Observation 103157: Tephromela atra (Hudson) Hafellner
When: 2011-10-19
(34.1917° -118.9998° 157m)
Herbarium specimen reported

Notes: HABITAT non-calcareous rock outcrop; SUBSTRATE rock; ASPECT shaded; NOTES thallus rimose white thin near margin, prothallus thin and black but distinct, cortex K+y C-? KC-? UV-, medulla K+y C+r turning orange KC+r to rose UV~white 350nm UV- 375nm, apothecia immersed at first becoming large and apparently lecanorine and superficial in age, rim thalline concolorous, disk black shiny flat to slightly convex epruinose, epihymenium red-violet POL- turning violet in K, hymenium red-violet turning violet in K POL-, hypothecium red-brown turning orange in K POL+, medulla POL+, paraphyses simple thick conglutinated but easily separating in K, asci walls K/I-, asci tips thick K/I+ apparently without canal?; SPORES 8 per ascus, simple, hyaline, smooth, ellipsoid, 8-10 × 5-6 µm.

Determined by K. Knudsen, despite the highly unusual C+ red reaction. I can’t find any mention of this chemistry for Tephromela atra anywhere in my literature. Yet they split other species off based on similar differences in chemistry. What gives?

Images

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243212
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243213
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243214
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Thallus, at 10×.
243215
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Thallus margin, at 30×.
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Thallus, at 30×.
243217
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Apothecial section, in water, at 100×.
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Apothecial section, in water, at 100x, cross-polarized.
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Apothecial section, in K, at 100×.

Proposed Names

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Eye3 Eyes3
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus

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Created: 2012-07-28 11:00:48 AEST (+1000)
Last modified: 2012-07-28 11:00:52 AEST (+1000)
Viewed: 10 times, last viewed: 2015-01-31 22:27:37 AEDT (+1100)
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