Scarab beetles (Scarabaeidae)
Find out more about Anoplognathus species Christmas Beetles on the Australian Museum website: https://australian.museum/learn/collections/natural-science/entomology/christmas-beetles/ or view all the Christmas Beetle records on NatueMapr in this Collection: https://naturemapr.org/collections/sightings/11178
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Discussion
DiBickers
wrote:
29 Mar 2025
Thanks so much for helping us with Species-level discussion @HaukeKoch, really appreciated💚
Anoplognathus sp. (genus)
HaukeKoch
wrote:
29 Mar 2025
Thanks Di,
I think that view also looks like A. boisduvalii, but it's not very visible.
Ideally, you'd want to see the area in this image for A. boisduvalii:
https://www.inaturalist.org/photos/252515833
Here is A. porosus for comparison, which has lines of white setae along the outer margins and through the midline of the pygidium, and a more polished surface structure:
https://www.inaturalist.org/photos/57698605
A. pallidicollis can also look similar to A. porosus, but has the pygidium covered across the whole surface in white setae.
I think that view also looks like A. boisduvalii, but it's not very visible.
Ideally, you'd want to see the area in this image for A. boisduvalii:
https://www.inaturalist.org/photos/252515833
Here is A. porosus for comparison, which has lines of white setae along the outer margins and through the midline of the pygidium, and a more polished surface structure:
https://www.inaturalist.org/photos/57698605
A. pallidicollis can also look similar to A. porosus, but has the pygidium covered across the whole surface in white setae.
Anoplognathus sp. (genus)
DiBickers
wrote:
26 Mar 2025
@HaukeKoch there is a 2nd photo on this sighting which shows the dorsal-view but not sure if it shows the pygidium detail you need (just wanted to let you know in case you didn’t see the 2nd photo)😊
Anoplognathus sp. (genus)
HaukeKoch
wrote:
26 Mar 2025
This is likely A. boisduvalii given the streaked pattern of dark punctures on the elytra, but to definitely exclude A. porosus it's best to get a clear view of the back showing the dorsal side of the pygidium.
Anoplognathus sp. (genus)
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