Observation 181436: Monoblastia Riddle
When: 2014-09-27
Who: zaca
No herbarium specimen

Notes: This observation was made on a rainy day and my first impression in the field was that it could be an Arthonia. Later, magnifying the photo, I could see some small ostioles, meaning that it is a pyrenocarpous. The microscopy confirmed the suspection and the perithecia analised show a huge mass of mature spores and no asco was visible. Strangely the spores resemble those of Pertusaria, simple and big (~ 30 × 15 um), but not so big as in that genus. Then I looked to Ref. 1 and nothing similar appeared there. After I tried Ref. 2, which refer to other regions besides the one where I live, and saw that the only genera cited there having simples spores (or aseptate) are Pertusaria (whose fruitbodies are considered apothecia) and Monoblastia, but with ornamented spores (with spines?). Moreover, the species cited there with similar dimensions of spores, M. palmicola, has a immersed thallus, which is not the case of my specimen. So, what is this?

Remark: One could doubt that this is a lichenised species, but the photos of the microscopy permit to see some green and golden cells. I could not yet repeat the microscopic analysis to see more details, and maybe next week I can proceed.


Microscopy: Perithecial section;
Microscopy: Perithecial section;
Microscopy: Spores (x400);.
Microscopy: Spores (x1000).

Proposed Names

48% (2)
Eye3 Eyes3
Used references: Ref. 1: Alan Orange: British and Other Pyrenocarpous Lichens, 2013 (available at: https://www.museumwales.ac.uk/...).
Ref. 2: A. Aptroot, R. Lücking, H.J.M. Sipman, L. Umaña, J.L. Chaves: Pyrenocarpous lichens with bitunicate asci – A first assessment of the lichen biodiversity inventory in Costa Rica; Bibliotheca Lichenologica Band 97, 2008 (available at: http://www.inbio.ac.cr/...).

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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Created: 2014-10-03 13:00:00 PDT (-0700)
Last modified: 2016-03-10 07:43:01 PST (-0800)
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