Amasa tropidacron

Taxonomic history

Amasa tropidacron Smith, Beaver & Cognato 2020 (in Smith et al. 2020bSmith et al. 2020b:
Smith SM, Beaver RA, and Cognato AI. 2020b. A monograph of the Xyleborini (Coleoptera, Curculionidae, Scolytinae) of the Indochinese Peninsula (except Malaysia) and China. ZooKeys 983: 1-442. https://doi.org/10.3897/zookeys.983.52630): 44.

Diagnosis

2.5−2.8 mm long (mean = 2.65 mm; n = 2); 2.5−2.54 times as long as wide. This species is distinguished by the pronotumpronotum:
the dorsal surface of the thorax
appearing basic (type 2) when viewed dorsally, anterioranterior:
the front or forward; opposite of posterior
margin serrate; elytralelytral:
pertaining to the elytra
declivitaldeclivital:
pertaining to the elytral declivity
surface glabrousglabrous:
smooth, devoid of vestiture
, smooth, strongly shiningshining:
appearing glossy or bright in luster; referring to a surface that is polished and reflects light well
; small size; declivitaldeclivital:
pertaining to the elytral declivity
face flattened; and interstriaeinterstria:
longitudinal spaces along the elytra between the striae, which is not as<br /> impressed and bear smaller punctures.
1 carinate from apexapex:
point or edge furthest from the body; opposite of base
to near midpoint of declivitydeclivity:
downward slope of either the pronotum or elytra
; striaestria:
punctures in rows, which may or may not be impressed to make grooves
1−3 approximately equidistant.

May be confused with

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

Distribution

Japan, Vietnam

Host plants

unknown (Smith et al. 2020bSmith et al. 2020b:
Smith SM, Beaver RA, and Cognato AI. 2020b. A monograph of the Xyleborini (Coleoptera, Curculionidae, Scolytinae) of the Indochinese Peninsula (except Malaysia) and China. ZooKeys 983: 1-442. https://doi.org/10.3897/zookeys.983.52630)

DNA data

specimens not available for sequencing