|User’s votes are weighted by their contribution to the site (log10 contribution). In addition, the user who created the observation gets an extra vote.|
|I’d Call It That||3.0||6.48||1||(zaca)|
sum(score * weight) /
(total weight + 1)
I made the microscopy for this specimen, using a mount in a solution of floxine B. I became surprised with the sizes of both spores and the corresponding septa, bigger than the indicated in CNALH for the species C. cerina. This time I could observe well the spores, the asci and the paraphyses, which according to that source are “with some branching or frequently branched”. Looking for more information, I got aware of a recent paper published in “The Lichenologist” (available here). The authors study the Caloplaca cerina group, which is defined as a monophyletic, but internally richly branched lineage. Several species are identifyed, but concerning C. cernina s. lat they consider this as a polyphyletic taxon which, according to the key given, can be separated from the other species in the group by living on trees, having a thallus without any vegetative diaspores and an ascospore septum wider, 4.0-7.0. Within C. cerina s. lat the division is made in clades A to D, the last one further divided into D1 to D3. The clade D is the one having bigger ascospores and septum:
“ascospores (11–) 14·6 ± 1·7 (–20) × (6–) 7·9 ± 0·9 (–10) µm; septum (5–) 6·7 ± 1·2 (–10) µm wide (n = 90)”.
I believe that my specimen falls into this clade. I got the following average dimensions for the spores (where only one spore has a lenght below 14 µm):
Me = 14.8 × 8 µm ; Qe = 1.9 (N=31).
Created: 2012-06-10 13:41:04 PDT (-0700)
Last modified: 2012-06-10 13:41:07 PDT (-0700)
Viewed: 54 times, last viewed: 2017-06-13 00:40:07 PDT (-0700)