Report on two lichenological field meetings in Luxembourg in 2011 and 2012

Abstract

During two lichenological field meetings in Luxembourg, a total of 379 species of lichens and lichenicolous fungi were recorded in 14 localities. Caloplaca conversa var. fallax and Zwackhiomyces peltigerae are new for the checklist of Belgium, Luxembourg and northern France. Seven further species are reported as new to Luxembourg: Acarospora nitrophila, Buellia ocellata, Caloplaca cerinelloides, Collema polycarpon, Lecanora barkmaniana, Scoliciosporum sarothamni and Tremella caloplacae. Telogalla olivieri was rediscovered in the country after more than 160 years and Caloplaca ferruginea after more than 120 years.

Full text

Bull. Soc. Nat. luxemb. 114 (2013) 65
Report on two lichenological eld meetings in Luxembourg
in 2011 and 2012
Dries Van den Broeck1, Paul Diederich2 & Damien Ertz1
1 National Botanical Garden of Belgium, Domein van Bouchout, B-1860 Meise, Belgium (dries.van.den.broeck@
br.fgov.be; damien.ertz@br.fgov.be)
2 Musée national d’histoire naturelle, 25 rue Munster, L-2160 Luxembourg, Luxembourg (paul.diederich@education.lu)
Van den Broeck, D., P. Diederich & D. Ertz, 2013. Report on two lichenological eld meet-
ings in Luxembourg in 2011 and 2012. Bulletin de la Société des naturalistes luxembourgeois
114: 65-76.
Abstract. During two lichenological eld meetings in Luxembourg, a total of 379 species of
lichens and lichenicolous fungi were recorded in 14 localities. Caloplaca conversa var. fallax
and Zwackhiomyces peltigerae are new for the checklist of Belgium, Luxembourg and northern
France. Seven further species are reported as new to Luxembourg: Acarospora nit rophila, Buellia
ocellata, Caloplaca cerinelloides, Collema polycarpon, Lecanora barkmaniana, Scoliciosporum
sarothamni and Tremella caloplacae. Telogalla olivieri was rediscovered in the country aer
more than 160 years and Caloplaca ferruginea aer more than 120 years.
1. Introduction
In September 2011 and 2012, two lichenological
eld meetings were organized in Luxembourg.
Fourteen localities in the phytogeographical
Ardenne and Lorraine districts were visited.
In most localities, a rather complete inven-
tory of lichens and lichenicolous fungi was
carried out. Herbarium specimens of rare or
critical species are kept in BR or in the private
herbaria of the authors (abbreviated as ‘h’).
e purpose of this paper is to provide a list
per locality of the recorded taxa (Table 1) and
to comment on the most interesting species.
e participants of the 2011 eld meeting were:
André Aptroot, Paul Diederich, Jean-Pierre
Duvivier, Damien Ertz, Christian Fontaine,
Ghislaine Loiselet, Bernadette Mora, Henk
Siebel, Laurens Sparrius, Leo Spier, Henk Tim-
merman, Dries Van den Broeck, Klaas Van
Dort, Maaike Vervoort and Micheline Wegh.
e participants of the 2012 eld meeting
were: Paul Diederich, Jean-Pierre Duvivier,
Damien Ertz, Bernadette Mora, Dries Van
den Broeck and Micheline Wegh.
2. Locality list
Grid data refer to the so-called IFBL system,
commonly used in the area of study.
1. Luxembourg, phytogeographical Ardenne dis-
trict (Ard.), Hoscheid, Molberlee, future nature
reserve ‘Hoscheid-Molberlay’ (K8.24, 49°56’50–56”
N, 6°03’47”–04’18” E, alt. 300–400 m), 2.9.2011.
2. Luxembourg, Ard., Hoscheid, valley of
Schlënner W of Molberlee (K8.24, 49°56’49–57”
N, 6°03’46–56” E, alt. 310 m), 2.9.2011.
3. Luxembourg, Ard., Hoscheid, road to Uew-
erschlënner (K8.24, 49°57’05”–24” N, 6°03’48”–
04’20”; 320–430 m), 2.9.2011.
4. Luxembourg, Ard., Lellingen, valley of
Lellgerbaach, Bärel, future nature reserve ‘Lel-
lingen-Fréng/Bärel’ (K8.13, 49°59’15–29” N,
6°01’12–49” E, alt. 310–400 m), 3.9.2011.
5. Luxembourg, Ard., Bourscheid, walls and
rocks around castle (K8.34, 49°54’18–22” N,
6°04’41–50” E, alt. 340–350 m), 4.9.2011.
6. Luxembourg, Ard., Bourscheid, Ënnescht
Fuusslee, siliceous outcrops (K8.34, 49°54’38” N,
6°05’04” E, alt. 270 m), 4.9.2011.
7. Luxembourg, Ard., Bourscheid, Iewescht
Fuusslee, siliceous outcrops (K8.34, 49°54’25”N,
6°04’54” E, alt. 310 m), 4.9.2011.
8. Luxembourg , Ard., Bourscheid, wood with
shadowed siliceous rocks close to Iewescht Fuusslee
(K8.34, 49°54’25”N, 6°04’52” E, alt. 310 m), 4.9.2011.
9. Luxembourg, Ard., Enscherange, camping site
‘Val d’Or’ (K8.13, 50°00’01”N, 5°59’27”E, alt 315
m), 4.9.2011.
10. Luxembourg, phytogeographical Lorraine dis-
trict (Lorr.), S of Pétange, Prënzebierg, nature reserve
‘Prënzebierg’, disused iron quarry (M8.31, 49°32’42–
48” N, 5°52’10–36” E, alt. 340–375 m), 7.9.2012.

