New or interesting lichens and lichenicolous fungi from Belgium, Luxembourg and northern

Abstract

Studies of mainly recent collections of lichens and lichenicolous fungi led to the addition of nine taxa to the flora of Belgium, Luxembourg and northern France: Aphanopsis coenosa, Biatora efflorescens, Burgoa splendens, Caloplaca soralifera, Flavoplaca limonia, Phoma physciicola, Tremella wirthii, Usnea glabrescens var. glabrescens and Xanthomendoza oregana. Seven additional species were reported in recent publications: Caloplaca conversa var. fallax, Ceratobasidium bulbillifaciens, Hainesia brevicladoniae, H. longicladoniae, Punctelia reddenda, Oxneria huculica and Zwackhiomyces peltigerae. New to Belgium: Cornutispora ciliata, Polycoccum pulvinatum, Thelopsis rubella and Zwackhiomyces physciicola; new to Luxembourg: Bacidia carneoglauca, Enchylium limosum, Lempholemma chalazanum, Lichenothelia convexa, Polycoccum slaptoniense, Rinodina pityrea and Thelenella muscorum. Additional notes are given on some rare and threatened species. The following new combination is proposed: Xanthomendoza huculica (S. Y. Kondr.) Diederich (basionym Oxneria huculica).

Full text

Bull. Soc. Nat. luxemb. 115 (2014) 157
New or interesting lichens and lichenicolous fungi from
Belgium, Luxembourg and northern France. XV.
Paul Diederich1, Damien Ertz2, Marion Eichler3, Rainer Cezanne3,
Pieter van den Boom4, Dries Van den Broeck2 & Emmanuël
Sérusiaux5
1 Musée national d’ histoire naturelle, 25 rue Munster, L–2160 Luxembourg, Luxembourg (paul.diederich@education.lu)
2 Botanic Garden Meise, Department Bryophytes-allophytes, Domein van Bouchout, Nieuwelaan 38, B–1860
Meise, Belgium (damien.ertz@br.fgov.be; dries.vandenbroeck@br.fgov.be)
3 Kaupstraβe 43, D–64289 Darmstadt, Germany (eichler-cezanne@t-online.de)
4 Arafura 16, NL–5691 JA Son, e Netherlands (pvdboom@kpnmail.nl)
5 Evolution and Conservation Biology Unit, University of Liège, Sart Tilman B22, B–4000 Liège, Belgium
(e.serusiaux@ulg.ac.be)
Diederich, P., D. Ertz, M. Eichler, R. Cezanne, P. van den Boom, D. Van den Broeck &
E. Sérusiaux, 2014. New or interesting lichens and lichenicolous fungi from Belgium,
Luxembourg and northern France. XV. Bulletin de la Société des naturalistes luxembourgeois
115 : 157–165.
Abstract. Studies of mainly recent collections of lichens and lichenicolous fungi led
to the addition of nine taxa to the ora of Belgium, Luxembourg and northern France:
Aphanopsis coenosa, Biatora eorescens, Burgoa splendens, Caloplaca soralifera, Flavoplaca
limonia, Phoma physciicola, Tremella wirthii, Usnea glabrescens var. glabrescens and
Xanthomendoza oregana. Seven additional species were reported in recent publications:
Caloplaca conversa var. fallax, Ceratobasidium bulbillifaciens, Hainesia brevicladoniae, H.
longicladoniae, Punctelia reddenda, Oxneria huculica and Zwackhiomyces peltigerae. New to
Belgium: Cornutispora ciliata, Polycoccum pulvinatum, elopsis rubella and Zwackhiomyces
physciicola; new to Luxembourg: Bacidia carneoglauca, Enchylium limosum, Lempholemma
chalazanum, Lichenothelia convex a, Polycoccum slaptoniense, Rinodina pityrea and elenella
muscorum. Additional notes are given on some rare and threatened spe cies. e following
new combination is proposed: Xanthomendoza huculica (S. Y. Kondr.) Diederich (basionym
Oxneria huculica).
1. Introduction
is paper continues the series of notes on
the ora of lichens and lichenicolous fungi in
Belgium, Luxembourg and northern France
(Diederich & Sérusiaux 2000, Diederich et
al. 2012). It further includes the most recent
updates regarding nomenclature and taxon-
omy of the species present in our study area.
