Observation 161340: Gymnopus (Pers.) Roussel
When: 2014-01-01
No herbarium specimen

Proposed Names

28% (1)
Eye3
Used references: Synonymy: Collybia neotropica
http://www.landesmuseum.at/... and REPORTES NUEVOS DE AGARICALES PARA PANAMÁ , Meike Piepenbring, Universidad Autónoma de Chiriquí (UNACHI). http://www.cobiopa.org/... (3. Collybia neotropica , Fig.4) AND http://www.biologydir.com/...
56% (1)
Eyes3
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus

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discrepancies
By: Danny Newman (myxomop)
2015-02-22 15:12:20 PST (-0800)

In the article of hers you cite, Dr. Piepenbring remarks in the notes for C. neotropicus that the identification is preliminary, and that no monographic treatment exists for the group’s Neotropical members:

La identificación es preliminar ya que en el trópico hay muchas especies de Collybia y no existe ninguna monografía para identificarlas con seguridad.

The same can rightfully be said for Marasmius, Marasmiellus, and Gymnopus as well, if not most all other saptrotrophic, white-spored Neotropical agarics, as so many former Collybias have been moved to those and other genera.

There is also a discrepancy between the stipe colors seen in Lius Mata’s image (http://www.biologydir.com/...) and those of Dr. Piepenbring’s article. One shows a mushroom with a smooth, cream-colored stipe, the other being considerably darker and possibly frosted with caulocystidia or some such ornamentation (the image is much too small to say for certain). The description in the Sydowia article describes the stipe as “concolorous with the lamellae, but pale grayish-cinnamon and finely velvety toward the base,” which would lend some credibility to Dr. Piepenbring’s preliminary determination if she had either a description of the stipe or a photograph which showed the stipe base. Alas, there is neither.

Lastly, this taxon was described from mid-elevation Bolivian Yungas forest, probably in the vicinity of 1500m/5000ft above sea level, which is not an insignificant difference in habitat from lowland Brazilian rainforest.

All of this to say that Gymnopus or Marasmiaceae is probably the best name for this until or unless someone more knowledgeable decides to weigh in and/or a specimen can be obtained for microscopic study.

Created: 2014-03-14 11:44:05 PDT (-0700)
Last modified: 2015-02-22 15:14:59 PST (-0800)
Viewed: 81 times, last viewed: 2016-06-23 23:29:42 PDT (-0700)
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