A geometer or looper moth at Theodore, ACT
Identification history
| Dichromodes ainaria | 9 Dec 2020 | GlennCocking | ||
| Dichromodes ainaria | 1 Dec 2020 | owenh |
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8 comments
owenh
wrote:
1 Dec 2020
Greetings gents, many thanks for looking at this one. May I ask for a reconsideration of confirmation please. Specimen matches images for D. ainaria (Common Heath Moth) on both ALA and MoV4 CD p2/2. MoV also records that D. oriphoetes, (also known as the Alpine Heath Moth), is particularly from the Mt Kosciuszko area. Sighting was recorded amongst a Kunzea ericoides and heathy area on the lower slopes of the Tuggeranong Hill Nature Reserve - not an alpine site.
ibaird
wrote:
2 Dec 2020
Thanks Owen for your considered query. Upon reflection I agree with you that unless we have a better diagnostic basis, the balance of probabilities is that this specimen would just as likely be D. ainaria given that the to species in question are so similar in appearance and that Tuggersanong Hill ecologically speaking, is not a high alpine location ( ie its not at the limits) of tree growth). I am not able to reliably distinguish the two species on their appreance alone, however my colleagues may be in a better position to do so. I therefore re-open the identification for my fellow moth modertors' condideration. I also acknowledge that ALA records may not be peer reviewd,
donhe
wrote:
2 Dec 2020
The main superficial difference between the species is the presence or absence of a dark marginal band to the hindwings. The hindwings are not visible in this photo, so basically we cannot reliably tell which it is.
Another superficial difference is that the lines on the forewings of D. oriphoetes have a higher contrast against the background colour than do the lines on the forewings of D. ainara.
This was the basis of my original determination as D. oriphoetes, but contrast is a variable character and not reliable.
So using location: previous sightings labelled D. oriphoetes on CNM have been in Namadgi National Park. Is this as Alpine as Tuggeranong Hill Nature Reserve ?
Another superficial difference is that the lines on the forewings of D. oriphoetes have a higher contrast against the background colour than do the lines on the forewings of D. ainara.
This was the basis of my original determination as D. oriphoetes, but contrast is a variable character and not reliable.
So using location: previous sightings labelled D. oriphoetes on CNM have been in Namadgi National Park. Is this as Alpine as Tuggeranong Hill Nature Reserve ?
owenh
wrote:
2 Dec 2020
Ian/Don, thank you for looking into this. Am also very aware of the difficulty the moderators often face determining species from photo's alone.
Don fyi: Very basically, THNR is a 365 hectare nature park of largely dry woodland/open forest (environment ACT) and old cleared 'paddocks' etc partly bordered by suburban Canberra. The moths were sighted at approx 750m asl. On the other hand Namadgi National Park forms part of the Great Dividing Range and is some distance away.
Don fyi: Very basically, THNR is a 365 hectare nature park of largely dry woodland/open forest (environment ACT) and old cleared 'paddocks' etc partly bordered by suburban Canberra. The moths were sighted at approx 750m asl. On the other hand Namadgi National Park forms part of the Great Dividing Range and is some distance away.
ibaird
wrote:
2 Dec 2020
I also point out that the MoV authors said they expected D. oriphoetes to be found to be more widespread in sub-alpine as well as sub-alpine environments. The other three CNM sightings are relatively high contrast except ter first which was at Mt Tennant at 733 m.
ibaird
wrote:
2 Dec 2020
Looking at the preserved specimen records in detail on the ALA is interesting. The holotype dated 7/12/1922 from Kosciousko NP with a relatively imprecise geographic location by today's standards but giving a modelled altitude of 1118m. 5 records from Namadgi NP 11/12/2013 (Britton and G. Cocking) 'Sphagnum bog below summit of Mt Murray', modelled altitude 1633m. One sight record from Armidale Tablemands (Nick Lambert, iNaturalist) which shows high contrast markings at 807 m. altitude.The two high contract records on CNM are from Mt Bimberi at altitude, but I don't have an altitude figure. The first record on CNM is relatively low contrast and is from the slopes of Mt Tennant at 733m. On this basis I suggest that first CNM record has a stronger case for its ID to be reviewed., but as we recieve more sight records a better picture will hopefully emerge.
GlennCocking
wrote:
9 Dec 2020
Although some oriphoetes have a fw pattern like ainara, this one looks more like ainara to me, and the location strongly prefers ainaria.
Location information
- Coordinates 149.121551-35.457698
- Maps Tuggeranong Hill
- Places Theodore, ACT
Sighting information
- 4 - 15 Abundance
- 13 Oct 2020 09:52 AM Recorded on
- owenh Recorded by
-
Collections
Insects Moths (Lepidoptera) Geometer moths (Geometridae) owenh Canberra & Southern Tablelands NatureMapr
Additional information
- 12mm to 25mm Animal size
Species information
- Dichromodes ainaria Scientific name
- A geometer or looper moth Common name
- Not Sensitive
- Local native
- Non-invasive or negligible
- Up to 1463.3m Recorded at altitude
- Machine learning
- External link More information
Record quality
- Images or audio
- More than one media file
- Verified by an expert moderator
- Nearby sighting(s) of same species
- GPS evidence of location
- Description
- Additional attributes