In the enumeration of specimens, the abbre-
viation ‘h’ refers to the private herbarium of
the collector. e term ‘checklist’ is used for
the checklist of lichens and lichenicolous
fungi in Belgium, Luxembourg and north-
ern France (Diederich et al. 2014), and the
term ‘checklist area’ is used for the area cov-
ered by that checklist.
2. Survey of other publications on
the lichen ora and vegetation of the
checklist area
Hellemans & Stappaerts (2012) reported
the discovery of Punctelia reddenda (Stirt.)
Krog in Flanders, where it grew on Salix in
a wet forest; the species is new to our check-
list area. Van den Broeck (2012c) collected
Arthonia didyma and A. ruana as new to
Flanders. Van den Broeck (2013a) disco-
vered Oxneria huculica in Belgium (new to
the checklist area), whilst De Wit & Van den
Broeck (2014) reported Melanelixia subar-
gentifera as new to Flanders.
Van den Broeck et al. (2012) presented a
report of a lichenological excursion to the

158 Bull. Soc. Nat. luxemb. 115 (2014)
Ourthe valley in the Belgian Ardennes in
2010, during which the lichenicolous Nec-
triopsis lecanodes and Sclerococcum sphae-
rale were found as new to Belgium. Helle-
mans (2012) listed 16 species of lichens and
lichenicolous fungi from a Mespilus tree in
Flanders, Van den Broeck (2012a) 59 spe-
cies in the nature reserve ‘Molsbergen’ near
Lokeren, Van den Broeck (2012b) 86 species
in the nature reserve ‘De Maten’ near Genk,
Van den Broeck (2013b) 90 species in the
nature reserve ‘De Most’ near Balen, Van
den Broeck & Hellemans (2013) 62 species
in the ‘Kalmthoutse Heide’, and De Beer
& Van den Broeck (2013) 75 species from
Haasop near Beveren.
Van den Broeck et al. (2013) published a
report on two lichenological eld meetings
in Luxembourg, during which two species
were found as new to the checklist area,
Caloplaca conversa var. fallax and Zwackhi-
omyces peltigerae.
Van den Broeck (2012d) published a detailed
study of the epiphytic lichens and lichenicol-
ous fungi from the Brussels area.
3. Taxonomical and nomenclatural
changes
Verrucaria hydrophila Orange is a new spe-
cies described for the rather common and
widespread aquatic lichen previously called
V. hydrela auct. or V. denudata Zsch. (Orange
2013). e species is not rare in Belgium
(Mosan and Ard.) and Luxembourg (Ard.).
Diederich & van den Boom (2013) descri-
bed two new species of Hainesia growing on
Cladonia, H. brevicladoniae Diederich & van
den Boom, known from Belgium and nort-
hern France, and H. longicladoniae Diede-
rich & van den Boom, known from Luxem-
bourg.
Diederich et al. (2014) describe a new lichen-
associated bulbilliferous basidiomycete as
Ceratobasidium bulbillifaciens Diederich &
Lawrey. e species is known from several
European countries, including Belgium and
Luxembourg.
Tehler et al. (2013) revised the genus Dirina
at world-level. e only species present
in our checklist area is Dirina massiliensis
Durieu & Mont. is species occurs either
as a fertile morph, or a sterile and sorediate
morph, rarely as a pycnidiate morph. Almost
all specimens from our checklist area belong
to the sterile, sorediate morph, previously
called Dirina stenhammari (Stenh.) Poelt &
Follmann. One old, fertile specimen from
the Ardennes (locality, collecting date and
collector unknown) represents the only
known ascoma-forming specimen from an
inland locality.
Otálora et al. (2014) revised the generic
classication of the jelly lichens (Collemata-
ceae), resulting in a completely new generic
taxonomy of the species previously inclu-
ded in Collema and Leptogium. e follow-
ing taxa are known from our checklist area:
Blennothallia crispa (Huds.) Otálora, P. M.
Jørg. & Wedin, Callome multipartita (Sm.)
Otálora, P. M. Jørg. & Wedin, Collema ac-
cidum (Ach.) Ach., C. furfuraceum (Arnold)
Du Rietz, Enchylium coccophorum (Tuck.)
Otálora, P. M. Jørg. & Wedin, E. limosum
(Ach.) Otálora, P. M. Jørg. & Wedin, E.
polycarpon (Hom.) Otálora, P. M. Jørg.
& Wedin, E. tenax (Sw.) Gray, Lathagrium
auriforme (With.) Otálora, P. M. Jørg. &
Wedin, L. cristatum (L.) Otálora, P. M. Jørg.
