Observation 128248: Genabea Tul. & C. Tul.
When: 2013-02-10
No herbarium specimen
0 Sequences

Found hypogeous in Quercus ilex, looks like macroscopicaly with Genabea sp., but it seems to be maybe Zygomycetes.

Proposed Names

26% (1)
Based on microscopic features
28% (1)
Based on microscopic features: Spores seem to be about 18 µm.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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Color is white, but with pink hue.
By: Daniel B. Wheeler (Tuberale)
2013-02-13 21:56:36 CST (-0500)

Spore resembles Genabea, has classic outer layer 1-2 microns thick, with subtle exterior ornamentation. But slightly larger than Genabea cerebriformis.

Genabea cerebriformis rarely over 1 inch in diameter: more frequently 1 cm diameter; is hollow, convoluted and minutely warty with many chambers.

probably not Genabea
By: Kaounas Vasilis (bkaounas)
2013-02-13 04:25:57 CST (-0500)

the color is white, monitor the conversation he had done earlier in the actafungorum.org


Genabea seems correct.
By: Daniel B. Wheeler (Tuberale)
2013-02-13 00:51:43 CST (-0500)

In Key to Spores of the Genera of Hypogeous Fungi of North Temperate Forests, by Castellano, Trappe, Maser and Maser, five species are known from North Temperate Forests. Four of these are rare. The genus was originally described by Tulasne and Tulasne in 1845 from Orleans, France.

Spore Characters: Ellipsoid to globose, 26-53 (-70) x 20-53 (-70) microns excluding ornamentation.

Might also be confused with Hydnotrya, which has spores 16-34 × 16-35 microns excluding ornamentation.

Based solely on spore size this would seem to be Hydnotrya.

It would seem to be a species not often collected or described. I don’t know where I would look for it in European literature.

About 12 species of Hydnotrya are known from North America, with several as yet undescribed. The sporocarp is described as “Peridium: Grayish to yellow to pink-flushed, brown, brownish purple or black, smooth or minutely scruffly.”

Berkley, M. J.; and Broome, C.E. first coined the genus in Notices of British hypogeous fungi. (Ann. Mag. Nat. Histor. 18-73-82; 1846)

So, spores of this appear to be from Hydnotrya but the sporocarp appears to be Genabea.

probably not Genabea
By: Kaounas Vasilis (bkaounas)
2013-02-12 16:03:18 CST (-0500)

there was no structure peridium or asci were

By: Daniel B. Wheeler (Tuberale)
2013-02-12 13:30:10 CST (-0500)

Might be Genabea. Left photo shows pale pink sporocarp; right photo shows multiple white sporocarps. Which color is correct?

Mature Genabea usually not available until May-June.

Listed in NATS Field Guide To Selected North American Truffles and Truffle-Like Fungi as Ascomycota, Pyromemataceae. Nothing about Zygomycetes.

Created: 2013-02-10 16:11:27 CST (-0500)
Last modified: 2013-02-10 22:42:24 CST (-0500)
Viewed: 111 times, last viewed: 2017-10-20 09:24:28 CDT (-0400)
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