66 Bull. Soc. Nat. luxemb. 114 (2013)
11. Luxembourg, Lorr., S of Pétange, Fuussbësch
and Giele Botter, nature reserve ‘Prënzebierg’,
disused iron quarry (M8.31, 49°32’20–46” N,
5°52’16–57” E, alt. 370–390 m), 7.9.2012.
12. Luxembourg, Lorr., SW of Belvaux, along
road E and SE of Metzerbierg, disused iron
quarry (M8.41, 49°30’06–22” N, 5°54’25–50” E,
alt. 390–400 m), 8.9.2012.
13. Luxembourg, Lorr., S of Obercorn, Kie-
merchen, future nature reserve ‘Dierdange-
Kiemerchen/Scheiergrond’, disused iron quarry
(M8.51, 49°29’49”–30’03” N, 5°53’10”–54’00” E,
alt. 375–390 m), 8.9.2012.
14. Luxembourg, Lorr., SE of Esch-sur-Alzette,
future nature reserve ‘Esch-Lallengerbierg’,
disused iron quarry (M8.53, 49°29’09–31” N,
5°59’56”–6°00’30” E, alt. 340–370 m), 9.9.2012.
3. Species list
See Table 1.
Table 1. List of lichens and lichenicolous fungi recorded during the eld meetings in Luxem-
bourg in 2011 and 2012. For each species only the most common substrate is mentioned. e
nomenclature follows Diederich et al. (2013).
*identication has been conrmed by TLC
as: asphalt roof shingles, co: concrete, me: metal, mo: mortar, mos: mosses, ro: calcareous rock, si: sili-
ceous rock, sl: slate, sm: saxicolous mosses, so: soil, wo: wood
Ac: Acer, Al: Alnus, Be: Betula, Ca: Carpinus, Co: Corylus, Cor: Cornus, Cr: Crataegus, Cy: Cytisus, Fa:
Fagus, Fr: Fraxinus, La: Larix, Pi: Picea abies, Po: Populus, Pr: Prunus spinosa, Qu, Quercus, Ro: Rosa,
Sal: Salix, Sam: Sambucus, Sar: Sarothamnus, So: Sorbus, T: Tilia
Acc: Aspicilia caesiocinerea, Bab: Bacidia bagliettoana, Cas: Calicium salicinum, Cl: Cladonia, Clp: Clado-
nia pocillum, Clr: C. rangiferina, Cls: C. subulata, Dis: Diploschistes scruposus, Evp: Evernia prunastri, Grs:
Graphis scripta, Hyp: Hypogymnia physodes, Hys: Hypocenomyce scalaris, Lea: Lecanora carpinea, Lec: L.
chlarotera, Led: L. dispersa, Les: L. saligna, Pas: Parmelia sulcata, Pe: Peltigera, Pee: Peltigera extenuata,
Pep: P. praetextata, Per: P. rufescens, Ph: Physcia, Pha: Physcia adscendens, Phc: P. caesia, Pho: Phaeophy-
scia orbicularis, Phs: Physcia stellaris, Pht: P. tenella, Pot: Porpidia tuberculosa, Psl: Psilolechia lucida, Ven:
Verrucaria nigrescens, Vif: Violella fucata, Xac: Xanthoparmelia conspersa, Xap: Xanthoria parietina
1 2 3 4 5 6 7 8 9 10 11 12 13 14
Acarospora fuscata si si sl
Acarospora glaucocarpa var. conspersa ro ro ro
Acarospora moenium ro ro ro
Acarospora nitrophila si
Acremonium antarcticum Myf
Agonimia tristicula si si
Agonimia vouauxii mos so
Alyxoria varia Qu
Anisomeridium polypori Po Ac Qu
Arthonia atra Ca
Arthonia didyma Ca Qu Fa
Arthonia lecanorina Led
Arthonia molendoi Xap Xap Xap Xap
Arthonia punctiformis Be
Arthonia radiata Qu Qu Fa Cr Cr Co Sal Fr
Arthonia spadicea Qu Ac Qu
Arthonia vinosa Qu Qu
Arthopyrenia analepta Qu Be So Co
Arthrorhaphis citrinella si si
Aspicilia caesiocinerea si si si si si
Aspicilia contorta subsp. contorta co ro ro ro
Athelia arachnoidea Pht Xap Ac