& Wedin, L. dichotomum (With.) Otálora,
P. M. Jørg. & Wedin, L. fuscovirens (With.)
Otálora, P. M. Jørg. & Wedin, Leptogium
cyanescens (Rabenh.) Körb., L. saturninum
(Dicks.) Nyl., Pseudoleptogium dirac-
tum (Körb.) Müll. Arg., Rostania quadrata
(Körb.) Trevis., Scytinium aragonii (Otálora)
Otálora, P. M. Jørg. & Wedin, S. biatorinum
(Nyl.) Otálora, P. M. Jørg. & Wedin, S. fra-
gile (Taylor) Otálora, P. M. Jørg. & Wedin, S.
fragrans (Sm.) Otálora, P. M. Jørg. & Wedin,
S. gelatinosum (With.) Otálora, P. M. Jørg. &
Wedin, S. lichenoides (L.) Otálora, P. M. Jørg.
& Wedin, S. magnussonii (Degel & P. M.
Jørg.) Otálora, P. M. Jørg. & Wedin, S. mas-
siliense (Nyl.) Otálora, P. M. Jørg. & Wedin.
S. palmatum (Huds.) Gray, S. plicatile (Ach.)
Otálora, P. M. Jørg. & Wedin, S. schraderi
(Bernh.) Otálora, P. M. Jørg. & Wedin, S. sub-
tile (Schrad.) Otálora, P. M. Jørg. & Wedin,
S. tenuissimum (Dicks.) Otálora, P. M. Jørg.
& Wedin, S. teretiusculum (Wallr.) Otálora,
P. M. Jørg. & Wedin and S. turgidum(Ach.)
Otálora, P. M. Jørg. & Wedin.

Bull. Soc. Nat. luxemb. 115 (2014) 159
Ertz et al. (2014) transferred Opegrapha
gyrocarpa, O. rufescens and Lecanactis dil-
leniana to new genera, as Gyrographa gyro-
carpa (Flot.) Ertz & Tehler, Pseudoschisma-
tomma rufescens (Pers.) Ertz & Tehler and
Psoronactis dilleniana (Ach.) Ertz & Tehler.
Bendiksby & Timdal (2013) revised the
genus Hypocenomyce. Amongst the species
known from our study area, H. scalaris stays
in Hypocenomyce (it is the generic type),
whilst H. caradocensis is moved to a new
genus, as Xylopsora caradocensis (Nyl.) Ben-
diksby & Timdal.
Calatayud et al. (2013) revised the species
of Cercidospora (lichenicolous ascomycetes)
growing on Lecanora s. lat., Rhizoplaca and
Squamarina. In addition to the two species
that were already known from our study
are (C. epipolytropa and C. macrospora),
they examined a specimen from Belgium
(Ardennes district on Lecanora gisleriana)
that belongs to the new C. stenotropae Nav.-
Ros. & Hafellner ad int.
Lücking (2012) proposed the new name
Graphis inustuloides Lücking for the species
previously called Graphis britannica auct.,
sensu Staiger or Graphina anguina auct.
In our checklist area, this species is known
only from northern France (Boulogne and
Picardy districts).
Ekman & Svensson (2014) described the
new genus Brianaria S. Ekman & M. Svens-
son for the Micarea sylvicola group. Bria-
naria bauschiana (Körb.) S. Ekman & M.
Svensson, B. lutulata (Nyl.) S. Ekman & M.
Sevensson and B. sylvicola (Körb.) S. Ekman
& M. Svensson are known from our check-
list area.
Printzen (2014) studied the molecular phy-
logeny of Biatora s.lat. and transferred to this
genus two former Bacidia species known
from our checklist area: Biatora beckhau-
sii (Körb.) Tuck. and B. hemipolia (Nyl.) S.
Ekman & Printzen.
Divakar et al. (2012) described the new
genus Montanelia for the Melanelia dis-
juncta group and combined the following
species known from our checklist area:
Montanelia disjuncta (Erichsen) Divakar, A.
Crespo, Wedin & Essl., Montanelia pannifor-
mis (Nyl.) Divakar, A. Crespo, Wedin & Essl.
and Montanelia sorediata (Ach.) Divakar, A.
Crespo, Wedin & Essl.
