When: 2011-08-02

Collection location: Juanacatlán de Atemajac, Jalisco, Mexico [Click for map]

Who: Alan Rockefeller (Alan Rockefeller)

No specimen available

Growing on the side of the road in cedar duff.

Proposed Names

29% (1)
Recognized by sight: Similar to C. comatus but has a long rooting stipe
29% (1)
Recognized by sight
58% (1)
Recognized by sight: Appears that C. comatus does often have a rooting stipe

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

= Observer’s choice
= Current consensus


Add Comment
By: Erin Page Blanchard (CureCat)
2011-11-27 05:48:45 CET (+0100)
By: Erin Page Blanchard (CureCat)
2011-11-27 05:16:24 CET (+0100)

C. comatus does often have a rooting stipe. I think this feature is under reported or not typically noticed. It is not always very obvious, but I found it fairly pronounced in about 50 percent of a large fruiting in Ohio, but not as pronounced as your collection. I have photos.

Also, Coprinus can be dried but if you want more structure than a dried puddle of black spores, you need to dry it when it is immature… Though I don’t know that immature specimens are best for spore microscopic analysis for different reasons than over mature specimens… If it has deliquesced than the spore mass should still be good for spore measurements and DNA extraction, and maybe you will be able to view micro features with an immature specimen, but sometimes they are underdeveloped. It would be ideal to collect a few young ones, and to dry them at different stages, but then, it would be good if you could get a single basidiome too! Maybe if you find only one immature one you can dry half of it, and wait to dry the other half when it has deliquesced.

In herbarium material have?.
By: Europe-coprinologist
2011-10-25 19:27:39 CEST (+0200)

Hello Alan.

I be very interested to study some examples such as the photo. Right now we are working on an article on the distribution of the genus Coprinus sensu stric. around the world. This species is only known in Tunisia, Algeria, Morocco, Syria and Spain. It would be very interesting to study these specimens of mexico, and check whether they are indeed the same species as that of Africa and Europe. It would also be possible that turned out to be an undescribed species. If you send me the material I could analyze DNA sequences. My e-mail: coprinologist@hotmail.es Please contact me. Thank you.Sorry for my bad English.
By: Alan Rockefeller (Alan Rockefeller)
2011-10-25 17:44:27 CEST (+0200)

When I first found this, I thought the pseudorhiza was unusual. But my Mexican friend said he found them with pseudorhiza all the time and it was normal, so I didn’t collect it. When I added the pictures and did some research I realized that it is not normal for C. comatus, and went back to recollect a couple times without success. It is right on the corner of a road near where my friends live so I will definitely recollect it, but probably not until next year.

Let me know if you want the dried sample when I find it again. If it is even possible to dry this species…

Coprinus arenarius Pat.,
By: Europe-coprinologist
2011-10-25 17:26:34 CEST (+0200)

Hi, Alan.

The specimens that you put in the photos seem to correspond morphologically to a European species typical of dry areas, Coprinus arenarius Pat., Expl. sci. Tunisie 4: 2 (1896). This species is easily identified by its large spore size (14-20), and rhizome evident.

This species has been mistakenly identified for a long time the species Coprinus ovatus (Schaeff.) Fr In the citation you give, in my opinion, there are also classification error. I think Coprinus arenarius is not quoted in America. It would be interesting to reassess the collection.