Observation 59281: Illosporium carneum Fr.

When: 2010-11-04

Collection location: Main Boulder River Forest Service Campground, Park Co., Montana, USA [Click for map]

Who: Jason Hollinger (jason)

Specimen available

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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Your instinct was right, Damon
By: Jason Hollinger (jason)
2011-01-21 14:23:12 EST (-0500)

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


Thanks for the pointer, damon!
By: Jason Hollinger (jason)
2010-11-21 12:06:08 EST (-0500)

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.

By: damon brunette (damonbrunette)
2010-11-20 15:09:50 EST (-0500)

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

This looks
By: damon brunette (damonbrunette)
2010-11-20 15:09:02 EST (-0500)

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

Created: 2010-11-20 10:04:56 EST (-0500)
Last modified: 2011-01-21 14:21:53 EST (-0500)
Viewed: 133 times, last viewed: 2017-11-09 11:46:06 EST (-0500)
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