Observation 196852: Xylaria subgenus Pseudoxylaria (Boedijn) Dennis

When: 2015-01-22

Collection location: Moreleta Kloof Nature Reserve, Pretoria, Gauteng, South Africa [Click for map]

Who: Liz Popich (Lizzie)

No specimen available

Notes:
small to medium size, finger-like appearance, black base, dirty-white upper part with minute black warts, white flesh with black inner core height 40 – 100mm, deep black “root”, growing around edges of abandoned termite nest.

Images

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IMG_3167.JPG
501187
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Enlarged surface of upper part

Proposed Names

79% (2)
Eyes3
Recognized by sight
Used references: Hsieh, H. M., Lin, C. R., Fang, M. J., Rogers, J. D., Fournier, J., Lechat, C., & Ju, Y. M. (2010). Phylogenetic status of Xylaria subgenus Pseudoxylaria among taxa of the subfamily Xylarioideae (Xylariaceae) and phylogeny of the taxa involved in the subfamily. Molecular Phylogenetics and Evolution, 54(3), 957-969.

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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Incidently
By: Roo Vandegrift (Werdnus)
2015-03-12 01:09:59 CDT (-0500)

That is an absolutely lovely fungus. No chance you collected any that you’d like to mail to to me to examine, is there?

Okay, I see what’s going on here!
By: Roo Vandegrift (Werdnus)
2015-03-12 00:45:42 CDT (-0500)

There’s a been a lot of confusion about these softer-bodied Xylaria from termite nests. They have been, as noted, considered Xylaria, Podosordaria, and Pseudoxylaria (which Boedijn erected in 1959 to accommodate X. nigripes).

To skip ahead through all of the history of naming and re-naming, the current consensus is that Pseudoxylaria (including this fungi) is a phylogenetically distinct subgenus of Xylaria, specifically associated with termite nests. X. nigripes is the prototypical example, but is far from the only fungus this could be… I think the best identification possible from these photos is Xylaria subgenus Pseudoxylaria, for which I will now go and make a taxon entry. This is particularly because the diversity of termite-associated Xylaria increases with fungus-cultivating termite diversity, which is highest in Africa.

The definitive work that shows this is: Hsieh, H. M., Lin, C. R., Fang, M. J., Rogers, J. D., Fournier, J., Lechat, C., & Ju, Y. M. (2010). Phylogenetic status of Xylaria subgenus Pseudoxylaria among taxa of the subfamily Xylarioideae (Xylariaceae) and phylogeny of the taxa involved in the subfamily. Molecular Phylogenetics and Evolution, 54(3), 957-969.

But see also: Rogers, J. D., Ju, Y. M., & Lehmann, J. (2005). Some Xylaria species on termite nests. Mycologia, 97(4), 914-923.

And: Ju, Y. M., & Hsieh, H. M. (2007). Xylaria species associated with nests of Odontotermes formosanus in Taiwan. Mycologia, 99(6), 936-957.

not exactly
By: Danny Newman (myxomop)
2015-03-11 23:17:36 CDT (-0500)

a research-grade reference… a link to a nutriceutical page?

Created: 2015-01-22 12:05:19 CST (-0600)
Last modified: 2015-03-12 01:16:05 CDT (-0500)
Viewed: 141 times, last viewed: 2018-09-18 20:34:41 CDT (-0500)
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