Preying Mantis Ootheca

Subject:  Cocoon?
Geographic location of the bug:  Aripeka Preserve, FL
Date: 01/02/2018
Time: 06:13 AM EDT
Saw this during a recent hike in Central FL, Gulf Coast. It looks distinctive, but I’m stumped…
Thanks in advance, and happy new year!
How you want your letter signed:  Frank

Mantis Ootheca

After a bit more Googling and brainstorming, I located some photos of very similar looking structures that had been ID’d as some type of mantis egg case. Am I in the right track?

Dear Frank
Your googling provided you with the correct information.  This is a Mantis ootheca or egg case, and it looks to be that of a native species, probably the ootheca of a Carolina Mantis which is pictured on the Bug of the Week site.  The ootheca of a California Mantis looks quite similar.

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