Taxonomic history

Xyleborus amputatus Blandford, 1894c: 575.

Amasa amputatus [sic!] (Blandford): Wood and Bright, 1992: 682.

Xylosandrus amputatus (Blandford): Dole and Cognato, 2010: 473.

Synonyms

Xyleborus melli Schedl, 1938: 463. Beaver, 2010: 55.

Diagnosis

2.80 mm long (mean = 2.80 mm; n = 5); 2.15−2.33 times as long as wide. This species can be distinguished by its moderate size; upper part of eye smaller than lower part; elytral disc weakly ascending apically, longer than declivity; declivital face steep, abruptly separated from disc; elytra appearing truncate; posterolateral margins of elytra carinate to suture forming a circumdeclivital ring; declivital face flat, coarsely shagreened, dull; declivity with four punctate, glabrous, straight striae visible; strial punctures large; interstriae glabrous, punctate; posterolateral margin smooth, not granulate; pronotum as long as wide, from dorsal view rounded (type 1) and lateral view basic (type 0), summit at midpoint, basal half shining, densely punctate; and broad, dense mycangial tuft on the pronotal base.

May be confused with

Amasa spp., Xylosandrus mancus, and X. n. sp. 3

Distribution

Cambodia*, China (Fujian, Guangdong*, Hunan, Shanghai*, Sichuan), Japan, Korea, Taiwan, Vietnam*; imported and established in USA (Cognato et al. 2011, Gomez et al. 2018a)

Host plants

recorded from Acer (Aceraceae), Cinnamomum, Machilus (Lauraceae), Pelargonium (Geraniaceae), and Ziziphus (Rhamnaceae) (Dole and Cognato 2010)

DNA data

Sequences available for COI and CAD.

COI: MN620057; MN620058; MN620059; MN620060; HQ317870

CAD: MN620325; MN620326; MN620327