LEJEUNIA - Lichens of Belgium, Luxembourg and northern France

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epipolia auct. is Buellia hedinii H. Magn. The populations present in our study area
all belong to B. hedinii. The name has not yet been combined in Diplotomma.
ROUX et al. (2002) show that Polyblastia deminuta Arnold, known from the
Mosan district in Belgium, is a non-lichenized, lichenicolous fungus growing
on endolithic, often poorly developed lichens, and that it belongs to the genus
Merismatium. They introduce the new combination M. deminutum (Arnold)
Cl. Roux & Nav.-Ros.
SPARRIUS et al. (2002) have studied in detail the lichen flora of the Boul. district
in northern France (LAMBINON et al., 1998; TOUSSAINT et al., 2002), as well as
the southern part of the Mar. district and the most north-western parts of the
Pic. district. The area covered by the checklist (DIEDERICH & SÉRUSIAUX, 2000)
is expanded to include those areas. The following species are thus reported as
new for the area of study: Bacidia laurocerasi, Caloplaca cerinelloides, C.
marina, C. microthallina, C. thallincola, Chrysothrix flavovirens, Cladoniicola
staurospora (see above), Cliostomum flavidulum, Cryptolechia carneolutea,
Didymellopsis collematum, Gyalidea minuta, Lecania atrynoides, Lecanora
jamesii, Lichina confinis, Mycomicrothelia confusa, Opegrapha sorediifera,
Verrucaria erichsenii, V. halizoa, V. maura and V. sandstedei. They further
demonstrate that Cliostomum corrugatum does not occur in the study area.
STAIGER (2002) presents a remarkable revision of the Graphidaceae and a
more natural genus delimitation. A few species known from our study area are
concerned. Graphis britannica Staiger is a new name for Graphina anguina
auct. europ. The genus Phaeographis is only partly treated by this author, as
a complete treatment is planned to be published separately. Amongst the four
species known from the study area, she accepts P. dendritica (type species
of the genus) and transfers P. lyellii to Leiorreuma Eschw. as L. lyellii (Sm.)
Staiger. Phaeographis smithii and P. inusta are not treated.
THÜS (2002) revises the aquatic Verrucaria species from Central Europe. He
mentions Verrucaria praetermissa from the Ard. district in Belgium.
VANBRUGGHE et al. (2002) report the discovery of Usnea articulata in France,
Pas-de-Calais, near Montreuil-sur-Mer (Mar. district, G22.27) in 1996. They
furthermore mention an older record of the same species in France, Pas-de-
Calais, between Fruges and Créquy (Pic. district, G21.15) in 1972.
DIEDERICH & SÉRUSIAUX (2003) describe the new Stromatopogon cladoniae
Diederich & Sérus., an extraordinary lichenicolous fungus growing on
Cladonia polydactyla in Belgium (Ard. district).
DIEDERICH et al. (2003) report the discovery of the teleomorph of
Marchandiomyces aurantiacus, for which they introduce the new genus and
species name Marchandiobasidium aurantiacum Diederich & Schultheis. The
genus is close to Waitea Warcup & P. H. B. Talbot and is tentatively included
in the Ceratobasidiales.