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 .