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Bizarre Red Velvet Mite In The Genus Trombidium

in steemstem •  3 months ago

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The search for mushrooms sometimes turns up strange things - and this is no exception.

The Red Velvet Mite, a member of the genus Trombidium, is about the brightest insect I have ever seen in real life. We saw this thing crawling around from five feet away, even though it was only a few millimeters in size.

Except, The Red Velvet Mite is not an insect at all, but a "true mite." That means it is an Arthropod - specifically it is part of the Arthropoda phylum, in the subphylum Chelicerata, along with spiders and ticks. Like spiders and ticks, this creature has a chitinous external skeleton, and a segmented body, most apparent here by looking at the leg joints.

This first photo is my favorite and really captures the strange, downy - dare I say velvety - hairs covering the mite's underside and legs, as well as highlighting clearly all eight appendages and two smaller graspers by its mouth.

Here's the bugger right side up.

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It's hard to get depth of field right with macro on a moving target.

However you can get a better sense of what the topside of the mite looked like by watching it in action below:

Although I've never seen a clover mite before, they are apparently considered pests.

At first, I thought this was a Clover Mite, or Bryobia praetiosa, but then I realized this is **way too big ** to be a clover mite.

Some more internet sleuthing turned up a much weirder possibility that this was a Red Velvet Mite and, after finding two posts in the awesome Bugguide.net website that fit the bill perfectly and had been vetted by the community there. I feel confident this is a North American Red Velvet Mite in the genus Trombidium.

These guys apparently play an important role, along with a host of other critters, in decomposing organic material that falls to the forest floor. Humorously, to me, their diet actually includes fungi, in addition to a plant material and bacteria, and some species can live to several years old.

When we were done photographing this mite, we made sure he made it safely off the trail back into the wilderness, where he no doubt continues to do his important work sustaining the local ecosystem.


Photos are my own

Info Sources:

  1. Penn State College Of Agricultural Sciences
  2. American Pest On Clover Mites
  3. Insectidentification.org on Giant Red Velvet Mite
  4. Bug Guide Possible Trombidium, red velvet mite?
  5. Second Bug Guide ID placing in Trombidium genus
  6. Wikipedia on the subphylum Cheicerata
  7. Wikipedia on the Trombidiidae
  8. cirrusimage.com on Red Velvet Mite
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Wow! It looks bigger than any mite I've heard of...I thought all mites were <1mm in size. How does one distinguish a mite from a tick?

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that is a great question I don't know off hand - i think it has to do with diet, blood/plants fungi bacteria. Maybe leg number.

Also i dont think there are any ticks lookin anything like this big red thing :)

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It's so soft and fluffy, I just wanna poke it in the belly.

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Right? Also kind of horrifying in a way - it kind of floats in between good and bad.

What an amazing creature. It looks like a mutantly giant version of bloodsuckers in England. They might also be clover mites but I recall the bloodsuckers from my memory to be wayyyy smaller, like barely perceptible and walking around in groups... curious

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The video was a great addition. Wish you could do it more often with the mushrooms, but that requires timelapse (which you did at least once that I recall).

So how does this survive with such a conspicuous color? Usually color is an advertisement for poison, but I guess that's not true in this case.

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I was wondering the same thing - and I don't really have an answer.

But - I found this awesome Oatmeal Comic About The Mite, which doesn't really answer your question, but it pretty fun.

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That is indeed an awesome comic! And educational. I wonder if they should teach things like that to schoolchildren. They'd be burned in their memories that's for sure.