Observation 217407: Catillaria praedicta Tretiach & Hafellner

When: 2015-09-26

Collection location: Lourinhã, Portugal [Click for map]

Who: zaca

No specimen available

Growing on the bark and wood of a Juniperus shrub very close the sea. This lichen was found on the same branch than the Buellia considered at observation 217405.

This is my first observation of a lichen belonging to one of the genera Catillaria or Catinaria (at least I think so).

I feel like entering the fase of infinitesimal lichens. In this one everything is small: apothecia with about .2 mm and spores very small and narrow.
At my first atempt to analyse it under the scope I didn’t understand much of what I saw:
- An alga with big cells (~10 um in diameter) – later on identified as Dictyochloropsis (see e.g.
- Apothecia seeming partly immersed in the thallus and not closed below;
- Paraphyses with very distinctive brown caps;
- Asci of Catillaria type, with a uniform amyloid apical dome;
- Minuscule (6-8 × 2.5-3 um), 1-sepate spores, hialine when young becoming very pale brown with age, seemed to be aligned in a chain inside the asci, but in number greater than the usual 8 (seeming like the double; later I saw 16 spores standing together after the ascus collapse).

Entering these data in the generic key (6) for “crustose lichens with rounded apothecia” and next to the key (6.c) with “photobiont chlorococcoid; ascospores colourless, septate” we end up with the genera Catillaria or Catinaria.
Gowing to the details of these genera one can see that the specie Catinaria neuschildii is almost a perfect match, even concerning the habitat (on Juniperus bark and old Salix wood, according to the British Fllora, only the dimensions of the spores do not agree completely. This species only differing from the similar C. atropurpurea in having 12 to 16 spores/ascus and smaller spores ( 9-13 × 5-6 um for C. neuschildii and 10-15 × 5-7 um for C. atropurpurea). There are also similar species in the related genus Cattillaria, like Cattillaria gilbertii, with the same features and similar spores (10-12 × 2.5-3 um), which are closer (in width) to my specimen.
Since any of these genera are new to me, I’m in doubt about the genera and species.


Microscopy: Apothecia section (top), exciple and hymeium (bottom);
Microscopy: Algal cells;
Microscopy: Asci (in melzer on bottom left);
Microscopy: Paraphyses (very disctintive) and spores.

Proposed Names

29% (1)
Used references: British Flora
Based on microscopic features
29% (1)
Used references: British Flora
Based on microscopic features
58% (1)
Eye3 Eyes3
Recognized by sight: See the notes and comments to observation 239866.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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Created: 2015-10-01 18:04:42 CDT (-0400)
Last modified: 2016-06-10 20:40:24 CDT (-0400)
Viewed: 58 times, last viewed: 2018-04-15 15:40:30 CDT (-0400)
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