Insects
Moths (Lepidoptera)
Geometer moths (Geometridae)
Sighting 4549150

Idaea iodesma

A Geometer moth (Sterrhini at QPRC LGA

Idaea iodesma at QPRC LGA - suppressed
Idaea iodesma at QPRC LGA - suppressed
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Identification history

Idaea iodesma 7 May 2025 donhe
Idaea iodesma 3 May 2025 WendyEM
Idaea (genus) 30 Jan 2024 ibaird
Idaea (genus) 30 Jan 2024 DianneClarke

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User's notes

Seems like this an undescribed species. I found 2 similar ACT observations by Donald Hobern on iNaturalist: https://www.inaturalist.org/observations/20308726 https://www.inaturalist.org/observations/7409917 I can't find a match in BOLD, either named or unnamed. I can't see a match in Canberra NatureMapr either. 30 seconds to observe and photograph, 4 hours to not be able to ID :(

4 comments

ibaird wrote:
   30 Jan 2024
Idaea (genus) is not well represented on Canberra NatureMapr, but great work.
WendyEM wrote:
   3 May 2025
Idaea iodesma
https://bie.ala.org.au/species/https://biodiversity.org.au/afd/taxa/8eb20822-1ee8-4a67-bd97-d9f1819dab05#names
https://bold-au.hobern.net/specimens.php?taxid=141804
https://inaturalist.ala.org.au/observations?verifiable=true&taxon_id=711772&place_id=6744&preferred_place_id=6744
ibaird wrote:
   7 May 2025
I agree with Dianne, this sighting looks identical to Don Hobern's two sightings on iNaturalist at Aranda ACT identified as 'Idaea (genus)'. There is no dark 'collar' and the there is a strong reddish costa. Whereas most set specimens I can clearly see on Bold seem to have a clear dark collar and lack the reddish tinge along the costa.
ibaird wrote:
   7 May 2025
Perhaps the species is sexually dimorphic. I have created the species I. iodesma for the field guide Taxonomy but I'm not sure this sighting is that species. I further note the most sightings to date of I. iodesma on iNaturalist and the ALA are from northern coastal NSW and SE Queensland.

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Additional information

  • 12mm to 25mm Animal size
  • Alive / healthy Animal health

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