Webbia cornuta
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Webbia cornuta lateral; R.K. Osborn |
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Webbia cornuta dorsal; R.K. Osborn |
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Webbia cornuta declivity; R.K. Osborn |
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Webbia cornuta frontal; R.K. Osborn |
Taxonomic history
Webbia cornutus [sic] Schedl, 1942a: 183.
Diagnosis
1.9−2.2 mm long (mean = 2.02 mm; n = 5); 3.14−4.0 times as long as wide. This species is distinguished by the circumdeclivital margin denticulatedenticulate:
covered in denticles
, elytralelytral:
pertaining to the elytra
declivitydeclivity:
downward slope of either the pronotum or elytra
rather smooth and strongly shiningshining:
appearing glossy or bright in luster; referring to a surface that is polished and reflects light well
, striaestria:
punctures in rows, which may or may not be impressed to make grooves 1 and 3 very weakly impressedimpressed:
a depression in a surface
, interstriaeinterstria:
longitudinal spaces along the elytra between the striae, which is not as<br />
impressed and bear smaller punctures.
without granules; strial and interstrial punctures very fine, of the same size, bearing short fine hairs; short acute elytralelytral:
pertaining to the elytra
process arising from declivitaldeclivital:
pertaining to the elytral declivity
margin; and elytralelytral:
pertaining to the elytra
apexapex:
point or edge furthest from the body; opposite of base
entire.
May be confused with
Distribution
‘Borneo’, 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
As in W. biformis, brood size can be large (up to 87) (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). The majority of the records from Thailand listed under this species by Beaver et al. (2014) should be transferred to W. turbinata Maiti and Saha. The records from the southern provinces of Chumphon and Nakhon Sri Thammarat are correct.
DNA data
Sequences available for COI and CAD.