Moncada et al. (2013) presented a molecu-
lar phylogeny of the Lobariaceae. Following
their results, the three Lobaria s. lat. species
known from our checklist area belong to dis-
tinct clades that can be recognized at generic
level: Lobaria pulmonaria (L.) Hom., Loba-
rina scrobiculata (Scop.) Cromb. and Ricaso-
lia laetevirens (Lightf.) Zahlbr.
e name Anema tumidulum P. M. Jørg.,
M. Schultz & Guttová has been validated by
Jørgensen et al. (2013), who cited a French
specimen from our checklist area.
Aptroot et al. (2014) show that Strigula sych-
nogonoides (Nitschke) R. C. Harris is closely
related to Absconditella and must be exclu-
ded from Strigula, as Geisleria sychnogono-
ides Nitschke.
Fryday et al. (2014) describe the new genus
Bryolimbia for species of the Lecidea hyp-
norum group. Two species are known from
our checklist area: Bryolimbia hypnorum
(Lib.) Fryday, Printzen & S. Ekman and B.
sanguineoatra (Wulfen) Fryday, Printzen &
S. Ekman.
Lendemer (2013) showed that the correct
name of the common Lepraria species usu-
ally called L. lobicans auct. [non Nyl.] is
Lepraria nkii (B. de Lesd.) R. C. Harris,
whilst L. lobicans Nyl. refers to the species
formerly called L. santosii Argüello & A.
Crespo.
Ertz et al. (2014) showed that Phaeosporo-
bolus is the asexual stage of Lichenostigma,
and the following species are accepted from
our checklist area: Lichenostigma maureri
Hafellner (syn. Phaeosporobolus usneae D.
Hawksw. & Hafellner), L. alpinum (R. Sant.
Alstrup & D. Hawksw.) Ertz & Diederich
and L. chlaroterae (F. Berger & Brackel)
Ertz & Diederich. Lichenostigma rugosum
G. or is transferred to Lichenothelia, as L.
rugosa (G. or) Ertz & Diederich. Species
of Lichenostigma subgen. Lichenogramma
are also closely related to Lichenothelia, but
no new combinations are proposed, as more
molecular data in this group are necessary.
Ekman et al. (2014) presented a revised
generic classication of the Pannariaceae.
Two species known from our checklist

160 Bull. Soc. Nat. luxemb. 115 (2014)
area are concerned. Moelleropsis nebulosa
is nested within Fuscopannaria, and Moel-
leropsis consequently becomes a synonym
of that genus. No nomenclatural changes are
introduced, however, pending a nal deci-
sion on a proposal to conserve the younger
Fuscopannaria against Moelleropsis. e new
generic name Pectenia is introduced for the
Degelia plumbea group, including the new
combination Pectenia plumbea (Lightf.) P.
M. Jørg., L. Lindblom, Wedin & S. Ekman.
Arup et al. (2013) presented a new taxonomy
of Teloschistaceae, based on molecular phy-
logenetic results, recognizing a total of 39
genera. Roux (2014) regrets the missing cor-
respondance between molecular results and
morphological, anatomical and chemical
characters, and considers that the splitting of
Caloplaca in so many genera is premature.
Nonetheless, we tentatively accept the new
taxonomy proposed by Arup et al. (2013).
e species of Teloschistaceae known from
our checklist area, previously included in
Caloplaca, Fulgensia, Teloschistes and Xan-
thoria, should consequently be named as:
Athallia cerinella (Nyl.) Arup, Frödén &
Søchting, A. cerinelloides (Erichsen) Arup,
Frödén & Søchting, A. holocarpa (Hom.)
Arup, Frödén & Søchting, A. pyracea (Ach.)
Arup, Frödén & Søchting, A. vitellinula
Arup, Frödén & Søchting, Blastenia coralliza
(Arup & Åkelius) Arup, Frödén & Søch-
ting, B. crenularia (With.) Arup, Frödén
& Søchting, B. ferruginea (Huds.) Arup,
Frödén & Søchting, B. herbidella (Hue)
Servít, Calogaya arnoldii (Wedd.) Arup,
Frödén & Søchting [subsp. obliterata has
not yet been combined here], C. biatorina
(A. Massal.) Arup, Frödén & Søchting, C.
decipiens (Arnold) Arup, Frödén & Søch-
ting, C. pusilla (A. Massal.) Arup, Frödén
& Søchting, Caloplaca cerina (Hedw.)  .