Bull. Soc. Nat. luxemb. 114 (2013) 67
1 2 3 4 5 6 7 8 9 10 11 12 13 14
Bacidia arceutina Ac
Bacidia bagliettoana so
Bacidia biatorina Qu
Bacidia rubella Qu
Bacidia viridifarinosa si
Bacidina caligans mo so
Bacidina chloroticula Qu
Bacidina sulphurella Qu Ac
Baeomyces rufus si si si
Biatora globulosa Qu
Bilimbia sabuletorum ro ro ro
Botryolepraria lesdainii ro
Bryoria subcana Qu
Buellia aethalea si si
Buellia badia si so
Buellia griseovirens Ca Ca Qu Sal Sal Sal
Buellia ocellata si
Buellia punctata Qu Ac Ac
Buellia schaereri Qu
Calicium adspersum Qu Qu
Calicium glaucellum Qu wo wo
Calicium salicinum wo wo
Calicium viride Qu Qu
Caloplaca arcis mo
Caloplaca cerina Sam
Caloplaca cerinella Po Po
Caloplaca cerinelloides Po Sal Fr
Caloplaca chlorina si
Caloplaca chrysodeta ro
Caloplaca citrina mo Fr
Caloplaca conversa var. fallax si
Caloplaca crenulatella si
Caloplaca decipiens ro
Caloplaca ferruginea Sal
Caloplaca avescens si ro
Caloplaca avocitrina si co ro ro ro ro
Caloplaca avovirescens ro
Caloplaca holocarpa si
Caloplaca oasis si co ro
Caloplaca pyracea Po Po
Caloplaca ruderum mo ro
Caloplaca saxicola s.lat. si
Caloplaca subpallida si si
Caloplaca teicholyta mo
Candelariella aurella si si mo co ro ro ro
Candelariella reexa Qu Qu Qu Sal Cr Sal Qu
Candelariella vitellina si si si si si as Sal Sal
Candelariella xanthostigma Qu Qu Po Sal Sal
Capronia peltigerae Pel
Catillaria chalybeia si si sl ro ro
Catillaria nigroclavata Sal Qu Ac

