Anisandrus congruens

Taxonomic history

Anisandrus congruens 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): 86.

Diagnosis

2.6–2.8 mm long (mean = 2.7 mm; n = 2); 2.16–2.36 times as long as wide. This species can be distinguished by the mesonotal mycangial tuftmycangial tuft:
tuft of setae that denotes the mycangia exterior opening
the length of the scutellumscutellum:
a shield-like sclerotized plate located at the midpoint of the elytral base 
; elytralelytral:
pertaining to the elytra
discdisc:
the flat central upper surface of any body part (e.g. pronotum and elytra)
with a weak to moderate transverse saddle-like depression; posterolateralposterolateral:
relating to end of the side part/portion
margin costate to interstriaeinterstria:
longitudinal spaces along the elytra between the striae, which is not as<br /> impressed and bear smaller punctures.
5; declivitydeclivity:
downward slope of either the pronotum or elytra
appearing bisulcatebisulcate:
pertaining to an elytral declivity with two suci; a sulcus present on each elytron but the suture remains convex
, moderately impressedimpressed:
a depression in a surface
from striaestria:
punctures in rows, which may or may not be impressed to make grooves
1−2, interstriaeinterstria:
longitudinal spaces along the elytra between the striae, which is not as<br /> impressed and bear smaller punctures.
3 strongly inflatedinflated:
blown up; distended
, tuberculate from summitsummit:
highest point, used for pronotum and elytra, denotes the peak between pronotal frontal slope and disc, and between elytral disc and declivity
to apicalapex:
point or edge furthest from the body; opposite of base
quarter then becoming flattened and unarmed to apexapex:
point or edge furthest from the body; opposite of base
; and moderate sharp backwardly pointed spinespine:
an elongate projection of the exoskeleton that is longer than its basal width
at basebase:
point or edge closest to the body; opposite of apex
of declivitaldeclivital:
pertaining to the elytral declivity
interstriae 2.

This species strongly resembles A. apicalis and A. cristatus and is most easily distinguished by the smaller size, more strongly impressedimpressed:
a depression in a surface
declivitaldeclivital:
pertaining to the elytral declivity
sulci than A. apicalis and larger spinesspine:
an elongate projection of the exoskeleton that is longer than its basal width
on interstriaeinterstria:
longitudinal spaces along the elytra between the striae, which is not as<br /> impressed and bear smaller punctures.
3 that are sharply pointed but not strongly backwardly hooked.

May be confused with

Anisandrus apicalis, A. cristatus, A. geminatus, A. niger, and A. sinivali.

Distribution

China (Yunnan), Thailand, 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: MN619848; OP617775

CAD: MN620141; OP607204