Midsummer Tiger Swallowtail

[Steven Daniel]

Hi all,

A couple of friends have sent me this recent paper which helps a lot to sort out the tiger swallowtails we often see in July.  Though folks in the Finger Lakes will still have two July fliers to contend with. https://zookeys.pensoft.net/article/142202/

Mourning cloaks and commas will be out of their winter slumber before too long!

Steven Daniel

[Meena Madhav Haribal]

Thanks Steven! I think Feeny lab group in 80s and 90s worked on the Papilio glaucus group. 

This current paper is a thorough job it looks. I liked it. Now I will have to go through all my Papilio pictures to see If I can identify them. Newly separated species seems to be collected from Ithaca area too. 

I will keep my eyes open this summer.

Cheers

Meena 

Meena Haribal

Ithaca NY 14850

42.429007,-76.47111

http://meenaharibal.blogspot.com/

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From: nyl...@googlegroups.com <nyl...@googlegroups.com> on behalf of Steven Daniel <nat...@gmail.com>
Sent: Sunday, February 16, 2025 10:00 AM
To: nyleps <nyl...@googlegroups.com>
Subject: [nyleps] Midsummer Tiger Swallowtail

 

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[Harry Pavulaan]

Steve, all:

I suppose I should have sent copy of a paper I had published last year, describing Pterourus bjorkae from southern New England.  The authors of the Midsummer Tiger Swallowtail were somewhat hasty in summarizing P. bjorkae (New England Tiger Swallowtail) while in review, without apparently digesting everything I laid out, given the short time (weeks) between our separate papers, much of it based on the historic work of Mark Scriber's team and associates.  Of note:  read my account of P. glaucus in southern New England.  Glaucus does NOT produce univoltine populations, though lab specimens of any multivoltine swallowtail are capable of being univoltine.  "True" glaucus is bivoltine or multivoltine.  

The Finger Lakes population of Tiger Swallowtails was previously determined to be two univoltine populations, a spring flight and a summer flight, with DNA of each being different from glaucus (Hagen & Lederhouse, 1985), but similar to each other.  The early population in the Finger Lakes region is likely not canadensis, rather bjorkae.  Thus, I laid out a comparison of sympatric, bivoltine P. glaucus and P. bjorkae in Rhode Island.  One only needs to see the images to see the obvious difference.  That was apparently missed.  Glaucus populations, even those in the highest, coldest elevations of West Virginia, produce two broods annually.  In any event, I'm attaching a link to my paper for reference.  

https://digitalcommons.unl.edu/taxrpt/91/

"Determination of a New Spring-flying Species of the <i>Pterourus glauc" by Harry Pavulaan The Pterourus glaucus complex in three southern New England states is analyzed for cryptic speciation. What was historically considered to be one species, P. glaucus (Linnaeus, 1758), was recently split to separate P. canadensis (Rothschild & Jordan, 1906) at species rank (Hagen et al., 1991). Additionally, P. appalachiensis Pavulaan & Wright, 2002, was described as an Appalachian Mountain ... digitalcommons.unl.edu

Much of my assessment of glaucus not being able to survive the interior New England winter applies to the Finger Lakes region as well, and lays out a scenario where two species might be present around Ithaca in summer.  Glaucus appears to be a seasonal, summer migrant in upstate New York and all of interior New England.  So before anyone can assume P. bjorkae is a synonym of glaucus or canadensis, they need to run the same DNA analysis used to identify P. solstitus first.  Specimens were sent to the Grishin lab but I'm awaiting results.

Harry

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From: nyl...@googlegroups.com <nyl...@googlegroups.com> on behalf of Steven Daniel <nat...@gmail.com>

Sent: Sunday, February 16, 2025 3:00 PM

To: nyleps <nyl...@googlegroups.com>
Subject: [nyleps] Midsummer Tiger Swallowtail

 

Hi all,

A couple of friends have sent me this recent paper which helps a lot to sort out the tiger swallowtails we often see in July.  Though folks in the Finger Lakes will still have two July fliers to contend with. https://zookeys.pensoft.net/article/142202/

Mourning cloaks and commas will be out of their winter slumber before too long!

Steven Daniel

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