Microperus kadoyamaensis (Murayama, 1934)

Smith, Sarah M., Beaver, Roger A. & Cognato, Anthony I., 2020, A monograph of the Xyleborini (Coleoptera, Curculionidae, Scolytinae) of the Indochinese Peninsula (except Malaysia) and China, ZooKeys 983, pp. 1-442 : 1

Microperus kadoyamaensis (Murayama, 1934) Fig. 67E, F, K

Xyleborus kadoyamaensis Murayama, 1934: 290.

Microperus kadoyamaensis (Murayama): Hulcr et al. 2007: 580.

Xyleborus denseseriatus Eggers, 1941b: 225. syn. nov.

Xyleborus nameranus Murayama, 1954: 194. Synonymy: Smith et al. 2018b: 396.

Xyleborus pubipennis Schedl, 1974: 263. syn. nov.

Xyleborus huangi Browne, 1983b: 34. Synonymy: Beaver 2011: 285.

Type material.

Syntypes Xyleborus kadoyamaensis (NMNH, 2). Holotype Xyleborus denseseriatus (ZMFK). Paratype Xyleborus huangi (NHMUK). Syntypes Xyleborus nameranus (NMNH, 2). Paratype Xyleborus pubipennis (NHMW).

New records.

China: Guangdong, Nanling N. P., 25.iii.2005, P. Grootaert (IRSNB, 1). Guangxi Reg., Miaoershan, S slope, 800-1300 m, 20-27.vi.1997, Bolm (RABC, 9). Hong Kong, Tai Po Kau, vi.2017, J. Skelton (MSUC, 1). Jiangxi, Long Nan, 12.vii.2016, Lv-Jia, Lai, S-C., ex Cyclobalanopsis glauca (RABC, 1); as previous except: Jinggang Shan Mts., Xiangzhu vill. env., 26°35.5'N, 114°16.0'E, 374 m, rice fields, forested stream valley, M. Fikáček, J. Hájek (NHMP, 1). Yunnan S, Xishuangbanna, 23 km NW Jinghong, vic. Na Ban (NNNR), 22°10'N, 100°39'E, 700-1000 m, v-vii.2009, L. Meng (NKME, 12; RABC, 6); as previous except: 22°09.49'N, 100°39.92'E, 730 m, second[ary]. for[est], 6.vi.2008, A. Weigel (NKME, 1). Zhejiang, Gutianshan Nat. N. Res., 29°8'18"-29°17'29"N, 118°2'14"-118°11'12"E, CSP21-SE/5 (RABC, 1). Vietnam: Cao Bang, 22°34.118'N, 105°52.537'E, 1048 m, 12-17.iv.2014, VN9, Cognato, Smith, Pham, ex FIT (MSUC, 3).

Diagnosis.

1.8-2.0 mm long (mean = 1.92 mm; n = 5); 2.86-3.17 × as long as wide. This species is distinguished by the declivital interstriae densely covered with short semi-erect scales; elytral disc medially convex, appearing humped; declivity long, gradual; all declivital interstriae uniformly granulate from base to apex; declivital face convex; and posterolateral costa granulate.

Similar species.

Microperus diversicolor , M. minax , M. quercicola .

Distribution.

China (Fujian, Guangdong*, Guangxi, Hong Kong*, Hunan, Jiangxi*, Yunnan*, Zhejiang*), Japan, South Korea, Taiwan, Vietnam.

Host plants.

Polyphagous attacking both gymnosperm and angiosperm trees ( Beaver and Liu 2010).

Remarks.

Xyleborus pubipennis was recently placed in synonymy with Microperus parvus (Lea, 1894) ( Hulcr and Cognato 2010a). However, the type does not resemble M. parvus at all; the declivity is densely setose and clearly the same as that of M. kadoyamaensis . Hulcr and Cognato (2013) list the occurrence of M. parvus in Vietnam based on their synonymy of X. pubipennis . Microperus parvus occurs in Australasia not the Oriental region. The X. denseseriatus holotype was also examined and found to be conspecific with the syntype series of X. kadoyamaensis . Both X. denseseriatus and X. pubipennis are here placed in synonymy with M. kadoyamaensis .

Figures

Figure 67. Dorsal, lateral and declivital view of Microperus diversicolor, 1.6 - 1.8 mm (A, B, I), M. fulvulus lectotype, 2.8 - 2.95 mm (C, D, J), M. kadoyamaensis, 1.8 - 2.0 mm (E, F, K), and M. kirishimanus, 1.6 - 1.8 mm (G, H, L).