Cnestus ater | Southeast Asian Ambrosia Beetle ID

Taxonomic history

Xyleborus ater Eggers, 1923: 210.

Xylosandrus ater (Eggers): Wood 1989: 177.

Cnestus ater (Eggers): Dole and Cognato 2010: 528.

Synonyms

Xyleborus retusiformis Schedl, 1936d: 31. Wood 1989: 177.

Diagnosis

3.9−4.1 mm long (mean = 4.0 mm; n = 4); 1.63−1.70 times as long as wide. This species is distinguished by the presence of a mesonotal mycangial tuftmycangial tuft:
tuft of setae that denotes the mycangia exterior opening
on the pronotalpronotal:
pertaining to the pronotum
basebase:
point or edge closest to the body; opposite of apex
; elytralelytral:
pertaining to the elytra
discdisc:
the flat central upper surface of any body part (e.g. pronotum and elytra)
4−5 times scutellum length; declivitydeclivity:
downward slope of either the pronotum or elytra
, obliquely truncateobliquely truncate:
nearly truncate but rounded not flat in lateral view
; pronotumpronotum:
the dorsal surface of the thorax
type 1 when viewed dorsally; antennalantennal:
pertaining to the antennae
club type 2, with 2 sutures visible on posteriorposterior:
toward the rear end; opposite of anterior
face; antennalantennal:
pertaining to the antennae
funicle 4-segmented; protibiaeprotibia:
tibia of the first pair of legs
obliquely triangular; procoxae narrowly separated; declivitaldeclivital:
pertaining to the elytral declivity
posterolateral margin weakly carinate from apexapex:
point or edge furthest from the body; opposite of base
to declivitaldeclivital:
pertaining to the elytral declivity
basebase:
point or edge closest to the body; opposite of apex
along interstriaeinterstria:
longitudinal spaces along the elytra between the striae, which is not as<br /> impressed and bear smaller punctures.
7; declivitaldeclivital:
pertaining to the elytral declivity
interstriae weakly granulategranulate:
pertaining to a coarse, grainy surface texture
, setose with 5−6 rows of recumbentrecumbent:
pertaining to setae that are flat against the cuticle
hair-like setaeseta:
small hair-like or scale-like structure
on interstriaeinterstria:
longitudinal spaces along the elytra between the striae, which is not as<br /> impressed and bear smaller punctures.
2−3; striaestria:
punctures in rows, which may or may not be impressed to make grooves
indistinct on declivitydeclivity:
downward slope of either the pronotum or elytra
, striaestria:
punctures in rows, which may or may not be impressed to make grooves
1 and 2 impressedimpressed:
a depression in a surface
; discaldiscal:
pertaining to the disc of either the pronotum or elytra
punctures dense, confusedconfused:
of markings, having indefinite outlines or running together as lines or spots without definite pattern; usually referring to punctures
, surface distinctly reticulatereticulate:
superficially netlike or made up of a network of lines
between punctures; and body black with basalbase:
point or edge closest to the body; opposite of apex
part of pronotalpronotal:
pertaining to the pronotum
discdisc:
the flat central upper surface of any body part (e.g. pronotum and elytra)
sometimes orange or brown.