It was collected twice in bog, from roots and stolons of Rubus chamaemorus (from roots of unknown plant in origial description),  19.08.2009 (only pictures), 24.06.2012 (studied specimen), N61,054422° E69,456725°.

Frb capitate, from hyaline filiform stem and pure white spherical capitula (mazaedium), growing in clusters or scattered, up to 1,5 mm high, head about 200 mk in diam, stem to 80 mk thick.

Stem from textura porrecta, hyaline or yellowish at the base in some specimens; hyphae at base about 5  broad, cells on average 50 mk long, becoming some shorter and thinner in upper part; upper part of stem crowned with hymenium without other structures, some short paraphysoid elements may be present (seen when hymenium washed away); asci cylindrical, clampless, inamyloid, with thin wall (some moniliform from protruding spores), 33-44 x 4-5,2; paraphyses cylindrical or with clavate end segment, segmented, slightly to highly exceeding the hymenium, with several round oil guttules (not torquose), 47-74 x 3-4,4; spores globose (lenticular?) 4,7 (4,1-5,1) (N=25, in tapped mount).

Hans-Otto Baral, 23-02-2013 15:40

Re : Roeslerina media

Don't know this nice fungus which seems very close to Roesleria. Strange that this family falls genetically in the Helotiales.

Zotto

Peter Welt, 23-02-2013 21:07

Re : Roeslerina media

A strange and beautiful mushrooms. Because one believes in a Hypomycetes and then these asci. But what pray tell, these have to do with the asci Helotiales? I do not trust the peace, they say in German.


Peter

Hans-Otto Baral, 23-02-2013 21:31

Re : Roeslerina media

I can imagine that: Roesleriaceae abandoned spore ejecteion, thereby the asci are reduced, loose their apical apparatus, and the spores do not further need to be aerodynamic.

--of course a theory. I somewhere read that Roesleria even belongs in the Helotiaceae, but cannot find that. However, a BLAST in GenBank actually suggests a helotialean relationship.

Zotto

Peter Welt, 23-02-2013 21:45

Re : Roeslerina media

Du hast dich verlesen, lieber Zotto. Roesleria Thu¨ m. & Pass. ist in den Helotiales. Für Roeslerina ist Stellung im System völlig unklar. (Myconet Volume 14)

Nobody is perfect. Auch unser hochgeschätzter Zotto nicht ;-)

Gruß Peter

Hans-Otto Baral, 23-02-2013 21:54

Re : Roeslerina media

ich weiß tatsächlich den Unterschied zwischen Roesleria und Roeslerina nicht, aber groß kann er nicht sein, die Asci und Sporen dieser R. media sind tupfengleich mit denen der Roesleria pallida. In Genbank ist nur Roesleria subterranea, was aber laut IF schon mit pallida verwechselt wurde. 

ich denke die Familie Roesleriaceae macht Sinn, und sie scheint in den Helotiales zu stehen. Was in der Outline alles an unklaren Zugehörigkeiten steht, ist durchaus nicht alles so unklar. Die Autoren der Liste wissen es halt oft nicht genauer. 

Zotto