Cnestus aterrimus

Taxonomic history

Xyleborus aterrimus Eggers, 1927a: 400.

Cnestus aterrimus (Eggers): Browne, 1961b: 173. 

Synonyms

Tosaxyleborus pallidipennis Murayama, 1950: 49. Smith et al. 2018b: 394.

Xyleborus nitens Browne, 1955: 358. Schedl 1958c: 145.

Cnestus murayamai Schedl, 1962a: 207 (new name for C. pallidipennis Murayama nec Eggers 1940Eggers 1940:
Eggers H. 1940. Neue indomalayische Borkenkauml;fer (Ipidae) III Nachtrag (Forstsetzung). Tijdschrift voor Entomologie 83: 132-154.). Smith et al. 2018b: 394.

Xyleborus murayamai Browne, 1963: 54 (new name for C. pallidipennis Murayama nec Eggers 1940Eggers 1940:
Eggers H. 1940. Neue indomalayische Borkenkauml;fer (Ipidae) III Nachtrag (Forstsetzung). Tijdschrift voor Entomologie 83: 132-154.). Smith et al. 2018b: 394.

Xyleborus pseudosuturalis Schedl, 1964c: 315. Hulcr and Cognato 2013: 58.

Cnestus maculatus Browne, 1983b: 33. Smith et al. 2018b: 394.

Diagnosis

1.8−2.6 mm long (mean = 2.34 mm; n = 5); 2.09−2.36 times as long as wide. This species can be 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
declivitydeclivity:
downward slope of either the pronotum or elytra
rounded; elytraelytron:
the two sclerotized forewings of beetles that protect and cover the flight wings
typically with a transparent area (may also be solid black); pronotumpronotum:
the dorsal surface of the thorax
from dorsaldorsal:
of or relating to the upper surface; opposite of ventral
view basic (type 1); antennalantennal:
pertaining to the antennae
club type 1, with no sutures visible on the posteriorposterior:
toward the rear end; opposite of anterior
face; antennalantennal:
pertaining to the antennae
funicle three segmented; protibiaprotibia:
tibia of the first pair of legs
obliquely triangular; declivitaldeclivital:
pertaining to the elytral declivity
striae with punctures similar to those of discdisc:
the flat central upper surface of any body part (e.g. pronotum and elytra)
; and declivitaldeclivital:
pertaining to the elytral declivity
interstriae 2 and 3 not narrowed toward apexapex:
point or edge furthest from the body; opposite of base
, at most striaestria:
punctures in rows, which may or may not be impressed to make grooves
1 and 2 impressedimpressed:
a depression in a surface
.

This species strongly resembles Cnestus suturalis which has much coarser declivitaldeclivital:
pertaining to the elytral declivity
strial punctures that are deeper than those of discdisc:
the flat central upper surface of any body part (e.g. pronotum and elytra)
, interstriaeinterstria:
longitudinal spaces along the elytra between the striae, which is not as<br /> impressed and bear smaller punctures.
2 and 3 strongly narrowed toward apexapex:
point or edge furthest from the body; opposite of base
, striaestria:
punctures in rows, which may or may not be impressed to make grooves
1−3 impressedimpressed:
a depression in a surface
.

May be confused with

Cnestus suturalis

Distribution

China (Chongqing, Fujian, Hainan, Hong Kong, Hubei, Hunan, Sichuan, Xizang, Yunnan), Indonesia (Java, Sumatra), Japan, South Korea, Laos, West Malaysia, New Guinea, Taiwan, Thailand, Vietnam

Host plants

polyphagous (Browne 1961bBrowne 1961b:
Browne FG. 1961b. The biology of Malayan Scolytidae and Platypodidae. Malayan Forest Records 22: 1-255.)

Remarks

Browne (1961b) describes the gallery system and biology.

DNA data

Sequences available for COI and CAD.

COI: GU808695.1; MN619868; MN619869; MN619870; MN619871; MN619872

CAD: GU808620.1; MN620159; MN620160