Observation 69818: Opegrapha atra Pers.

When: 2011-06-18

Collection location: Lourinhã, Portugal [Click for map]

Who: zaca

No specimen available

As is known the attempt to identify a lirellae by photograph can result in a big failure. However, I would draw attention to the description and the photographs in Irish lichens, which together with the shape of the spores gives a dead match for the species Opegrapha atra. The dimensions of the spores and asci observed – in average Me = 15.8 × 4.2 µm (N=36) and Me = 40.5 × 11.6 µm (N=10), respectively, also agree with those given in CNALH for this species. In picasaweb a photo of the microscopy is presented, where the hypohymenium with black layer is visible, and agree with my observations.

Proposed Names

58% (1)
Eye3 Eyes3
Used references: Irish lichens,CNALH, picasaweb.
Based on microscopic features: See attached photos.
Based on chemical features: All chemical reactions negative.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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Created: 2011-06-21 18:27:59 CDT (-0500)
Last modified: 2011-06-21 18:29:38 CDT (-0500)
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