Observation 275005: Bacidia De Not.

When: 2017-04-22

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

66.5685°S 174.2122°W -3494m [Click for map]

Who: zaca

No specimen available

Notes:
Strange one on a strange host tree.

Images

A photo of the bark, free of any lichen.
2017-05-09: Revisited.
Microscopy: Apothecial section and its close ups (x100 & x400, in water);
Microscopy: Apothecial section in water and its reaction to KOH (x100);
Microscopy: Hymenium views (x400, in KOH);
Microscopy: Asci (x1000, in KOH);
Microscopy: Asci (x1000, in IKI);
Microscopy: Some spores (x1000, in KOH).
The host: Viburnum tinus.

Proposed Names

29% (1)
Recognized by sight
87% (1)
Recognized by sight

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= Observer’s choice
= Current consensus

Comments

Add Comment
Microscopy added.
By: zaca
2017-05-09 17:51:58 CDT (-0400)

The spores are multiseptate (impossible to say how many septa), acicular and somewhat long; the following dimensions are to be taken as indicative:
(41.6) 49.5 – 56.8 (60.8) × (1.8) 2.1 – 2.6 (2.9) µm
Q = (16.7) 21 – 24.9 (27.7) ; N = 17
Me = 52.8 × 2.4 µm ; Qe = 22.3

End of the enigma! Bacidia is the genus.
By: zaca
2017-05-09 16:37:59 CDT (-0400)

Specimen rediscovered (see the new attachments).
To be updated soon with the microscopy.

I hope you do!
By: Jason Hollinger (jason)
2017-04-27 20:31:03 CDT (-0400)

A black Letrouitia would be a good match if such a species exists. Also I’ve seen species of Malmidea in southern Florida with apothecia a lot like that. And yes, some of the foliicoles (teleomorphs at least) have apothecia very similar, like Calopadia. Or it could always be a Bacidia or Bacidina; there are some species with thin continuous crust. Or Megalaria. Or… haha!

No specimen,
By: zaca
2017-04-27 20:15:21 CDT (-0400)

because in the field I didn’t notice the apothecia, which are all concentrated on the left part. I will try to find it again, one of these days. I could only thought about Strigula, which is mainly tropical.

Oh I see… very subtle
By: Jason Hollinger (jason)
2017-04-27 19:58:16 CDT (-0400)

There is a very thin greenish thallus with small black apothecia whose rims have a slight whitish bloom. No specimen? I have lots of guesses, but no point without seeing spores or algae! Looks like a (sub)tropical species.

I don’t think that …
By: zaca
2017-04-27 18:42:45 CDT (-0400)

there is any Nectria like fungus here. I think that you was decived, as I do whe I first look at the photos, and the pustules one can see belong to the tree and its coloration was exagerated by the camera.

Have you considered Nectria
By: Jason Hollinger (jason)
2017-04-27 18:25:13 CDT (-0400)

or similar nonlichenized fungus?

Created: 2017-04-27 17:40:15 CDT (-0400)
Last modified: 2017-05-11 19:36:35 CDT (-0400)
Viewed: 73 times, last viewed: 2019-08-27 12:08:58 CDT (-0400)
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