Fr., C. chlorina (Flot.) Sandst., C. stillicidi-
orum (Vahl) Lynge (= C. cerina var. chloro-
leuca), Cerothallia luteoalba (Turner) Arup,
Frödén & Søchting, Flavoplaca arcis (Poelt &
Vězda) Arup, Frödén & Søchting, F. citrina
(Hom.) Arup, Frödén & Søchting, F. coro -
nata (Körb.) Arup, Frödén & Søchting, F.
dichroa Arup, Frödén & Søchting, F. avoci-
trina Arup, Frödén & Søchting, F. granu l o sa
Arup, Frödén & Søchting, F. limonia (Nimis
& Poelt) Arup, Frödén & Søchting, F. marina
(Wedd.) Arup, Frödén & Søchting, F. mar i -
tima (B. de Lesd.) Arup, Frödén & Søchting,
F. microthallina (Wedd.) Arup, Frödén &
Søchting, F. oasis (A. Massal.) Arup, Frödén
& Søchting, F. polycarpa (A. Massal.) Arup,
Frödén & Søchting, Gyalolechia avorube-
scens (Huds.) Søchting, Frödén & Arup, G.
avovirescens (Wulfen) Søchting, Frödén
& Arup, G. fulgens (Sw.) Søchting, Frödén
& Arup, Leproplaca chrysodeta (Räs.) J.
Laundon, L. cirrochroa (Ach.) Arup, Frödén
& Søchting, L. xantholyta (Nyl.) Hue, Poly-
cauliona candelaria (L.) Frödén, Arup &
Søchting, P. phlogina (Ach.) Arup, Frödén
& Søchting, P. polycarpa (Hom.) Frödén,
Arup & Søchting, P. ucrainica (S. Y. Kondr.)
Frödén, Arup & Søchting, Pyrenodesmia
alociza (A. Massal.) Arnold, P. chalybaea
(Fr.) A. Massal., P. variabilis (Pers.) A.
Massal., Rufoplaca arenaria (Pers.) Arup,
Frödén & Søchting, R. subpallida (H. Magn.)
Arup, Frödén & Søchting, Rusavskia elegans
(Link) S. Y. Kondr. & Kärnefelt, Solitaria
chrysophthalma (Degel.) Arup, Frödén &
Søchting, Teloschistes chrysophthalmus (L.)
. Fr., Variospora aurantia (Pers.) Arup,
Frödén & Søchting, V. dolomiticola (Hue)
Arup, Frödén & Søchting, V. avescens
(Huds.) Arup, Frödén & Søchting, V. t h a l -
lincola (Wedd.) Arup, Frödén & Søchting,
Xanthocarpia crenulatella (Nyl.) Frödén,
Arup & Søchting, X. lactea (A. Massal.) A.
Massal., X. marmorata (Bagl.) Frödén, Arup
& Søchting, X. ochracea (Schaer.) A. Massal.
& De Not., Xanthomendoza fallax (Hepp)
Søchting, Kärnefelt & S.Y. Kondr., X. hucu-
lica (S. Y. Kondr.) Diederich, X. poeltii (S.Y.
Kondr. & Kärnefelt) Søchting, Kärnefelt &
S.Y. Kondr., Xanthoria calcicola Oxner and
X. parietina (L.) . Fr.
Six species belonging to Pyrenodesmia s. l.
are provisionally kept in Caloplaca: C. albo-
lutescens, C. atroava, C. demissa, C. ery-
throcarpa, C. soralifera and C. teicholyta.
Several species have not yet been studied
phylogenetically and are temporarily kept
in Caloplaca: C. brevilobata, Caloplaca con-
versa var. fallax, C. grimmiae, C. haematites,
C. inconnexa, C. irrubescens, C. itiana, C.
lucifuga, C. obscurella, C. ruderum, C. saxi-
cola, C. ulcerosa and C. vacillans.

Bull. Soc. Nat. luxemb. 115 (2014) 161
Frisch et al. (2014) presented a new phy-
logeny of Arthoniales, focusing on crustose
representatives. e following nomenclatu-
ral changes are necessary for the species
known from our checklist area: Alyxoria
mougeotii (A. Massal.) Ertz, Frisch & G.
or (Opegrapha mougeotii), Arthonia gran-
itophila . Fr. (Melaspilea granitophila),
Bryostigma muscigenum (. Fr.) Frisch &
G. or (Arthonia muscigena), Coniocarpon
cinnabarinum DC (Arthonia cinnabarina)
and Pachnolepia pruinata (Pers.) Frisch & G.
or (A. pruinata).
4. New or interesting reports
Aphanopsis coenosa (Ach.) Coppins & P.
