Observation 220747: Pholiota aurivella (Batsch) P. Kumm.
When: 2015-10-25

Notes: Growing on a fallen hardwood tree (ash?) in the “hardwood swamp” area of Cedar Bog. Spore print brown. Spores from spore print 8.5 (7.5 – 9.4) x 5.0 (4.4 – 5.4) µm

Spores measured:

8.5 × 4.4 µm
8.5 × 4.6 µm
7.6 × 4.9 µm
8.9 × 5.3 µm
8.1 × 5.3 µm
8.6 × 4.8 µm
8.3 × 5.0 µm
7.5 × 4.9 µm
8.1 × 4.8 µm
8.5 × 5.2 µm
8.8 × 4.6 µm
8.0 × 5.1 µm
8.2 × 5.3 µm
8.9 × 5.4 µm
8.6 × 5.1 µm
8.6 × 5.1 µm
9.1 × 5.2 µm
9.2 × 4.7 µm
7.9 × 5.1 µm
9.4 × 5.2 µm

Proposed Names

-28% (1)
Used references: Mushroomexpert.com
Based on microscopic features: spore size
46% (2)
Eye3 Eyes3
Recognized by sight
Based on microscopic features

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

Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

Add Comment
It should
By: Alan Rockefeller (Alan Rockefeller)
2015-10-28 09:38:46 PDT (-0700)

Because when things don’t mate, the DNA sequences start to drift apart over time.

Mating compatibility.
By: Dave W (Dave W)
2015-10-27 14:30:15 PDT (-0700)

Miller states that aurivella and limonella are mating incompatible. Does existing data support a hypothesis that mating compatibility correlates with DNA evidence?

Spore size reports:
Miller. aurivella 8.5-10.2 × 5-6.5, limonella 6.5-9.3 × 3.7-5.6.
Roody. aurivella 7-10 × 4.5-6. No mention of limonella.
Lincoff. aurivella 7-10 × 4.5-6. “Limonella has narrower spores.”
Champignons du Quebec. aurivella 8-11 × 6-7, limonella 6.5-7.5 × 4-5.5.

Spore size
By: Alan Rockefeller (Alan Rockefeller)
2015-10-27 11:27:34 PDT (-0700)

I am not sure how much spore size really matters. Does the spore size correlate to mating compatibility or DNA sequences?

Sometimes people publish a new species because they find spores outside of the supposed range – often the people who publish the range didn’t check lots of collections, or measured spores from the gills which were not yet mature.

Yeah
By: Django Grootmyers (heelsplitter)
2015-10-27 11:08:47 PDT (-0700)

I was pretty confused on this one. Pholiota aurivella does seem like a better fit though. The largest spore in the picture is one of the measured spores. I measured from other pictures too, but I only uploaded the one.

Spore size for P. limonella…
By: Dave W (Dave W)
2015-10-27 10:14:18 PDT (-0700)

Champignons du Quebec lists 7.5 mu as maximum spore length for limonella. Mushroom Expert lists the maximum length as 9 mu. Either way Django, some of your measurements exceed 9 mu, and in the photo I think I see one that’s a fair amount larger than the others. Spores I have observed for collections I IDed as aurivella have shown a few significantly larger ones mixed in with the majority 7-8.5 lengths.

For a recent observation I posted as limonella, some spore lengths appeared to exceed 8 mu, but not by much.

Seems to me there may truly be both small and large spored “Golden Pholiota” species. But this concept does appear to encompass a “gray area” of spore size.

Created: 2015-10-27 01:22:42 PDT (-0700)
Last modified: 2015-10-27 11:14:06 PDT (-0700)
Viewed: 39 times, last viewed: 2016-11-05 21:53:12 PDT (-0700)
Show Log