Xyleborus yunnanensis

Taxonomic history

Xyleborus yunnanensis 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): 382.

Diagnosis

2.7−2.75 mm long (mean = 2.73 mm; n = 3); 3.06−3.17 times as long as wide. This species is distinguished by the declivitaldeclivital:
pertaining to the elytral declivity
interstriae 1 widened from basebase:
point or edge closest to the body; opposite of apex
to midpoint of declivitydeclivity:
downward slope of either the pronotum or elytra
, then narrowed to apexapex:
point or edge furthest from the body; opposite of base
; declivitaldeclivital:
pertaining to the elytral declivity
striae not impressedimpressed:
'a depression in a surface
; three strong spinesspine:
an elongate projection of the exoskeleton that is longer than its basal width
on declivitaldeclivital:
pertaining to the elytral declivity
interstriae 1, and 3 slightly weaker spinesspine:
an elongate projection of the exoskeleton that is longer than its basal width
on declivitaldeclivital:
pertaining to the elytral declivity
interstria 3, declivitaldeclivital:
pertaining to the elytral declivity
interstria 2 with at most a small spinespine:
an elongate projection of the exoskeleton that is longer than its basal width
near top of declivitydeclivity:
downward slope of either the pronotum or elytra
; all interstriaeinterstria:
'longitudinal spaces along the elytra between the striae, which is not as<br /> impressed and bear smaller punctures.
with spinesspine:
an elongate projection of the exoskeleton that is longer than its basal width
only, lacking granules; discaldiscal:
pertaining to the disc of either the pronotum or elytra
interstriae much wider than striaestria:
punctures in rows, which may or may not be impressed to make grooves
, strial punctures about twice the diameter of interstrial punctures, the latter very sparse on discdisc:
the flat central upper surface of any body part (e.g. pronotum and elytra)
; posterolateralposterolateral:
'relating to end of the side part/portion
margin of declivitydeclivity:
downward slope of either the pronotum or elytra
costate and with a row of small spinesspine:
an elongate projection of the exoskeleton that is longer than its basal width
to interstriaeinterstria:
'longitudinal spaces along the elytra between the striae, which is not as<br /> impressed and bear smaller punctures.
6; and integument smooth and strongly shiningshining:
appearing glossy or bright in luster; referring to a surface that is polished and reflects light well
on both dorsaldorsal:
'of or relating to the upper surface; opposite of ventral
and ventralventral:
of or relating to the lower surface; opposite of dorsal
surfaces, only the head reticulatereticulate:
superficially netlike or made up of a network of lines
and less shiny.

May be confused with

Xyleborus pfeilii and Xyleborus mysticulus

Distribution

China (Yunnan)

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