Observation 198720: Stigmatella

When: 2015-02-13

Seen at: Donalds, South Carolina, USA [Click for map]

Who: Kim Fleming (myriorama)

No specimen available

Found several clusters like these under the loose bark of a rotting log. Some attached to the log and some to the inner bark. I didn’t think these were a slime mold but did have it confirmed with a myxomycetes expert that they aren’t.

Species Lists


The ruler is marked in millimeters.

Proposed Names

28% (1)
Recognized by sight
30% (2)
Recognized by sight: Non fungal actually cluster of bacteria

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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clearly not a myxomycete in my opinion
By: Jonathan M
2015-04-10 12:01:15 CDT (-0500)

And also probably not a glomeromycete wich are usually associated with roots, i actually think those are a clade of bacteria called Myxobacteria, Stigmatella or perhaps Chondromyces come to mind.

You could post this
By: Elsa (pinknailsgirl)
2015-02-18 13:56:31 CST (-0600)

on Ascofrance…

allow me to vouch for
By: Danny Newman (myxomop)
2015-02-17 07:57:30 CST (-0600)

Kim’s stated experience with slime molds. She has been steadily contributing to the internet’s collective body of high quality myxogastria photography since before the group was removed from kingdom fungi.

As for Glomeromycota, the only macroscopic, epigeous species I am familiar with is a sort of sub-spherical growth low on the stems of living, herbaceous, Neotropical plants, whose enormous spores can be seen in cross section with the naked eye (it has been suggested that this could be Glomus macrocarpus, see Observation 191609). I see elsewhere on the site observations of G. fasciculatum, which is similarly sized and styled. Neither of those, however, resemble this organism.

Is this something you can revisit in a couple days? If it’s something not yet mature, some more time to develop would be useful in figuring out what it is.

By: Kim Fleming (myriorama)
2015-02-16 20:21:42 CST (-0600)

Someone at flickr has suggested Glomeromycota. But I don’t see that these are associated with any roots.

why not myxogastria?
By: Kim Fleming (myriorama)
2015-02-16 14:32:36 CST (-0600)

I’ve looked at thousands of myxogastria, photographed hundreds, and have been in contact with an expert over the years. I’m an amateur but this stuff just didn’t look like any myxos I’ve ever seen before. The stalks don’t seem right, the heads are different, the way they’re hubbed out (I don’t have the best vocabulary for it). Also, most importantly :-) the expert I know doesn’t think these are myxos. But he’s agreed to look at it if I get a dried sample to him. I got one sample yesterday but it has sort of fallen apart. They aren’t strongly attached to the wood. I can get back down there on Thursday and will try to get a better sample then. I considered some sort of eggs (like tiny snail eggs), but the stalks seem to rule that out. Not sure it’s fungal either. Thanks for looking. If you know of any myxogastria that look like this, please let me know. I’d love to get this mystery cleared up.

Why not Myxogastria?
By: Alan Rockefeller (Alan Rockefeller)
2015-02-15 14:07:06 CST (-0600)
By: Kim Fleming (myriorama)
2015-02-14 14:06:24 CST (-0600)

I don’t think these are myxogastria, and am keeping an eye on them. I found more clusters today on the same log with two sets seeming slightly more aged. Maybe I can post them later.

Created: 2015-02-14 06:06:59 CST (-0600)
Last modified: 2016-11-21 19:32:23 CST (-0600)
Viewed: 218 times, last viewed: 2017-11-20 07:22:52 CST (-0600)
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