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Photo#97270
Pytho planus larva? - Pytho americanus

Pytho planus larva? - Pytho americanus
Nashua, Hillsborough County, New Hampshire, USA
March 1, 2007
I found a dozen or so Pytho larvae under the bark of a large downed pine. If Dr. Dan young (U. of Wisconsin) is right in his P. nig*er ID of some earlier Pytho larva finds, this one must be a different species, most likely P. planus. The spine arrangement is distinctly different between the two, the image on the right being IDed as P. niger:


This image series was intended to be part of a group shot that never happened. The following images are therefore of various individuals from the same batch of larvae.

Images of this individual: tag all
Pytho planus larva? - Pytho americanus Pytho planus larva? - Pytho americanus Pytho planus larva? - Pytho americanus Pytho planus larva? - Pytho americanus Pytho planus larva? - Pytho americanus Pytho planus larva? - Pytho americanus Pytho planus larva? - Pytho americanus Pytho planus larva? - Pytho americanus

Pytho larvae
In North America, larvae of P. americanus are easily IDd, as they are the only ones with a complete transverse row of asperities on the dorsum of the last abdominal segment, and also, the apices of the individual asperities are directed anteriorly...

Moved
Moved from Pytho planus.

Moved
Moved from Pytho.

Yes, P. planus
Dr. Dan Young, University of Wisconsin, looked at these images and confirmed they are P. planus.

 
Pytho nomenclature
Due to a nomenclatural matter (homonymy), the name for the metallic adult Pytho is now back to P. americanus Kirby. Also, the larva of P. americanus is the only one on which the apices of the small asperities along the urogomphal plate point anteriorly...

 
Let me be sure I'm following you.
There are two colors that were associated with P planus: metallic blue or green and a plain brown. Are you saying that now the metallic colored adults are recognized as a distinct species (P. americanus) from the brown ones, which are still P. planus?

If there are now two species, does adult dissection bear this out or is the coloration the only adult difference?

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