Hemicyclus punctulatus

1 Darkling beetle at Gungahlin, ACT

Hemicyclus punctulatus at Gungahlin, ACT - 28 Nov 2025 06:12 PM
Hemicyclus punctulatus at Gungahlin, ACT - 28 Nov 2025 06:12 PM
Hemicyclus punctulatus at Gungahlin, ACT - 28 Nov 2025 06:12 PM
Hemicyclus punctulatus at Gungahlin, ACT - 28 Nov 2025 06:12 PM
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Identification history

Hemicyclus punctulatus 8 Dec 2025 KimberiRP
Chalcopteroides cupripennis 7 Dec 2025 MichaelMulvaney
Unverified 30 Nov 2025 chriselidie

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4 comments

chriselidie wrote:
   7 Dec 2025
I'm not quite convinced that this is C. cupripennis as the beetle that I saw looked rounder and doesn't have a regular linear 'dot' pattern. The dots are distributed randomly over the back. But I'm far from an expert on this, maybe the pattern can vary quite a bit?
KimberiRP wrote:
   8 Dec 2025
Not a Chalcopteroides, but the much rarer Hemicyclus punctulatus. Although the colours are similar, it can be distinguished from Chalcopteroides by the narrow flanges on the sides of the elytra and wider flanges on the sides of the pronotum. Other differences that "chriselidie" noticed are the more widely rounded shape (hence the 'cyclus' part of the name), and the lack of striae (lengthwise grooves) on the elytra.
chriselidie wrote:
   8 Dec 2025
Yes, this one looks exactly like the one I saw. This was in an area where there also were some Chalcopteroides columbinus - almost didn't notice they were different beetles at first as the colour is so similar
   9 Dec 2025
Thanks Kim and criselidie

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Location information

Sighting information

Additional information

  • Eucalyptus bark Associated plant
  • 25mm to 50mm Animal size

Species information

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  • Verified by an expert moderator
  • Nearby sighting(s) of same species
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