Observation 131592: Chaetosphaerella phaeostroma (Durieu & Mont.) E. Müll. & C. Booth

When: 2013-04-06

Collection location: Matinha de Queluz, Sintra, Portugal [Click for map]

Who: zaca

No specimen available

Growing on bark. Thallus completely black, crowded with tiny round apothecia also blackish. The similarity with Placynthium nigrum is obvious, except that no bluish prothallus is visible and all my former observations of this species were on (calcareous) rock. Moreover all Placynthium species usually grow on rock and are rare in other substracta. At the same habitat I found a similar specimen with no apothecia, having the all thallus consisting of projecting hyphae (last photo).


Proposed Names

1% (2)
Recognized by sight
60% (2)
Recognized by sight: Non-lichenised fungus

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

= Observer’s choice
= Current consensus


Add Comment
By: zaca
2014-03-24 21:39:47 GMT (+0000)

Thanks, synan, for your proposal.Chaetosphaerella phaeostroma is a non-lichenised fungus with very distinctive spores. I didn’t know even the genus of it.

Yes, more probable
By: Jason Hollinger (jason)
2013-04-13 15:38:06 BST (+0100)

The one which was pointed out to me was just a few minute scattered clumps of black “warts”. Nothing near as well-developed and conspicuous as yours! I totally didn’t even notice it, even though I was studying something else growing with it. But still, it matches the basic generic description, doesn’t it?

I didn’t know …
By: zaca
2013-04-13 09:40:04 BST (+0100)

that they can live on bark, though there was the note “rare in other substrata”. That makes Placynthium more probable as the genus of it.

Some do grow on bark
By: Jason Hollinger (jason)
2013-04-13 02:49:05 BST (+0100)

I just learned that a few days ago. Thought they were all on rock, just like you, but no.

Created: 2013-04-09 21:27:20 BST (+0100)
Last modified: 2014-03-24 21:40:17 GMT (+0000)
Viewed: 59 times, last viewed: 2017-06-16 02:45:16 BST (+0100)
Show Log