This looks like a carcass any ideas?

I was recently checkin up on the girls and noticed a little tiny almost unnoticeable brown dot on my main stock, it came off rather easily and I put it on paper and grabbed my microscope.
I use a neem solution on my plants every three to four days(always lights off) and combine with sticky traps some Z9, peroxide bathes once a week for my roots, and my nematodes I have successfully eradicated a fungus gnat infestation I faced recently but have come to notice more than one of these tiny brown almost globe shaped to the human eye on the sides of my stocks.
I apologize in advance for the pictures as they are through my microscope which is hard to get a decent pic through, unfortunately I'm an idiot and didn't think to take a pic of it on the plant (not that youd really see it) before taking it off to investigate. Looks to me like an casing or a carcass not sure of what I only see the occasional house fly in my tent and I check my plants top to bottom at least once a day. What do you think and should I be concerned? I haven't seen any real stall in growth but I do have a couple leaves that look torn and tattered and cannot seem to find the culprit other than that healthy happy girls none the less20180809_203304.jpg

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