68 Bull. Soc. Nat. luxemb. 114 (2013)
1 2 3 4 5 6 7 8 9 10 11 12 13 14
Cetraria aculeata so
Chaenotheca brunneola wo
Chaenotheca chlorella wo
Chaenotheca chrysocephala Qu Qu
Chaenotheca ferruginea Qu wo Pi Qu Qu La
Chaenotheca furfuracea Qu si si
Chaenotheca trichialis wo wo
Chaenothecopsis vainioana Cas
Chrysothrix candelaris Qu Qu
Chrysothrix chlorina si si
Cladonia arbuscula so so si
Cladonia borealis so si
Cladonia caespiticia Qu so si Qu
Cladonia cervicornis so so si
Cladonia chlorophaea Qu
Cladonia ciliata so so
Cladonia coccifera so si si
Cladonia coniocraea Qu wo wo
Cladonia crispata so
Cladonia cyathomorpha so si si
Cladonia digitata Qu wo
Cladonia mbriata Qu mos si Qu so so
Cladonia oerkeana so wo si
Cladonia foliacea so
Cladonia furcata subsp. furcata so so si si so
Cladonia gracilis so so si si
Cladonia grayi so so so
Cladonia humilis so si so
Cladonia macilenta s.str.so wo si
Cladonia ochrochlora wo
Cladonia phyllophora so
Cladonia polydactyla Qu si
Cladonia portentosa so so so
Cladonia pyxidata subsp. pocillum so so so ro
Cladonia pyxidata subsp. pyxidata si so ro ro
Cladonia ramulosa so so si si
Cladonia rangiferina si
Cladonia rangiformis so so so so ro
Cladonia rei so
Cladonia scabriuscula so
Cladonia squamosa Qu
Cladonia strepsilis so so
Cladonia subulata so so si si so so
Cladonia uncialis subsp. biuncialis so si
Cladonia verticillata so si
Clauzadea monticola ro
Clypeococcum hypocenomycis Hys
Coenogonium pineti Qu Qu Pi La
Collema auriforme si
Collema crispum so so so ro
Collema accidum si

Bull. Soc. Nat. luxemb. 114 (2013) 69
1 2 3 4 5 6 7 8 9 10 11 12 13 14
Collema fuscovirens si
Collema polycarpon si
Collema tenax so so so ro
Corticifraga fuckelii Pel Pel
Cyrtidula quercus Qu
Dendrographa latebrarum si
Dermatocarpon luridum si
Dibaeis baeomyces si so si
Diploschistes muscorum Cl Cl Cl Clp
Diploschistes scruposus si si si si
Diplotomma alboatrum si
Endococcus brachysporus Pot
Enterographa hutchinsiae si
Enterographa zonata si si si si
Evernia prunastri Qu Ca Ac Qu So La Qu Pr me
Flavoparmelia caperata Qu Ca Ac Cr Po Ac
Flavoparmelia soredians So
Fuscidea lightfootii So Qu Fr
Graphis scripta s. lat. Co Ca Ca Co
Graphium aphthosae Per
Haematomma ochroleucum si
Hainesia xanthoriae Xap Xap Xap
Halecania viridescens Qu Sal Qu
Hawksworthiana peltigericola Pe
Hypocenomyce scalaris Qu wo wo La
Hypogymnia physodes Qu Qu So Qu So Pi Sal me
Hypogymnia tubulosa Qu So Fr La Cr Po me
Hypotrachyna afrorevoluta Ca La Sal Ac
Hypotrachyna revoluta Qu Sal
Illosporiopsis christiansenii Pht Pha Sal Ph Xap Sal
Jamesiella anastomosans wo wo
Lecania cyrtella Sal Sal Ac
Lecania erysibe mo
Lecania inundata ro ro
Lecania naegelii Fr Sam Cor Sal Qu Ac
Lecanora albella Qu
Lecanora albescens si co co ro ro ro
Lecanora antiqua si
Lecanora barkmaniana Sal
Lecanora campestris si co ro
Lecanora carpinea Ca Cr Qu Fr Be Cr Sal Pr Fr
Lecanora chlarotera Qu Ac So Cor Qu Sal Pr Qu
Lecanora conizaeoides Be Be
Lecanora crenulata ro
Lecanora dispersa si Po Sal
Lecanora expallens Qu wo Ti Qu So Be Ac
Lecanora hagenii si
Lecanora horiza Po
Lecanora intumescens Ca Ac
Lecanora muralis si sl ro ro ro ro
Lecanora orosthea si si

