Taxonomic history

Amasa youlii Smith, Beaver & Cognato 2020 (in Smith et al. 2020b): 47.


2.9−3.0 mm long (mean = 2.93 mm; n = 3); 2.42−2.5 times as long as wide. This species can be distinguished by the pronotum appearing basic (type 2) when viewed dorsally, anterior margin serrate; elytral declivital surface smooth, moderately shining; small size; declivital interstriae setose, setae recumbent; declivital face flattened; and interstriae 1 weakly inflated from apex to near midpoint of declivity; striae 3 strongly displaced laterad, striae 1−3 not appearing equidistant.

May be confused with

Amasa concitata, A. gibbosa, A. lini, and A. tropidacron


China (Fujian)

Host plants

unknown (Smith et al. 2020b)

DNA data

Sequences available for COI and CAD.

COI: MN619809

CAD: MN620109