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Nemania sp. FC-435
Stromata superficial, orbicular to linear, enclosing 1-7 perithecia,
0.5-1.3 mm diam, weakly carbonaceous; surface brownish black, with a yellowish
to pale brown persistant hyphal coating except around the ostioles; margin abrupt.
Perithecia
globose, 0.35-0.40 mm diam.
Ostioles papillate, more or less conical,
black.
Asci cylindrical, short-stipitate, the spore-bearing parts 88-96 µm
long x 7.5-9 µm broad, the stipes30-40 µm long, with apical apparatus inamyloid
(not blueing in Melzer's reagent but blueing in Lugol's solution), inverted
hat-shaped, 3-3.5 µm high x 2.5 µm broad.
Ascospores 13.5-18 x 5.5-7
µm, medium brown, ellipsoid-inequilateral with broadly to narrowly rounded ends,
with a short, very inconspicuous germ slit 4 µm long on the less convex side.
Specimen examined: FRANCE: Pyrénées Atlantiques (64):
Orthez, Bonnut, 24 Mar. 1996, FC-435, on wood of Alnus glutinosa.
Notes: This Nemania species is microscopically identical to N.
aenea var. aureolutea and differs in that stromata contain very few
perithecia and keep a conspicuous yellowish hyphal coating even when mature.
In addition, ostioles are more prominent than in N. aenea var. aureolutea.
This collection is represented by few stromata and we feel unable to
assess whether it is only a variant of N. aenea var. aureolutea or
a distinct species. If it is collected again, cultures should be carried
out in order to elucidate its situation in comparison with N. aenea var.
aureolutea.
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