Observation 209974: Polycoccum sporastatiae (Anzi) Arnold

When: 2014-10-10

Collection location: Black Canyon, Humboldt Range, Pershing Co., Nevada, USA [Click for map]

40.5456° -118.18° 2803m

Who: Jason Hollinger (jason)

Specimen available

immersed in thallus of host, Sporastatia testudinea; on shaded north vertical face of igneous outcrop on ridge; rugged granitic outcrops along narrow summit ridge

hamathecium best seen when squashed, of gnarled anastomosed ~2.5µm-thick paraphyses/oids; spores 8 per ascus, 1-septate, ~constricted, gray-brown, textured, macrocephalic, cells oblong, ~19-22×8-10µm


stacked, at 40x – parasite is the immersed black perithecia scattered all over, somewhat difficult to distinguish from the aspicilioid apothecia of the host, but easy to distinguish even under dissecting scope when sectioning

Proposed Names

87% (1)
Eye3 Eyes3
Recognized by sight: perithecia immersed in thallus of host, Sporastatia testudinea
Based on microscopic features: spores 8 per ascus, brown, textured, ~macrocephalic, ~20×9µm; hamathecium persistent

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
OK! Thanks anyway.
By: zaca
2015-07-14 17:55:15 CDT (-0400)
Sorry, not in this case
By: Jason Hollinger (jason)
2015-07-14 16:14:35 CDT (-0400)

I never collect these things deliberately. I actually collected it because of a different parasite: Rhizocarpon pusillum. I don’t have a photo of that either. I don’t even have photos of the perithecium section or spores. :(

Jason, do you have a photo of …
By: zaca
2015-07-14 15:55:02 CDT (-0400)

the entire thallus of the host? It seems a very distinctive species. Nice specimen!

Created: 2015-07-14 11:57:26 CDT (-0400)
Last modified: 2015-07-14 11:57:29 CDT (-0400)
Viewed: 29 times, last viewed: 2017-06-20 10:42:28 CDT (-0400)
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