When: 2003-01-11

Collection location: Novato, Marin Co., California, USA [Click for map]

Who: John Kirkpatrick (natashadak)

No specimen available


Not confident of the species

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= Observer’s choice
= Current consensus


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Re break up
By: John Kirkpatrick (natashadak)
2006-11-04 11:01:21 CST (-0500)

Excellent information – thanks.

Break up of Coprinus
By: Nathan Wilson (nathan)
2006-11-03 10:17:29 CST (-0500)

The genus Coprinus was broken up primarily based on DNA evidence in 2001. I can send you the full reference if you like. Fortunately there are also some good macroscopic features that can be used to distinguish the resulting groups. Based on the new evidence if Coprinellus micaceus and Coprinus comatus (the type for Coprinus) were to remain in the same genus you would have to move all of Agaricus and several other genera into Coprinus (or more likely all the Coprinus would get renamed Agaricus). The four ‘new’ genera (several of them were actually published long ago) are Coprinus, Coprinellus, Coprinopsis and Parasola. Coprinus is very small and essentially only includes Coprinus comatus and a couple of very close relatives. Coprinellus is a large group with a universal veil that breaks up into small particles like Coprinellus micaceus. Coprinopsis includes the familar Coprinopsis atramentaria (aka the Inky Cap). Here the universal veil is more stringy. Finally, in Parasola there is no universal veil. The most common representative of this genus is Parasola plicatilis.

These distinctions are not made in Arora since it was published in the late 80’s. I’ve asked Mike about why he doesn’t switch the names on his site, and he wants to make sure the name changes stick and is concerned that people won’t know the new names due to the books they are using. Initially there was some debate about how the names should be applied, but as far as I know that has mostly died down. One place you can see the new names is the http://www.speciesfungorum.org/Names/Names.asp">
Index Fungorum. There is also discussion of these changes on the Coprinus and Psathyrellaceae pages in Wikipedia. Tom Volk also talks about all this in his May 2004 Fungus of the Month page. Note that MykoWeb does list the new names as synonyms.

Re Coprinellus
By: John Kirkpatrick (natashadak)
2006-11-03 02:59:46 CST (-0500)

I noticed its use here (see index) but Arora (MD p. 348) and Mykoweb ( http://www.mykoweb.com/CAF/species/Coprinus_micaceus.html
) use Coprinus. Potayto/Potaato?

Species seems reasonable, but the genus…
By: Nathan Wilson (nathan)
2006-10-26 12:39:45 CDT (-0400)

should be Coprinellus. In my experience C. micaceus often looks like this in rainy weather. The characteristic mica-like grannules get washed off pretty easily.