InsectNet forum

Leonard187 wrote: Tue Dec 03, 2024 12:59 pm it seems really different with its model Atrophaneura hageni, so does it use its white triangles to mimic the white head of A.hageni?

Exactly, and the silvery hindwings mimic the female of Atrophaneura nox in Sumatra. It's a case of two different warning patterns combined in the same mimic, sort of like the flashing lights on an ambulance telling the predator to keep away.

Leonard187 wrote: Tue Dec 03, 2024 12:59 pm my friend has a tailed one also with white triangles which is really interesting, though I think it should also mimic L. coon.

I seem to remember this came from W Sumatra, where the yellow L. coon does not occur, but perhaps it is from S Sumatra, where L. coon is found in the far south. The pale hindwing spots (even though in the wrong position) combined with the white 'head' sends two signals.

Leonard187 wrote: Tue Dec 03, 2024 12:59 pm Is picture 3 named as f.anura? It is not really seems like a Troides spp.

No, form anura is rather different to this, although the hindwing markings are in a similar position, but they are cream tinged with orange (I suppose this may look bright yellow in flight), the underside is creamy with large black spots (like the Troides female) and it comes from Mt. Kinabalu, Borneo, not Sumatra.
I think this Sumatran form is actually derived from the originally tailed form which has lost the tails (note the pale sides to the abdomen), and it may well mimic a Troides female too. Basically this means the gene to include tails has been 'switched off'.

Adam.

adamcotton wrote: Tue Dec 03, 2024 7:54 pm I seem to remember this came from W Sumatra, where the yellow L. coon does not occur, but perhaps it is from S Sumatra, where L. coon is found in the far south. The pale hindwing spots (even though in the wrong position) combined with the white 'head' sends two signals.

No, form anura is rather different to this, although the hindwing markings are in a similar position, but they are cream tinged with orange (I suppose this may look bright yellow in flight), the underside is creamy with large black spots (like the Troides female) and it comes from Mt. Kinabalu, Borneo, not Sumatra.
I think this Sumatran form is actually derived from the originally tailed form which has lost the tails (note the pale sides to the abdomen), and it may well mimic a Troides female too. Basically this means the gene to include tails has been 'switched off'.

Adam.

Thanks, but pic2 is from S Sumatra based on the label.
About f.anura I only saw pictures from the paper of sir Clarke as well as you posted previously (really have yellow abdomen), and I donot know where this one (pic 3 of I posted above) collected from >-<
BTW, today on website, I've seen a specimen picture of ssp. oceani from remote Enggano island of Indonesia, and this female one seems rather similar with male. So whether we can suppose that this island might be the origin location of memnon which showed monomorphic of male/female?