Observation 63612: Rickenella fibula (Bull.) Raithelh.

When: 2010-10-03

Collection location: Spodnja Idrija Region, Goriško, Slovenia [Click for map]

46.03697° 14.02205°

Who: amadej trnkoczy (amadej)

No specimen available

Code: Bot_463/2010_DSC5318

Habitat: extensively used grassland, flat terrain, on overgrown river deposits terrace, humid air, full sun, exposed to direct rain, average precipitations 2.000-2.600 mm/year, average temperature 8-10 deg C, elevation 320 m (1.000 feet), borderline between prealpine and Dinaric phytogeographical region.

Substratum: soil, among mosses.

Place: Near confluence of rivers Idrijca and Gačnik, right bank of river Idrijca, close to Spodnja Idrija town, Goriška, Slovenia EC

Comments: Growing gregariously, pileus diameter about 6-8 mm (0.2-0.3 inch).

Nikon D700 / Nikkor Micro 105mm/f2.8

Proposed Names

61% (2)
Eye3 Eyes3
Recognized by sight
Used references: (1) Personal communication with Mr. . Id’ed by Mr. Bojan Rot, www.gobenabovskem.si
(2) R.M. Daehncke, 1200 Pilze in Farbfotos, AT Verlag (2009), p 178 .
(3) M.Bon, Parey’s Buch der Pilze, Kosmos (2005), p 128 .
(4) http://www.mushroomexpert.com/rickenella_fibula.html .
Based on microscopic features: Spore dimensions: 4.4 (SD = 0.3) x 2.4 (SD = 0.2) micr., Q = 1.85 (SD = 0.15), n = 26. Motic B2-211A, magnification 1.000 x, oil, in water.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
better fit of spore dimensions
By: amadej trnkoczy (amadej)
2017-12-30 12:56:21 CST (-0500)

Thank you Jacob for your proposal. I decided for R. fibula based on spore dimensions. Measured ones fit better to R. fibula than to R. mellea. Ref:
states for R. mellea 5,2-7.1 / 2.7-3.6 microns, which is too big for what I’ve measured (4.4 / 2.4 microns in average). The cited reference states for R. fibula 3-4 / 1.5-2.6 microns, which is admittedly not a perfect fit to my measurements but certainly much closer to R. fibula then to R. mellea. What arguments you believe speak in favor of your proposal?

Created: 2011-02-18 17:00:00 CST (-0500)
Last modified: 2017-12-30 12:56:22 CST (-0500)
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