Isn't that hive beetle. Doesn't look like brood comb.
welllllll now.... THAT seals the deal, so to speak.
Newbees also can now dismiss ramblings from your desk in followups.
For your edification Bro' that there is a combination of WM anchor
weavings and WM dung.. on foundation sheet. It can happen in loose
wrapped stacks of new foundation left stored, still "safe" to use
regardless.
Hoping that helps ya out, my man.
Bill