Ambrosiophilus cristatulus

Taxonomic history

Xyleborus cristatulus Schedl, 1953b: 300.

Ambrosiodmus cristatulus (Schedl): Wood and Bright, 1992: 672.

Ambrosiophilus cristatulus (Schedl): Beaver et al., 2014: 24.

Diagnosis

2.1−2.3 mm long (mean = 2.21 mm; n = 4); 2.30−2.39 times as long as wide. This species can be distinguished by declivitaldeclivital:
pertaining to the elytral declivity
interstriae 1 unarmed; interstriae 2 armed by one tubercletubercle:
a small knob-like or rounded protuberance of the exoskeleton
at declivitaldeclivital:
pertaining to the elytral declivity
summit, remainder of interstriaeinterstria:
longitudinal spaces along the elytra between the striae, which is not as<br /> impressed and bear smaller punctures.
2 unarmed; interstriae 3 with three small denticles; declivitydeclivity:
downward slope of either the pronotum or elytra
weakly bisulcatebisulcate:
pertaining to an elytral declivity with two suci; a sulcus present on each elytron but the suture remains convex
from sutural margin to striaestria:
punctures in rows, which may or may not be impressed to make grooves
2; interstriaeinterstria:
longitudinal spaces along the elytra between the striae, which is not as<br /> impressed and bear smaller punctures.
3 weakly convexconvex:
appearing rounded
; pronotalpronotal:
pertaining to the pronotum
discaldiscal:
pertaining to the disc of either the pronotum or elytra
punctures small, fine, moderately spaced by 1−3 diameters of a puncture, surface shagreenedshagreened:
covered with a closely-set roughness, like shark skin
; declivitaldeclivital:
pertaining to the elytral declivity
surface smooth, shiningshining:
appearing glossy or bright in luster; referring to a surface that is polished and reflects light well
; and small size.

May be confused with

Ambrosiophilus consimilis, A. indicus, and A. subnepotulus

Distribution

China (Fujian, Yunnan), East & West Malaysia, Thailand

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