Webbia biformis

Taxonomic history

Webbia biformis Browne, 1958: 496. 

Diagnosis

2.4−3.0 mm long (mean = 2.67 mm; n = 3); 3.43−3.75 times as long as wide. This species is distinguished by the circumdeclivital margin denticulatedenticulate:
covered in denticles
; declivitaldeclivital:
pertaining to the elytral declivity
face bearing a large triangular spinespine:
an elongate projection of the exoskeleton that is longer than its basal width
that is as much broader at apexapex:
point or edge furthest from the body; opposite of base
than basebase:
point or edge closest to the body; opposite of apex
; basebase:
point or edge closest to the body; opposite of apex
of spinespine:
an elongate projection of the exoskeleton that is longer than its basal width
elongate, occupying approximately a third of declivitaldeclivital:
pertaining to the elytral declivity
length; acute spinespine:
an elongate projection of the exoskeleton that is longer than its basal width
at elytralelytral:
pertaining to the elytra
apexapex:
point or edge furthest from the body; opposite of base
arising from the sutural interstriae; and discaldiscal:
pertaining to the disc of either the pronotum or elytra
interstriae 1 denticulatedenticulate:
covered in denticles
, never prolonged into a short spinespine:
an elongate projection of the exoskeleton that is longer than its basal width
over the declivitydeclivity:
downward slope of either the pronotum or elytra
.

May be confused with

Webbia diversicauda and W. pabo

Distribution

East & West Malaysia, Thailand

Host plants

associated with Dipterocarpaceae (Dipterocarpus, Hopea, Shorea) (Browne 1961bBrowne 1961b:
Browne FG. 1961b. The biology of Malayan Scolytidae and Platypodidae. Malayan Forest Records 22: 1-255., Beaver and Browne 1975Beaver and Browne 1975:
Beaver RA, Browne FG. 1975. The Scolytidae and Platypodidae (Coleoptera) of Thailand, a checklist with biological and zoogeographical notes. Oriental Insects 9: 283-311. https://doi.org/10.1080/00305316.1975.10434499, 1979)

Remarks

Brood size can be as high as 120 in a gallery (Beaver and Browne 1978Beaver and Browne 1978:
Beaver RA, Browne FG. 1978. The Scolytidae and Platypodidae (Coleoptera) of Penang, Malaysia. Oriental Insects 12: 575-624. https://doi.org/10.1080/00305316.1978.10432538).

DNA data

Sequences available for COI and CAD.

COI: OP617811

CAD: OP607247