Observation 194082: Cheilymenia theleboloides (Alb. & Schwein.) Boud.

When: 2014-12-19

Collection location: 5lowershop, San Francisco, California, USA [Click for map]

Who: Danny Newman (myxomop)

Specimen available

This was found in a landscaped/garden area in urban San Francisco, CA. It is growing on woodchips and possibly a piece of dung, possibly belonging to a housecat. Some hyphae seem to possess yellow contents, particularly just beneath the hymenium. The asci are 8-spored, seemingly inoperculate with inamyloid tips. The paraphyses tips appear to be apically encrusted. No septa were observed in the spores.

also at: http://ascofrance.com/forum/32802/yellow-discomycete

Species Lists


field photo
400x melzer’s – hymenium and subhymenium with yellow-filled hyphae
1000x melzer’s – asci and spores
1000x melzer’s – paraphyses
1000x melzer’s – asci and spores
1000x melzer’s – ascus and spores
400x water – ectal excipular hairs
400x water – ectal excipular hair
400x water & congo red – larger ectal excipular cells
1000x water & congo red – larger ectal excipular cells
1000x water & congo red – smaller ectal excipular cells
1000x water & congo red – yellow-filled hyphae

Proposed Names

-59% (2)
Recognized by sight
31% (2)
Used references: Hans-Otto Baral – AscoFrance
Based on microscopic features: brownish ectal excipular setae; large ectal excipular cells
62% (2)
Eye3 Eyes3
Recognized by sight: occurrence on “decomposing woody fragments” and/or manure, gregarious and sessile
Used references: Ascomycetes in Colour. pg. 35 fig. 70
Based on microscopic features: Spores “hyaline, smooth, with very fine longitudinal striation when mature*”; asci inamyloid, paraphyses “quite slender, septate, with slightly swollen tips, which contain yellow matter. Hairs hyaline to yellowish brown, thick walled, septate, with non-rooting bases and pointed tips.”

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
It was worth a try
By: Danny Newman (myxomop)
2014-12-29 04:26:34 PST (-0800)

I still feel pretty confident in our ID.

Not much new
By: Sava Krstic (sava)
2014-12-28 20:06:49 PST (-0800)

What we left to mature got attacked by another fungus. White mycelial threads of the parasite were visible the next day and its large round spores present on all preparations I made the day or two after. I didn’t see many free spores. The largest spore I measured was 17 × 11, which should be mature enough, but even when mounted in cotton blue, there were no striations on the spores. The largest hair I saw was about 350 microns long. I saved a few microshots, but the collection is lost.

By: Danny Newman (myxomop)
2014-12-20 00:09:24 PST (-0800)

mature spores should show very fine longitudinal striations. these spores are likely immature, as none were found floating in the medium, nor were any asci open/ruptured. Sava is keeping the fresh portion of the collection in a moisture chamber, and will check for mature spores in the coming days. otherwise, all characters point to C. theleboloides.

Created: 2014-12-19 22:14:19 PST (-0800)
Last modified: 2014-12-20 02:37:09 PST (-0800)
Viewed: 136 times, last viewed: 2018-01-13 22:39:14 PST (-0800)
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