming , 1. VI.2006, ex Pinus yunnanensis , coll. C. Bateman (Ipsacu 25, 26) . Laos, Khammouan Prov., Nakai env. (17°43'N, 105°09'E; elev. 500–600m), 22.V–8. VI.2001, coll. E. Jendek & O. Šauša (Ipsacu 2, 3) . Thailand, Chaiyaphum Prov., Phu Khieo Wildlife Reserve , 18.VII.2005 (Ipsacu 11, 12) ; Chiang Mai Prov., VII.2002 (Ac 7) .

Male. Frons deeply granulate punctate, rugose longitudinally, with a pair of closely set tubercles in the middle, positioned on the middle frontal callous-like elevation. Antennal club with bisinuate sutures, 2nd suture strongly bisinuate. Elytral interstriae convex, equal width as striae, 2nd to 6th with no punctures or punctures sparse and minute except for the apex with obvious punctures, 7th and remaining interstriae with obvious punctures. Striae deep, densely punctate, distance between the punctures smaller than puncture diameter. Elytral declivity, 1st spine on 2nd interstriae, 2nd spine on 4th interstriae, 3rd spine on 4th and 5th interstriae, 2nd and 3rd spine with a common tumescence base, distance between the 1st and 2nd spine larger than between the 2nd and 3rd spines, 3rd spine flat, basal width smaller than the interstriae, sides parallel (from lateral view), directed posteriad and obliquely upward, bifid, both processes of equal size, connection between the processes straight. Declivital disc shining, irregularly and not densely punctured. Outline of the elytral edge with continuous rounded costa from the apex to 7th interstriae, the tubercle-like process on the elytral apex bent dorsally.

Females. Similar to males, except the 2nd and 3rd declivital spine subequal.

Comments. The connection of the 2nd and 3rd spines and their shape vary between northern and southern populations. The second elytral interstriae have sparse shallow punctures in Hebei, Qinghai and Sichuan specimens. The punctures are missing from the second elytral interstriae (discal area) among individuals from Yunnan, Laos and Thailand. The 2nd and 3rd declivital spines are connected by a shallow tumescence appearing separated in Hebei, Qinghai and Sichuan specimens ( Fig. 2 ), while the 2nd and 3rd declivital spines are connected by a higher tumescence among individuals from Yunnan, Laos and Thailand.

Funding Ministry of Agriculture of the Czech Republic – Resolution RO0116 (10462/2016-MZE-17011) to MK and NSF grants (DEB–0328920, DEB-1607201) to AIC, in part, supported this study.

Acknowledgements We thank editors Dr. Fuqiang Chen, Dr. Chaodong Zhu, and Dr. Gexia Qiao (Institute of Zoology, Chinese Academy of Sciences, Beijing) for the invitation to publish this study and Prof. Xiujun Wen (Southern Agriculture University, Guangzhou) and Mr. Yinzhong Cui (Pherobio technology Co. ltd., Beijing) for help in the field. Also we thank Craig Bateman, Dr. Jiri Hulcr, Dr. Eduard Jednek, Dr. Lawrence Kirkendall, Emil Kučera, Dr. Ondrej Šauša for their contribution of specimens. Dr. Michail Mandelshtam provided helpful discussion and translation of Russian and Dr. Sarah Smith provided reviews of early manuscripts.

Figures

Figure 2. Comparison of the elytral declivities of Ips acuminatus. A. I. chinensis, China, Hebei Prov. B. I. chinensis, Thailand, Chiang Mai Prov. C. Numbers correspond to the spines.