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Stigmatomma trigonignathum vs. Stigmatomma pallipes


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#1 Offline VenomousBeast - Posted May 18 2020 - 2:42 PM

VenomousBeast

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So, I know the differences between these 2 but I recall a few years ago having a Stigmatomma pallipes colony and I also found another one that was physically smaller than Stigmatomma pallipes. I'm talking about like 2mm smaller in comparison. I tried to combine them but they didn't accept these smaller ones and I took them out. This is curious to me cause I've always been able to combine colonies with no problem. I ended up keeping them for a bit but they all died. I wish I had kept samples cause looking back it could've very well been Stigmatomma trigonignathum! Or some new species. I don't think I've EVER seen another colony since and all the Stigmatomma pallipes queens I've seen were the same size! But these were, again, 2mm smaller, also, more of a pale orange color. I'm in doubt somewhat cause Stigmatomma trigonignathum is the Rarest ant in North America, even giving it the name the Bigfoot ant. It's only been seen 2 times and both in NC. (And obviously, I'm in Virginia so there's more doubt there as well). I'd like to see what you guys think.


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Keeps:

1:Pogonomymex occidentalis

4: Tetramorium immigrans

2 Reticulitermes flavipes


#2 Offline PurdueEntomology - Posted May 18 2020 - 3:03 PM

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You will find size variations in S. pallipes.  Since S. trigonignathum has only been confirmed twice, the first 1948 holotype description then in 2008.  Both within a limited region of N.Carolina as you noted.  I would not say it is NOT impossible to have come across an as of yet undescribed species within this genus, but we would need a specimen to examine along with details of collection: date, location, habitat, collector etc.  WE being the myrmecological community.  


Edited by PurdueEntomology, May 19 2020 - 11:25 AM.

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