Observation 109309: Julella vitrispora (Cooke & Harkness) M.E. Barr

When: 2012-09-08

Collection location: Parque de Monsanto, Lisboa, Portugal [Click for map]

Who: zaca

No specimen available

This is the second time I found a species of the genus Julella (for the other see observation 96835). Some of its features that permit to establish the genus are:
- Thallus crustose;
- Photobiont: absent;
- Perithecia small (up to ~.8 mm);
- Spores ellipsoid, muriform (up to ~20 cells) and hialine.
J. sericea, the unique species appearing in the British Flora and mentioned as a possible synonym of J. fallaciosa, differs from J. lactea by having a darker thallus (pale grey or yellowish grey) whereas in J. lactea it is whitish, smaller perithecia and smaller spores.
The average dimensions of the spores obtained for this specimen were:
Me = 32.8 × 14.2 µm ; Qe = 2.3.
It should be mentioned that these values are bigger than those indicated in CNALH for J. lactea (22-28 × 9-13 µm) and that the spores were arranjed (mainly) in 8 per ascus. Another point to mention is the discrepancy between the chemistry of my specimen and that given in CNALH for both species mentioned above (all negative).
I was not able to find any other alternative for classification beyond those species mentioned above.


Chemical reactions;
Microscopy – Asci;
Microscopy – Spores.

Proposed Names

58% (1)
Based on microscopic features
Based on chemical features
87% (1)
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Recognized by sight: See the Notes of observation 165386.

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Created: 2012-09-10 22:44:40 CEST (+0200)
Last modified: 2014-05-20 02:17:55 CEST (+0200)
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