Observation 165519: Sclerococcum sphaerale (Ach.) Fr.

When: 2014-05-09

Collection location: Jamor, Oeiras, Portugal [Click for map]

Who: zaca

No specimen available

Notes:
This another Lichenicolous fungi growing on a Pertusaria sp. (see observation 163571 for Sphinctrina tubiformis).

The genus Sclerococcum was introduced for S. sphaerale , a fairly common lichenicolous fungus growing on the saxicolous Pertusaria corallina (see the Ref. 1), but that can also live on other Pertusaria sp, as happens here. In the case of Pertusaria corallina the known effect of this fungus is the inihbition of isidia development; In this case it seems to be the falling of apothecia, leaving pits on the thallus surface of the lichen.
Here are some of its features:

Conidiomata with approximately 150 um, dark-brown to black, arranged in numerous groups in the thallus of a corticolous Pertusaria sp.;
Conidia 1-septate with smooth walls, pale brown, dimensions in the range 4-6.5 × 2.5-3.5 um, arranged in black sporodochia (mount in amonia) of several different forms – globose, conical, ovoide, etc. – with dimensions in the ranges 20-50 × 15-20 um.

Good photos of this fungus can be seen at Ref. 2.

References:
Ref. 1: Paul Diederich, Sclerococcum cladoniae, a new lichenicolous hyphomycete on Cladonia from Luxembourg, Bull. Soc. Nat. luxemb. 111: 57-59 (2010);
Ref. 2: Lastdragon – http://www.lichens.lastdragon.org/...

Species Lists

Images

Mycroscopy 1: Sporodochia;
Mycroscopy 2: Sporodochia;
Mycroscopy 3: Sporodochia;
Mycroscopy 4: Sporodochia and Conidia;
Mycroscopy 5: Sporodochia and Conidia.

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Comments

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Thanks, Jason!
By: zaca
2014-05-19 00:06:58 BST (+0100)
Good work!
By: Jason Hollinger (jason)
2014-05-19 00:04:32 BST (+0100)

Created: 2014-05-18 22:45:59 BST (+0100)
Last modified: 2014-05-18 23:17:19 BST (+0100)
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