Cyclorhipidion japonicum

Taxonomic history

Xyleborus japonicus Nobuchi, 1981a: 150.

Cyclorhipidion japonicum (Nobuchi): Mandelshtam and Petrov 2009: 216; Smith et al., 2018b: 394.

Diagnosis

2.1−2.3 mm long (mean = 2.2 mm; n = 4); 2.81−3.5 times as long as wide. This species can be distinguished by the small size; declivitydeclivity:
downward slope of either the pronotum or elytra
obliquely truncatetruncate:
appearing cut off or suddenly shortened
, moderately to strongly sulcatesulcate:
deeply furrowed or grooved
; pronotumpronotum:
the dorsal surface of the thorax
elongate from dorsaldorsal:
of or relating to the upper surface; opposite of ventral
view (type 9); declivitydeclivity:
downward slope of either the pronotum or elytra
laterally sulcatesulcate:
deeply furrowed or grooved
to interstriaeinterstria:
longitudinal spaces along the elytra between the striae, which is not as<br /> impressed and bear smaller punctures.
3, interstriaeinterstria:
longitudinal spaces along the elytra between the striae, which is not as<br /> impressed and bear smaller punctures.
3 bearing five tuberclestubercle:
a small knob-like or rounded protuberance of the exoskeleton
along its length.

May be confused with

Cyclorhipidion laetum, C. neocavipenne and C. xeniolum

Distribution

China (Yunnan), Japan, South Korea, Russia (Far East), Taiwan, Thailand. Introduced into the United States (Florida) (Johnson and Smith 2023Johnson and Smith 2023:
Johnson AJ, Smith SM. 2023. Yet another new exotic ambrosia beetle (Coleoptera: Scolytinae: Xyleborini) in Florida: Cyclorhipidion japonicum (Nobuchi, 1981). The Coleopterists Bulletin 77: 148&-151. https://doi.org/10.1649/0010-065X-77.1.148)

Host plants

recorded only from Castanopsis and Quercus (Fagaceae) (Nobuchi 1981aNobuchi 1981a:
Nobuchi A. 1981a. Studies on Scolytidae (Coleoptera) XXII. Six new species and two new females of the genus Xyleborus from Japan. Kontyucirc; 49: 143-154.)

DNA data

Sequences available for COI and CAD.

COI: OM866992

CAD: OM891111