James
Belgium, Ard.: S of Verviers, Spa, N side of village
(G7.28), terricolous in old churchyard, 2014, van
den Boom 51289 (h).
New to the checklist area.
Bacidia carneoglauca (Nyl.) A. L. Smith
Luxembourg, Ard.: Ufer der Our südöstlich
von Heinerscheid (J8.45), auf gelegentlich
überspültem Silikatstein, 2014, Cezanne & Eichler
9419 (herb. Diederich; with Bacidia trachona).
is species was known from two Belgian
localities in the Meuse and Ard. districts,
always at water level by rivers (van den
Boom et al. 1999). New to Luxembourg.
Bacidia friesiana (Hepp) Körb.
Belgium, Fl.: Heindonk (Willebroek), natural
reserve Kleine Bergen (D4.16), on Sambucus
nigra, 2012, Van den Broeck 5482 (BR). Brab.:
Oudenaarde, bos ’t Ename, Grootbos zuid (E3.21),
on S. nigra, 2012, Van den Broeck 5476 (BR);
Ganshoren, Koning Boudewijnpark, willow marsh
(E4.14), on S. nigra, 2012, Van den Broeck 5480
(BR). Mosan: W of Dinant, WSW of Anhée, E
of Sosoye, Le Marteau, near ruin of Château du
Montaigle (H5.35), on Sambucus, 2007, van den
Boom 37484 (h).
is rare species was previously known from
only one locality in the Meuse district were
it was also found on Sambucus (Ertz et al.
2008). e discovery of four new localities
suggests that the species must be widespread
and common in our study area, but over-
looked.
Biatora eorescens (Hedl.) Räsänen
Luxembourg, Lorr.: Naturwaldreservat “Haard”
südwestlich Dudelange, Nordrand (M8.54), on
Fagus sylvatica, 2012, Cezanne & Eichler 8749
(herb. Diederich).
e specimen is small, but its identity leaves
no doubt, as argopsin has been detected
by thin-layer chromatography. New to the
checklist area.
Burgoa splendens Diederich & Coppins
Belgium, Ard.: Herbeumont, rive droite de la
Semois, Tombeau du chevalier (L6.25), on Fagus,
1992, Sérusiaux (LG); ibid., 2008, Sérusiaux,
Fischer & Killmann (LG).
is species was described as a bulbilliferous
basidiomycete overgrowing bark and cor-
ticolous bryophytes (Diederich & Lawrey
2007). Recent re-examination of several
specimens led to the hypothesis that the spe-
cies is lichenized and belongs to the Asco-
mycetes. Molecular data are needed to check
this hypothesis. e species was previously
known only from the British Isles, mainly
in forests with a long historical continu-
ity. Its discovery in the Belgian Ardennes
is remarkable, as these forests harbor many
species with an oceanic or atlantic distribu-
tion, such as Gyalideopsis muscicola, Micarea
pycnidiophora or Tylophoron hibernicum,
which are all very rare in our study area.
New to the checklist area.
Caloplaca soralifera Vondrák & Hrouzek
Luxembourg, Lorr.: Hamm, rocher au-dessus
du carrefour de la rue Godchaux (piste cyclable)
avec la rue des Draperies (M8.26), sur une surface
horizontale ensoleillée en grès, 1997, Diederich
13422 (h); Lorentzweiler, Roude Bam (L8.46), sur
un mur en béton, 1997, Diederich 12476b (h).
is species belongs to Pyrenodesmia s. l.,
but is provisionally le in Caloplaca by Arup
et al. (2013). New to the checklist area.
Cornutispora ciliata Kalb
Belgium, Ard.: S of Verviers, Spa, SE of village,
near aerodrome, W of route de la Sauveniere
(G8.21), on Betula in forest, on Cladonia, 2014,
van den Boom 51285 (h).
Lichenicolous coelomycete, previously known
from Luxembourg (van den Boom et al. 1996),
new to Belgium.

162 Bull. Soc. Nat. luxemb. 115 (2014)
Enchylium limosum (Ach.) Otálora, P. M. Jørg.
& Wedin [= Collema limosum (Ach.) Ach.]
Luxembourg, Lorr.: WNW von Ahn, Gëldebierg
(M9.12), Wegrand, auf oener, lehmiger Erde,
2014, Cezanne-Eichler 9575 (herb. Diederich).
New to Luxembourg.
