LEJEUNIA - Lichens of Belgium, Luxembourg and northern France

-28-
*Roselliniella atlantica Matzer & Hafellner
Luxembourg, Ard.: Bourscheid, along road to Ettelbruck, near Michelau (K8.45), W
exposed schistose outcrops along road, on Neofuscelia pulla, 10.2002, P. & B. van den
Boom 29887 (h).
This species was described from the British Isles, France and Sweden on
Neofuscelia and Xanthoparmelia species (Matzer & Hafellner, 1990). It has
also been reported from Papua New Guinea on Hypotrachyna and Parmotrema
(Aptroot et al., 1997), from the Canary Islands on Platismatia (Etayo, 1996),
from Spain on Neofuscelia (Calatayud et al., 1995), and from N America
(Florida) on Parmotrema (Etayo & Breuss, 1998). It is new for the study area.
Sarcosagium campestre (Fr.) Poetsch & Schied. var. macrosporum Coppins
& P. James
Belgique, Mosan: Vedrin (au N de Namur), cimetière de Vedrin (G5.26), sur des
mousses dans un pot de fleur ensoleillé dans un cimetière, 11.2002, D. Ertz 2731 (BR);
Plombières, parc de l’ancien site minier, on soil in Armeria-heathland (E8.52), 4.2001,
L. B. Sparrius 4680 (h).
This taxon was formerly known from a single locality in L Lorr. (DIEDERICH &
SÉRUSIAUX, 2000: 158) and from the British Isles, and is thus new for Belgium.
*Sphaerellothecium cladoniicola E. S. Hansen & Alstrup
Luxembourg, Lorr.: NE of Differdange, near Rodange, reserve Prënzebierg (M8.31),
abandoned old quarry with Betula and Salix trees, on Cladonia fimbriata, 10.2002, P. &
B. van den Boom 29846 (hb Diederich).
In the study area, this species was known only from a single 1888 specimen
from B Brab. (SÉRUSIAUX et al., 1999). The additional specimen reported here
is quite reduced, but shows that the species still exists in this area, and that it is
most likely to be overlooked.
Sticta fuliginosa (Dicks.) Ach.
Belgium, Ard.: near Herbeumont (L6.26), on Acer, 3.2003, D. Ertz 3052 (BR).
This macrolichen was known from a single recent locality in the Lorr. district
and was considered to have disappeared from the Ard. district since 1928.
We recently revisited the Lorr. locality and found a relatively healthy
population of over 40 thalli on four trees. In the Ard. locality, more than
100 thalli grow on a single Acer tree of 45 cm in diam. In both localities,
the species grows in well-preserved old forests with important populations
of Lobaria pulmonaria. These trees are mainly Acer pseudoplatanus and A.
platanoides, and more rarely Quercus sp.; only one thallus of L. pulmonaria
was observed on Fagus sylvatica.