Ambrosiophilus subnepotulus

Taxonomic history

Xyleborus subnepotulus Eggers, 1930: 178.

Ambrosiodmus subnepotulus (Eggers): Wood and Bright, 1992: 680.

Ambrosiophilus subnepotulus (Eggers): Beaver and Liu, 2010: 22.

Synonyms

Xyleborus cristatuloides Schedl, 1971a: 284. Smith et al. 2020b: 70.

Diagnosis

2.5−2.8 mm long (mean = 2.64 mm; n = 7); 2.27−2.6 times as long as wide. This species can be distinguished by declivitaldeclivital:
pertaining to the elytral declivity
interstriae 1 unarmed, interstriaeinterstria:
longitudinal spaces along the elytra between the striae, which is not as<br /> impressed and bear smaller punctures.
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, 2 large tuberclestubercle:
a small knob-like or rounded protuberance of the exoskeleton
on interstriaeinterstria:
longitudinal spaces along the elytra between the striae, which is not as<br /> impressed and bear smaller punctures.
3; 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 minute, very fine, widely spaced by 2−6 diameters of a puncture, surface shiningshining:
appearing glossy or bright in luster; referring to a surface that is polished and reflects light well
; and 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 moderate size.

May be confused with

Ambrosiophilus consimilis, A. cristatulus, A. indicus, and A. osumiensis

Distribution

China (Guizhou, Hong Kong), Indonesia (Java), Laos, Myanmar, Sri Lanka, Taiwan

Host plants

recorded host is Albizia lebbeck (Fabaceae) (Beeson 1930Beeson 1930:
Beeson CFC. 1930. The biology of the genus Xyleborus , with more new species. Indian Forest Records 14: 209-272.)

DNA data

Sequences available for COI.

COI: MN619837