Flavoplaca limonia (Nimis & Poelt) Arup,
Frödén & Søchting [= Caloplaca l. Nimis &
Poelt]
Belgium, Mar.: Au SW de Veurne, à l’ouest de
Bulskamp, St. Gustaafmolen (D0.27), sur mortier
entre les pierres d’un vieux moulin à vent, 2002,
Diederich 15248 (h). Mosan: Aywaille, rive droite
de l’Amblève, château d’Amblève (G7.24), bloc
calcaire exposé, 1982, Malaise 82/152-198 (LG).
France, Mar.: Pas-de-Calais: Cap Gris Nez, à 400
m à l’W de la plage au N de Framzelle, rochers à
mi-pente (E22.15), blocs de grès dans végétation
herbacée, 2000, Diederich 14453 (h); N of Cran
aux Oeufs, Pointe du Riden (E22.14), falaise
maritime gréseuse, 10.1973, Sérusiaux 775 (LG);
Cran aux Oeufs (E22.14), rocky seashore cli with
sandstone rock, 4.1983, Sérusiaux 4728, 4729
(LG). Pic.: Somme, à 6 km au NW d’Abbeville,
Port-le-Grand, grande ferme fortiée au centre
du village (J22.17), sur un mur, 2001, Diederich
15409 (h). Lorr.: Meuse, Montmédy, citadelle
(M6.48), sur un mur, 2004, Diederich 15984 (h).
New to the checklist area.
Lempholemma chalazanum (Ach.) B. de Lesd.
Luxembourg, Lorr.: Aufgelassenes Abbaugelände
nordwestlich von Steinfort (L8.51), auf Erde,
2012, Cezanne-Eichler 8855 (herb. Diederich).
New to Luxembourg.
Lichenothelia convexa Henssen
Luxembourg, Lorr.: Lorentzweiler, Roude Bam
(L8.46), sur un toit en schistes, 1988, Diederich
8890 (h); ibid., 2013, Diederich 17491 (h).
Non-lichenized ascomycete (usually stud-
ied by lichenologists and therefore included
here), new to Luxembourg.
Phaeographis dendritica (Ach.) Müll. Arg.
Belgium, Brab.: Laplaigne (Brunehaut), Coupure
de Laplaigne, old plantation of Populus (G2.25),
on Alnus glutinosa, 2012, Van den Broeck 5308
(BR).
A remarkable and unexpected discovery of
a species that had only once been published
from Belgium (Brab., near Mons), where it
was considered as being extinct since 1900
(Diederich et al. 2014).
Phaeographis inusta (Ach.) Müll. Arg.
Belgium, Ard.: Herbeumont, dans la boucle de
la Semois au sud du village, sur les deux rives
(L6.25), sur Carpinus et Fagus, 2013, P. Diederich
17631 (h) & E. Sérusiaux.
A very rare species that was previously
known from a single Belgian locality, also
in the Ardennes (van den Boom et al. 1999).
Phaeophyscia chloantha (Ach.) Moberg
[= Physciella chloantha (Ach.) Essl.]
Belgium, Brab.: Ganshoren, Koning Boudewijn-
park, willow marsh (E4.14), on Salix ×charferri,
2012, D. Van den Broeck 5481 (BR).
e discovery of this species was completely
unexpected, as it was considered as extinct
in the study area since 1868 (Diederich et
al. 2014). Recently three thalli were found in
the Brussels Capital Region on an exposed
branch of Salix ×charferri. In the eld Phaeo-
physcia chloantha resembles Physcia tenella.
It bears the same colour and abundant labri-
form soralia, but the marginal cilia are miss-
ing and the lobes are much broader. More-
over the cortex and medulla are K–. e lower
surface of the thallus is whitish with sparse,
simple to forked, whitish rhizines sometimes
protruding beyond the margins. e species
has a wide distribution since it is known from
North America, Europe, Asia and East Africa,
although it has never been reported from
Great Britain, Ireland or the Netherlands.
Phoma physciicola Keissler
Luxembourg, Lorr.: A l’ouest de Steinfort,
anciennes carrières, dans la réserve naturelle
(L8.51), sur branches de Salix caprea, sur Physcia
aipolia, 2012, Diederich 17482 (h).
France, Lorr.: Meuse, au SE de Montmédy,
Marville, cimetière de St Hilaire (N7.11), sur
branches de Salix, sur Physcia aipolia, 2013,
Diederich 17724 (h)
Lichenicolous coelomycete, new to the
checklist area.
Polycoccum pulvinatum (Eitner) R. Sant.
