Observation 203345: Enterographa elaborata (Lyell ex Leight.) Coppins & P. James
When: 2015-04-24
Collection location: Sintra, Portugal [Click for map]
Who: zaca
No herbarium specimen

Notes: This is the first time I observed this species of Enterographa. The genus itself is quite new for me and the first observation of a species of it was posted only one and a half month ago (though based on material of last year, see observation 200180).
A big amount of specimens growing on the bark of almost all the trees at this place, visited for the first time. The habitat was shared with other crustose lichens and it was often associated with another Entographa, E. hutchinsiae, usually with contiguous thalli. Also abundant were Graphis and Pyrenula. It was more common on Acer pseudoplatanus that are well represented here, but it also grew on other trees.
I’m pretty sure about the classification of these specimens as Enterogrpha elaborata, since all their features coincide with those given in the Ref. 1 (British Flora) for that species and the photos are perfect copies of that given in Ref. 2.
Here are some of their features:
- Thallus grenish-grey, refractive, reacting C+ red (due to the presence of Gyrophoric acid) quickly fading, K- or K+ yellowish, KC+ red;
- Apothecia lirellate, lirellas dark brown, conspicuous, immersed in the thallus, serpentine, branched or stellate, surronded by a whitish zone;
- Asci elongated clavate, 8-spored;
- Spores hyaline, halonate, straight or slightly curved, multisepate: 8-15(?) septa, with the following dimensions:
(40.3) 46.7 – 56.8 (59.5) x (3.9) 4.1 – 4.8 (5) µm
Q = (9.8) 10.3 – 12.6 (13.8) ; N = 28
Me = 51.8 × 4.5 µm ; Qe = 11.5
(The values in the British Flora are – septa: 8-17, dimensions: 32-65 × 2.5-4.5 µm).

Enterographa elaborata is said to be very rare in Britain (Ref. 1) and to exist in Western Europe, Mediterranean and Macaronesia. As usual I know nothing about its abundance in Portugal.

This observation includes a set of photos for the purpose of comparing the features of the specimens in this observation and those of E. hutchinsiae (for which the material of observation 202256 was used).

Images

517963
517964
Close up;
517965
517966
Together with E. hutchinsiae;
517967
Microscopy:Sections;
517968
Microscopy:Sections-Close up;
517969
Microscopy: Asci;
517970
Microscopy:Spores;
517971
Comparison of features between E. hutchinsiae (top) and E. elaborata (bottom): Apothecia, chemistry, section, asci and spores.

Proposed Names

86% (1)
Eye3 Eyes3
Used references:
Ref. 1 – British Flora: Smith et al. (eds.); The Lichens of Great Britain and Ireland, The British Lichen Society, 2nd ed., 2009;
Ref. 2 – http://www.britishlichens.co.uk/...
Based on microscopic features
Based on chemical features

Please login to propose your own names and vote on existing names.

Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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Thanks, Jason.
By: zaca
2015-04-25 13:45:21 CDT (-0400)
Great work!
By: Jason Hollinger (jason)
2015-04-25 13:38:03 CDT (-0400)

This is impressive even by your high standards. :)

Created: 2015-04-25 13:31:15 CDT (-0400)
Last modified: 2015-04-25 13:43:31 CDT (-0400)
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