Idaea iodesma
A Geometer moth (Sterrhini at Undefined Area
Identify this sighting
| Idaea iodesma | donhe | 7 May 2025 | |
| Idaea iodesma | WendyEM | 3 May 2025 | |
| Idaea (genus) | ibaird | 30 Jan 2024 | |
| Idaea (genus) | DianneClarke | 30 Jan 2024 |
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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
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
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
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.
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.
Location information
- Places Jerrabomberra, NSW
Sighting information
- 1 Abundance
- DianneClarke Recorded by
- 12mm to 25mm Animal size
- Alive / healthy Animal health
Collections
- DianneClarke NatureMapr Canberra & Southern Tablelands Geometer moths (Geometridae) Moths (Lepidoptera) Insects Idaea iodesma
Species information
- Idaea iodesma Scientific name
- A Geometer moth (Sterrhini Common name
- Not Sensitive
- Local native
- Non-invasive or negligible
- External link More information
Record quality
Quality score
4 / 7
- Images or audio
- Verified by an expert moderator
- Description
- Additional attributes
- More than one media file
- Nearby sighting(s) of same species
- GPS evidence of location