Xyleborinus tritus

Taxonomic history

Xyleborinus tritus 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): 360.

Diagnosis

2.2−2.5 mm long (mean = 2.33 mm; n = 4); 3.0−3.14 times as long as wide. This species is distinguished by the declivitaldeclivital:
pertaining to the elytral declivity
face with interstriaeinterstria:
longitudinal spaces along the elytra between the striae, which is not as<br /> impressed and bear smaller punctures.
2 unarmed by tuberclestubercle:
a small knob-like or rounded protuberance of the exoskeleton
, granulesgranule:
a small rounded protuberance, like grains of sand
present on apicalapex:
point or edge furthest from the body; opposite of base
1/3 of discdisc:
the flat central upper surface of any body part (e.g. pronotum and elytra)
; odd numbered declivitaldeclivital:
pertaining to the elytral declivity
interstriae strongly convexconvex:
appearing rounded
, bases of denticlesdenticle:
a small tooth, the sides of which are equal and the tip is above the middle of the base
tumescent; and striaestria:
punctures in rows, which may or may not be impressed to make grooves
1 nearly convergent with striaestria:
punctures in rows, which may or may not be impressed to make grooves
2 on declivitaldeclivital:
pertaining to the elytral declivity
face, interstriaeinterstria:
longitudinal spaces along the elytra between the striae, which is not as<br /> impressed and bear smaller punctures.
2 not apparent.

May be confused with

Xyleborinus exiguus, X. huifenyinae, and X. perpusillus

Distribution

China (Yunnan), Laos, 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

Sequences available for COI and CAD.

COI: OP617764

CAD: OP607193