Xyleborinus disgregus

Taxonomic history

Xyleborinus disgregus 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): 340.

Diagnosis

1.8−2.0 mm long (mean = 1.87 mm; n = 3); 3.0−3.33 times as long as wide. This species is distinguished by the posteriorposterior:
toward the rear end; opposite of anterior
margin of elytraelytron:
the two sclerotized forewings of beetles that protect and cover the flight wings
broadly rounded; 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.
1 and 2 unarmed by tubercles; elytralelytral:
pertaining to the elytra
declivitaldeclivital:
pertaining to the elytral declivity
face feebly sulcatesulcate:
deeply furrowed or grooved
; small body size; laterallateral:
pertaining to the side
declivitaldeclivital:
pertaining to the elytral declivity
margins weakly elevated, bearing 3 pairs of sharply pointed denticlesdenticle:
a small tooth, the sides of which are equal and the tip is above the middle of the base
, denticlesdenticle:
a small tooth, the sides of which are equal and the tip is above the middle of the base
increasing in size from basebase:
point or edge closest to the body; opposite of apex
to apexapex:
point or edge furthest from the body; opposite of base
; denticlesdenticle:
a small tooth, the sides of which are equal and the tip is above the middle of the base
along interstriaeinterstria:
longitudinal spaces along the elytra between the striae, which is not as<br /> impressed and bear smaller punctures.
5 distinctly smaller than those on interstriaeinterstria:
longitudinal spaces along the elytra between the striae, which is not as<br /> impressed and bear smaller punctures.
3; sulcatesulcate:
deeply furrowed or grooved
area impunctate, surface strongly shagreenedshagreened:
covered with a closely-set roughness, like shark skin
, dull; and elongate body form.

May be confused with

Xyleborinus cuneatus, X. jianghuasuni, and X. sculptilis

Distribution

India (Arunachal Pradesh), 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: MN620023

CAD: MN620290