Observation 62528: Helicogloea langerheimii Pat.
When: 2011-01-18
(38.0° -122.0° )
Herbarium specimen reported

Notes: This is a jelly-like resupinate on wood of coyote bush. It has an “auricularioid” basidium, and it starts with a little sac-like structure to the side of what will become the mature metabasidium.

This is the second collection of this species from Pt. Reyes. The first I called Helicobasidium, but really didn’t spend the time to look at it closely. You can see it here: http://pmb.berkeley.edu/~bruns/tour/mycoblitz2.html. After spending more time with this collection I think Helicogloea is more likely because the basidium is straight and seems to originate from probasidium with a sac-like appendage. Also now that I have read a little more, I don’t think Helicobasidium would be as jelly-like. Achroomyces (Platygloea) is similar but lacks the sac-like appendage to probasidium. Using Chen and Oberwinker’s 2000 key it seems to fall near H. langerheimii and H. variabilis. The spore size fits the latter better, but that species is known only from S. America, so I’ve gone with the more commonly applied name. It may be something different, however. Another image of it from Europe looks similar to this http://www.mycokey.com/...

The key to looking at this specimen was that I kept it wet with paper towels overnight and had it spore-print onto a glass slide. When I looked at this fresh material it was easy to find mature basidia and repeating spores. After drying it was hard to find the specimen at all, as it dried down to a thin, transparent film, and when I looked it the dried material microscopically I only found probasidia.

I have cultures of it now derived from spore drops onto MMN agar. It initially grew as a very sparse, almost invisible mycelium, but has become a little more dense and fluffy with time (or mating?).

The wood that it is on does seem to be colonized by some short of Xylariaceous ascomycete. It is possible that this is its host rather than the wood. Apparently mycoparasitisim is common in Achroomyces. I’m not clear whether that is also true for Helicogloea. The wood was very well decayed, and as Davin noticed from the photo, infested by termites.

Species Lists

Images

131717
This is the collection, when it was fresh. The yellow tag is about 4 centimeters
131718
What I am interpreting as a sac-like probasidium is in the center to the lower side of what will become the metabasdium
131719
closeup of one of these sacs
131720
closeup of one of these sacs
131721
hyphae are clampless, right-angle branched, and with a constriction at the branch point.
131722
mature metabasidium with spores
131723
repeating spore
131724
repeating spore
131725
Mature metabasdium
131726
closeup of fruitbody
131727
closeup of fruitbody

Proposed Names

55% (1)
Eye3 Eyes3
Used references: Fungi without Gills Ellis and Ellis, and Baker (1936) Annals of the Missouri Botanical Garden, Vol. 23, No. 1 (Feb., 1936), pp. 69-112+114-128
Based on microscopic features: sac-like probasidium, elongate, septate basidium, repeating basidiospores, lack of clamps, lack of septa in spores, number of septa in basidium. Color of basidiocarp.

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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Termite
By: Darvin DeShazer (darv)
2011-01-19 20:27:17 PST (-0800)

Is this a termite fungus? Or is it just coincidence that there’s one on photo 131717 (first one with yellow tag)
Nice write-up for this strange fungus!

Created: 2011-01-19 11:45:20 PST (-0800)
Last modified: 2011-01-27 11:30:11 PST (-0800)
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