70 Bull. Soc. Nat. luxemb. 114 (2013)
1 2 3 4 5 6 7 8 9 10 11 12 13 14
Lecanora persimilis Sal
Lecanora polytropa si si si
Lecanora pulicaris Qu Qu Qu Qu
Lecanora saligna wo
Lecanora semipallida si ro ro
Lecanora subcarnea si si
Lecanora subcarpinea Qu
Lecanora symmicta Cy Al Qu Qu Fr Sal Be Ac
Lecidea fuscoatra si si si
Lecidella carpathica si ro
Lecidella elaeochroma Cy Ca Ac Fr Be Cr Sal Pr Fr
Lecidella avosorediata Sal Sal Ac
Lecidella scabra si
Lecidella stigmatea si si co co ro ro
Lempholemma polyanthes ro
Lepraria borealis si*
Lepraria incana Qu Ca si Qu Pi La
Lepraria lobicans so Ca si Qu Fr Ac Sal
Lepraria membranacea si Qu si si
Lepraria rigidula Qu Ca Qu La Sal Sal Ac
Leprocaulon microscopicum si si si
Leptogium gelatinosum sm so
Leptogium magnussonii si
Leptogium pulvinatum so ro ro
Leptogium subtile sm ro
Leptogium teretiusculum Per
Leptogium turgidum mo ro
Leptorhaphis epidermidis Be
Lichenochora cf. weillei Pha
Lichenochora obscuroides Pho
Lichenoconium aeruginosum Clp
Lichenoconium erodens Pas Hyp Evp
Lichenoconium lecanorae Lea
Lichenoconium lichenicola Pha
Lichenoconium usneae Clp
Lichenoconium xanthoriae Xap
Lichenodiplis lecanorae Les
Lichenostigma cosmopolites Xac Xac
Lichenostigma chlaroterae Al
Lichenostigma elongatum Acc
Lichenothelia rugosa Dis Dis Dis
Marchandiobasidium aurantiacum Pht Pht Pht Pht Pht
Melanelixia glabratula Qu Ca Qu La Sal Be Ac
Melanelixia subaurifera Qu Qu Qu Qu So Ba Sal Pr me
Melanohalea elegantula Cr
Melanohalea exasperata Sal
Melanohalea exasperatula Ac Fr La Cr Sal Sal me
Micarea denigrata wo
Micarea leprosula so si
Micarea lignaria var. lignaria si si
Micarea lutulata si

Bull. Soc. Nat. luxemb. 114 (2013) 71
1 2 3 4 5 6 7 8 9 10 11 12 13 14
Micarea micrococca Qu
Micarea prasina wo Fr
Micarea sylvicola si si
Microcalicium arenarium Psl
Violella fucata Ca Ca Qu
Nectriopsis lecanodes Pe
Neolamya peltigerae Pee
Ochrolechia microstictoides Qu Qu
Ochrolechia turneri Qu
Opegrapha gyrocarpa si
Opegrapha niveoatra Qu Ca
Opegrapha rufescens Ca Ca Qu Fr Fr Ac
Opegrapha vermicellifera Qu
Parmelia ernstiae Qu
Parmelia saxatilis Qu Ca Ac Qu La Sal Ac
Parmelia sulcata Qu Ca Qu So La Cr Sal Pr me
Parmelina pastillifera Sal
Parmeliopsis ambigua Ca Ca Ti Qu
Parmotrema perlatum Qu Qu Sal Sal Ac
Peltigera canina si so si so so ro
Peltigera didactyla si Sal so so
Peltigera extenuata so so
Peltigera membranacea so so so so
Peltigera neckeri so si Sal
Peltigera ponojensis so si so so so so
Peltigera praetextata si mos si Sal so so
Peltigera rufescens so so so Sal so so so ro
Pertusaria albescens Qu Qu Ac
Pertusaria amara Qu Ca Qu
Pertusaria coccodes Qu Qu Qu
Pertusaria corallina si
Pertusaria avida Qu Qu
Pertusaria hymenea Qu
Pertusaria leioplaca Ca Ca
Pertusaria pertusa Qu
Pezizella epithallina Per
Phacopsis fusca Xac
Phaeophyscia nigricans si
Phaeophyscia orbicularis Sam si Fr Sal Sal Ac
Phlyctis argena Co Ca Ac Qu So Ac Cr Sal Sal Fr
Physcia tenella Qu Qu Ac Qu Fr La Cr Sal Pr me
Physcia adscendens Qu Sal Cr si Fr Cr Cr Sal Pr Fr
Physcia aipolia Qu Cr Cr Cr Sal Pr Cr
Physcia caesia Qu co ro
Physcia dubia var. teretiuscula si
Physcia stellaris Sal Sal me
Physconia distorta Sal Sal Ac
Physconia enteroxantha Qu Ac
Physconia grisea Sam Ac
Placidium squamulosum so
Placopyrenium fuscellum ro Ven

