Observation 188266: Pertusaria
When: 2014-11-02
Who: zaca
No herbarium specimen

Notes: I’m in trouble again with a Pertusaria sp., living on a branch of Quercus coccifera. In this case all the macro features and chemistry (C-, K+ pale yellow and KC+ (light) orange) of the specimen are in accordance with those of P. heterochroa, but the spores are somewhat bigger than those described in
the reference, being as in that species two per ascus, double walled, rough and markedly transversally striated. I obtained the following dimensions for the spores:
(99.2) 116.6 – 141.1 (141.3) x (37.8) 38.9 – 56.3 (59) µm
Q = (2.3) 2.33 – 2.9 (3) ; N = 12
Me = 127.7 × 49.3 µm ; Qe = 2.6,
and according to the reference P. heterochroa has spores with:
(60) 90-120 x (22) 38-45 um.
This specimen was parasitised by Sphinctrina tubiformis, to be considered in another observation.

Images

481457
Microscopy: Asci and spores;
481453
481454
481455
Microscopy: Apothecial section;
481456
Microscopy: Asci and spores;
481458
Microscopy: Asci and spores;
481459
Microscopy: Young ascus.

Proposed Names

86% (1)
Eye3 Eyes3
Used references: Monserrat Boqueras and Xavier Llimona, The Genus Pertusaria (Lichenised Ascomycotina) on the Iberian
Based on microscopic features

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Eye3 = Observer’s choice
Eyes3 = Current consensus

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Created: 2014-11-13 21:51:53 GMT (+0000)
Last modified: 2014-11-14 00:41:48 GMT (+0000)
Viewed: 33 times, last viewed: 2016-10-26 22:17:35 BST (+0100)
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