LEJEUNIA - Lichens of Belgium, Luxembourg and northern France

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with Luxembourg material of the same species (P. Diederich 8910), proved that
ascomatal setae in this species are definitely thick-walled (Fig. 1). This suggests
that the specimen examined by COLE & HAWKSWORTH (2001) is in a poor
condition, or belongs to a different species. We are aware that the generic limits
between Trichonectria and Nectriopsis are far from being clear, and also that
the ascospores and anamorph of most Trichonectria species are different from
those of the type species, T. hirta, but for the moment, we believe that it is best to
include both T. anisospora and T. rubefaciens within the genus Trichonectria.
*Unguiculariopsis thallophila (P. Karst.) W. Y. Zhuang
Luxembourg, Ard.: S of Beiler (J8.15), on Lecanora chlarotera, on Populus, 8.1986, P.
Diederich 7297 (h).
France, Pic.: Pas-de-Calais, à 5 km au SSE de Montreuil, route d’Ecuires vers Bloville,
à 500 m avant Bloville (G22.38), sur Acer, le long d’une route, sur L. chlarotera,
7.2002, P. Diederich 15453 (h).
Lichenicolous ascomycete new for the study area.
Verrucaria elaeina Borrer
Belgium, Mosan: Dinant, Fonds de Leffe (H5.38), shaded calcareous rock in forest, 2 &
4.1999, D. Ertz 26 & 54 (LG); Dinant, Devant-Bouvignes (H5.37), shaded calcareous
rock in forest, 3.1999, D. Ertz 37 (LG); Anseremme, rochers de Moniat (H5.47), shaded
calcareous outcrop in forest, 4.1999, D. Ertz 528 (LG); Plainevaux, roche aux Faucons
(F7.52), shaded calcareous rock at the top of an outcrop, 10.2001, D. Ertz 390 (LG);
Embourg, rochers du Bout du Monde (F7.53), shaded and damp calcareous outcrop in
forest, 11.2001, D. Ertz 399 (LG); Comblain-au-Pont, Les Tartines (G7.23), base of a
calcareous outcrop in forest, 11.2001, D. Ertz 356 (LG); Yvoir, rocher de Champalle
(H5.27), calcareous rock in forest, 12.2001, D. Ertz 417 (LG); Huy, entrée du vallon de
Solières (G6.14), shaded calcareous rock in forest, 3.2002, D. Ertz s.n. (LG).
Luxembourg, Lorr.: au S de Schengen, dans la forêt ‘Fiels’ (N9.12), 280 m, sur une paroi
verticale ombragée en calcaire coquillier, dans une forêt, 8.1998, P. Diederich 13721 (h).
FIG. 1. — Ascomatal setae of Trichonectria rubefaciens. A, holotype (NY); B, P.
Diederich 8910 (h) (del. G. Samuels). Scale bar = 10 μm.