Belgium, Camp.: ESE of Lommel, S of Overpelt,
Steenovenstraat, churchyard (C6.38), on

Bull. Soc. Nat. luxemb. 115 (2014) 163
gravestones, on Physcia caesia, 2013, van den
Boom 50084 (h); Baarle-Hertog, enclave-area,
churchyard (B5.18), on gravestones, on P.
caesia, 2014, van den Boom 50261 (h); Poppel,
churchyard (B6.11), on gravestones, on P. caesia,
2014, van den Boom 50263 (h).
Lichenicolous ascomycete, new to Belgium.
Polycoccum slaptoniense D. Hawksw.
Luxembourg, Lorr.: NW von Ahn, am Wegrand
W von Kräizuet (M9.12), on Xanthoria parietina,
2014, Cezanne-Eichler 9590 (herb. Diederich).
Lichenocolous ascomycete, new to Luxem-
bourg.
Rinodina pityrea Ropin & Mayrhofer
Luxembourg, Lorr.: Strassen, Tossebierg, old
sandstone quarry (M8.14), on Sambucus, 2014,
Diederich 17753 (h).
New to Luxembourg.
elenella muscorum (Fr.) Vain. [= Chro-
matochlamys m. (Fr.) H. Mayrhofer & Poelt]
Luxembourg, Lorr.: W von Moersdorf,
Kalkschutthalde am ‘Deiwelskopp’ (L9.34), auf
Moosen über Kalkblock, 2014, Cezanne-Eichler
9585 (h, herb. Diederich).
New to Luxembourg.
elopsis rubella Nyl.
Belgium, Ard.: Rochefort, au SE de la ville, grottes
de Lorette (J6.15), on Tilia, 2013, Ertz 18094 (BR)
A very rare corticolous lichen, mainly grow-
ing on old trees, previously known from one
locality in Luxembourg and one in northern
France (Eichler et al. 2010). New to Belgium.
Tremella wirthii Diederich
Belgium, Ard.: Rochefort, au SE de la ville, grottes
de Lorette (J6.15), on Tilia, on Protoparmelia sp.,
2013, Ertz 18092 (BR)
Lichenicolous basidiomycete, new to the
checklist area.
Usnea glabrescens (Vain.) Räsänen var. gla-
brescens
Luxembourg, Lorr.: SW of Dudelange, réserve
forestière intégrale ‘Haard’ (M8.54), on Fagus,
2012, Eichler & Cezanne 8744 (hb Diederich).
New to the checklist area.
Usnea fulvoreagens (Räsänen) Räsänen, a
rare species in south-eastern Belgium and
Luxembourg, is now sometimes consid-
ered as a subspecies of U. glabrescens: U. g.
var. fulvoreagens Räsänen (e.g., Wirth et al.
2013).
Xanthomendoza huculica (S. Y. Kondr.)
Diederich comb. nov.
Basionym: Oxneria huculica S. Y. Kondr., in
Kondratyuk et al.: Diagnoses of new taxa, in
Oksner: Flora lišajnikiv Ukraini y dvoch tomach,
Tom 2, Vypusk 3: 435 (2010).
MycoBank MB809872
is species has recently been published as
new for Belgium (Van den Broeck 2013a).
As Oxneria S. Y. Kondr. & Kärnefelt is a
synonym of Xanthomendoza S. Y. Kondr.
& Kärnefelt (see Arup et al. 2013), the new
combination is necessary.
Xanthomendoza oregana (Gyeln.) Søch-
ting, Kärnefelt & S. Y. Kondr. [= X. poeltii (S.
Y. Kondr. & Kärnefelt) Søchting, Kärnefelt &
S.Y. Kondr.]
All specimens from the checklist area pre-
viously published as Xanthoria ulophyllodes
by Sérusiaux et al. (2003) proved to belong
X. oregana, of which X. poeltii has recently
been recognized as representing a younger
synonym (Lindblom & Blom (2014). Xan-
thomendoza oregana is new to the checklist
area, whilst Xanthoria ulophyllodes has to be
deleted from the checklist.
Zwackhiomyces physciicola Alstrup
Belgium, Camp.: Lommel, SE of village,
churchyard (C6.27), on concrete, on Physcia
caesia, 2013, van den Boom 50077 (h).
e ascospores are longer than in the origi-
nal description, c. 25 × 5.5–6 µm, versus
18–22 × 5.5–6.5 µm (Alstrup 1993). Licheni-
colous ascomycete, new to Belgium.
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