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Keyhole ambrosia beetle

Scientific Name
Amasa truncata
Scientific Author
(Erichson, 1842)
Taxonomy
(Coleoptera: Curculionidae: Scolytinae: Scolytini)
Status
Native Australian Pest Species
Reliability
High
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Diagnostic Images

Head Front Image
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Caption
Vic., Lorne, 26 October 1918, F. E. Wilson
Source
Sarah McCaffrey Museum Victoria
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Diagnostic Images (8)
Diagnostic Notes
The adults are light-brown, cylindrical, and rather broad in proportion to their length. They are 3mm long and 1.5mm wide. The rear ends of the elytra (wing cases) are sharply truncated at an angle of about 75 degrees. The thorax, which is about three-quarters the length of the elytra, is parallel-sided and rounded in front. The folded hind wings of the female can be seen as dark spots through the rear part of the elytra. The male has no dark spots since it has no hind wings. In side view the rear half of the thorax of the female is straight, whereas that of the male is convex. The eyes of the male are narrower than those of the female. The males seldom emerge from the nest but occasionally crawl over the surface of the wood.
More Information
Specimen Contact
Museum Victoria
Author
Ken Walker
Created
10/06/2011 05:16 AEST
Last Updated
25/11/2011 15:53 AEST
Citation
Ken Walker (2011) Keyhole ambrosia beetle (Amasa truncata) Updated on 11/25/2011 3:53:59 PM Available online: PaDIL - http://www.padil.gov.au.
Image Use
Free for use under the Creative Commons Attribution 3.0 Australia License

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