Sorry, double posting. See below.

The one in Paulding county is mine, and given the location, it seems out of range for bordeloni. That area is northern Piedmont right at the Appalachian Plateau transition, pretty far from the Coastal Plain region. And I don't recall ever seeing River Birch in the area, just Paper Birch. So I suspect that specimen is pretty solidly ferruginea.

Yes, I was wondering about the elevation and the vegetation. I am in the lower Piedmont of NC, not the coastal plain. However river birch is common in damp areas (most of Durham, for instance) and is also planted as a landscape tree. Both of my records were adjacent to cultivated river birches.
Might be fun to get specimens from these areas next year and see if they can be sent for barcoding.

I'm definitely going to try to collect some next year for sequencing. I suspect that bordeloni will feed on other birch species, so I'm curious if the distribution is more elevation related. If they were a true coastal plain species, that would make it much easier, but if they do filter out through lower piedmont areas, that could complicate it a bit.

See my comments below under the subject Hosts. I think that it is more complicated and I would not be surprised if there were another species involved. I am guessing about the BINs groups at BOLD.

I looked at images here and picked out those that resembled P. bordeloni as identified so far and found several other candidates--all with southern locations. I will move them if you want, but I was going to leave that to those with expertise.
Henderson, Chester County, Tennessee (series of several observations),


Douglasville, Paulding County, Georgia


Fairfield, Wayne County, Illinois (southern Illinois)

I moved what I though was supported well. I saw the submissions you mentioned and intended to ask about host plants. I assumed the Georgia record is good per Jason's comment below posted at the same time as yours and I see that as I write, he reconfirmed. I think Ken's are more likely to be bordeloni. He can sort this out himself. I posted a comment on the submission page for the first thumbnail you posted above. You might subscribe to it. Feel free to follow up with Steve Scott on his Illinois record.

Keep in mind that both species feed on river birch. Per the MONA, there is known overlap at the southern end of the range for ferruginea in northern Georgia and western North Carolina and there is a record of bordeloni from northeast Missouri.

This is the species that was recently elevated, right? Do we have any recent references for distribution and what not? It looks safe to say that southeastern specimens are bordeloni, so I'll need to revisit mine.

Yes, this was previously regarded as ferruginea. "Peridea bordeloni is the southern Coastal Plain species, which feeds on Betula nigra, the only birch in the region." - David Wagner (pers. comm. 9/5/2019). The range map in the new Notodontidae MONA shows ferruginea along the Appalachians as far south and northern Georgia. It is absent in south central and southwest Virginia and south. Bordeloni is found throughout North Carolina but no further north. Ferruginea gets as far south as southwest Arkansas at the western end of its distribution. The range maps do not show either species in Indiana, western Kentucky or western Tennessee. The host for bordeloni is river birch. The host for ferruginea is gray birch, paper birch and presumably yellow birch (at high elevations) and river birch (at mid elevations where the others are not present).

Bordeloni looks like a muted ferruginea. See George Smiley's photo 1719028 and Mark Dreiling's photo 120577. Patrick's two examples are not typical of either species in appearance but they do look like DNA barcoded specimens from near by which appear to be in the BIN group for bordeloni. The BIN also contains specimens which are more typical.

I don't know what Cotinis' linked image below is but the identification seems reasonable.

That's exactly the info I was looking for, thanks. That definitely helps. None of my specimens were found in the coastal plain region, nor do I recall any River Birch being in my areas, so that makes it easier. Thanks again for the details Steve.

This is very interesting. I am going through my old files and I am wondering if some of my other images might be this species. This, for instance, was identified as angulosa. Is that correct, or is this another bordeloni? Thanks for any help you all can give me:

OK, I'll move to prominents. Darn, that's what I thought initially, then changed my mind.

Patrick Coin
Durham, North Carolina

This is a Peridea ferruginea.