Cyclorhipidion pelliculosum (Eichhoff, 1878) Fig. 43G, H, L

Xyleborus pelliculosus Eichhoff, 1878a: 392.

Cyclorhipidion pelliculosum (Eichhoff): Hulcr and Cognato 2010a: 12.

Xyleborus seiryorensis Murayama, 1930: 25. Synonymy: Knížek 2011: 243.

Xyleborus quercus Kurentzov, 1948: 51. Synonymy: Knížek 2011: 243.

Xyleborus starki Nunberg, 1956: 209 (new name for X. quercus Kurentzov, 1948 nec Hopkins 1915). Synonymy: Knížek 2011: 243.

Type material.

Syntypes Xyleborus seiryorensis (NMNH, 3).

New records.

Taiwan: Ilan Co., Fushan, 2000 m, 27.vi.1995, A. Warneke, ex light trap (RABC, 1); as previous except: 26.vii.1995 (RABC, 1).

Diagnosis.

3.2-3.5 mm long (mean = 3.3 mm; n = 5); 2.67-3.0 × as long as wide. This species is distinguished by the short, steep declivity that is approximately 25% of total elytral length, armed with large tubercles on interstriae 1 and 3, interstriae 2 always unarmed; posterolateral margins rounded; and declivital interstriae 1 setae in three confused rows, interstriae 2 setae uniseriate (Table 1).

Similar species.

This species is a part of a challenging species group consisting of C. bodoanum, C. distinguendum, C. inarmatum, C. tenuigraphum, and C. xeniolum (Table 1).

Distribution.

China (Shanxi, Sichuan), Japan, South & North Korea, Russia (Far East), Taiwan*. Imported to USA (Atkinson et al. 1990).

Host plants.

Most records are from Castanopsis and Quercus ( Fagaceae), but the species has also been recorded from Acer ( Aceraceae), Juglans ( Juglandaceae) and from Alnus and Betula ( Betulaceae) (Mandelshtam et al. 2018).