Observation 59281: Illosporium carneum Fr.
When: 2010-11-04
Herbarium specimen reported

Notes: Odd fungal parasite (pink dots) bursting through the cortex of an old Peltigera rufescens thallus. I’m not sure if this is started as a parasite on a living thallus, or if it is “merely” decomposing a dead thallus. I noted several infected thalli in the area.

Proposed Names

29% (1)
Recognized by sight
87% (1)
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Used references: Determined by Paul Diederich (by photo).

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Eye3 = Observer’s choice
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Comments

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Your instinct was right, Damon
By: Jason Hollinger (jason)
2011-01-21 20:23:12 CET (+0100)

Paul Diederich immediately recognized this by photo as the anamorph of one apparently several species of Pronectria. Here’s more info:

http://www.lichenology.info/...

Thanks for the pointer, damon!
By: Jason Hollinger (jason)
2010-11-21 18:06:08 CET (+0100)

I thought Nectria immediately, too. I didn’t realize any were known to parasitize lichens. Cool.

My impression was that the minute black dots were insect droppings; they weren’t obviously attached to anything.

Also,
By: damon brunette (damonbrunette)
2010-11-20 21:09:50 CET (+0100)

are the black dots part of the lichen, or a pyrenomycete.

This looks
By: damon brunette (damonbrunette)
2010-11-20 21:09:02 CET (+0100)

like the conidial stage of a nectria cinnabarina, or maybe another nectria, though im only familiar with a few. In the RWG Dennis book it only has only species (Nectria lecanodes) that says occur “on thalli of frondose lichens, in autumn”.

Other info
http://www.jstor.org/pss/3758914

Created: 2010-11-20 16:04:56 CET (+0100)
Last modified: 2011-01-21 20:21:53 CET (+0100)
Viewed: 114 times, last viewed: 2016-09-23 12:05:29 CEST (+0200)
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