Observation 152133: Ascomycota Caval.-Sm.

When: 2013-11-13

Collection location: Northwestern Portland, Multnomah Co., Oregon, USA [Click for map]

Who: Sava Krstic (sava)

No specimen available

Fungus on a fungus on a fungus.

This is the Collybia tuberosa collection (Observation 152132), after a week in a wet chamber in my garage. I don’t really know what is this that’s growing on it; an ID attempt using “Microfungi on Miscellaneous Substrates” (Ellis & Ellis), led me to Cladobotryum mycophilum, the anamorph of Hypomyces aurantius. 1-septate conidia ~15×7 microns fit the description.

Species Lists


Nov. 15: The cap of the largest Collybia completely covered by conidiospores.

Proposed Names

45% (2)
Recognized by sight
83% (1)
Recognized by sight: Based on the microscopic images of the spores that appear to be ascii.

Please login to propose your own names and vote on existing names.

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Confidence, preservation
By: Sava Krstic (sava)
2013-11-15 12:06:27 CST (-0500)

I am no expert here and cannot give any names with high confidence. I suppose though that Hypocreales would be the correct order.

I would appreciate any advice on how to preserve this collection. Shall I dry a few infested Collybias now and let the rest stay in the wet chamber for a while longer, to see what develops?

this website says..
By: damon brunette (damonbrunette)
2013-11-15 11:26:32 CST (-0500)

http://www.ncbi.nlm.nih.gov/... varium is the anamorph of mycophllum. There are other interesting ascos in background and maybe an Exidia? that could also yield clues?

What would you call it?
By: Nathan Wilson (nathan)
2013-11-15 08:34:57 CST (-0500)

Sava- I appreciate that id’s of microfungi to species are challenging, but it would help mobilize this image out to the rest of the world if you could assign it to the lowest level higher taxon that you feel completely confident of. I threw in Ascomycota cause that seems pretty obvious based on the images. Other options based on IF’s placement of Hypomyces aurantius are: Hypomyces, Hypocreaceae, Hypocreales, Hypocreomycetidae, Sordariomycetes, Pezizomycotina.

Collybia s.s. degrade old fruiting bodies…
By: Nathan Wilson (nathan)
2013-11-15 08:27:36 CST (-0500)

typically of blackening Russula species. You can see the gills in the background.

Sava- Could you add these images to observation 152132 using the ‘Reuse Image’ option?

Fungus on a fungus on a fungus…
By: Daniel B. Wheeler (Tuberale)
2013-11-15 05:16:21 CST (-0500)

I understand the Hypomyces aurantius growing on Collybia tuberosa (fungus on a fungus), but don’t understand what fungus Collybia tuberosa was growing on. Isn’t that generally a leaf degrader?

What did I miss here Sava?

It’s a fungus (on a fungus on a fungus)
By: Sava Krstic (sava)
2013-11-14 12:36:00 CST (-0500)


I scoped some of that web and it’s fungal: conidiophores and conidia can be seen in the last two photos.


sheetweb spider
By: Matt Welter (mattfungus)
2013-11-14 08:06:49 CST (-0500)

Interesting whatever is covering the fungus, perhaps its a fungus.

However, at first impression it reminded me of webbing from spiders in the sheetweb family (linyphiidae), epecially at the base and especially when baby spiders hatch out.

Created: 2013-11-14 00:39:04 CST (-0500)
Last modified: 2013-11-15 08:31:51 CST (-0500)
Viewed: 197 times, last viewed: 2018-04-07 02:45:06 CDT (-0400)
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