72 Bull. Soc. Nat. luxemb. 114 (2013)
1 2 3 4 5 6 7 8 9 10 11 12 13 14
Placynthiella icmalea so wo si La wo wo
Placynthiella oligotropha si
Placynthium nigrum ro ro ro ro
Platismatia glauca Qu Ca Ac Qu Fr Sal Ac
Pleurosticta acetabulum Fr Sal Ac
Polycoccum pulvinatum Phc
Polysporina simplex si si sl
Porina aenea Ca Ca Qu Ac Fr Ac
Porina chlorotica si si si si si
Porina leptalea Ca Ca
Porocyphus coccodes ro
Porpidia crustulata si si
Porpidia rugosa si
Porpidia soredizodes si si
Porpidia tuberculosa si si si
Pronectria robergei Pep Pel Pel
Protoblastenia rupestris si ro ro
Pseudevernia furfuracea Qu Pr Qu Sal
Psilolechia lucida si si si si
Punctelia borreri Sal Sal
Punctelia jeckeri Qu Ca Qu Fr Cr Ac
Punctelia subrudecta Qu Ti So Cr Co Ac
Pycnothelia papillaria so so
Pyrenochaeta xanthoriae Xap Xap
Pyrrhospora quernea Ca Qu
Racodium rupestre si si
Ramalina farinacea Qu Ac Qu Fr La Sal Fr
Ramalina fastigiata Sal Fr
Ramalina fraxinea Sal Sal Ac
Reichlingia leopoldii si si si
Rhizocarpon geographicum si si si as
Rhizocarpon lecanorinum si si si
Rhizocarpon reductum si si si si as
Rhizocarpon viridiatrum si
Rinodina aspersa si
Rinodina bischoi ro
Rinodina eorescens Qu Qu Qu
Rinodina oleae si
Ropalospora viridis Ca Ca Be
Roselliniella cladoniae Clr Clp Clp Clp
Sarcogyne regularis co co ro ro
Sarcosagium campestre s.lat. ro
Scoliciosporum sarothamni Sar
Scoliciosporum umbrinum si Be
Sphaerellothecium cladoniae Clp Clp
Sphaerellothecium propinquellum Led
Steinia geophana Per
Stenocybe pullatula Al
Stigmidium microspilum Grs
Stigmidium xanthoparmeliarum Xac
Syzygospora physciacearum Pha Pht Pht Pht Pht Phs Pht

Bull. Soc. Nat. luxemb. 114 (2013) 73
1 2 3 4 5 6 7 8 9 10 11 12 13 14
Taeniolella phaeophysciae Pho
Telogalla olivieri Xap Xap Xap
Tephromela atra si
elocarpon intermediellum wo
Toninia sedifolia so
Trapelia coarctata si si si
Trapelia corticola Qu
Trapelia glebulosa si si si si
Trapelia obtegens si
Trapelia placodioides si si
Trapeliopsis exuosa wo wo
Trapeliopsis granulosa Qu wo si wo
Trapeliopsis pseudogranulosa si
Tremella caloplacae Xap Xap Xap Xap
Tremella cladoniae Cls
Tremella hypogymniae Hyp
Tuckermannopsis chlorophylla Qu
Unguiculariopsis thallophila Lec Lec
Usnea lipendula Qu
Usnea orida Qu Ac
Usnea fulvoreagens Qu
Usnea hirta Qu* Qu
Usnea suboridana Qu Fr
Varicellaria hemisphaerica Qu Qu
Varicellaria lactea si si
Verrucaria aquatilis si
Verrucaria bryoctona Per so
Verrucaria dolosa si
Verrucaria elaeina si
Verrucaria macrostoma ro
Verrucaria muralis si ro ro ro
Verrucaria nigrescens si co co ro ro
Verrucaria ochrostoma co
Verrucaria praetermissa si
Verrucaria viridula ro ro
Vezdaea retigera Per
Violella fucata Ca Ca Ca
Xanthoparmelia conspersa si si si si
Xanthoparmelia loxodes si si si
Xanthoparmelia mougeotii si si
Xanthoparmelia pulla si si
Xanthoparmelia stenophylla si
Xanthoria candelaria wo
Xanthoria elegans si ro
Xanthoria fallax si
Xanthoria parietina Cy Cr si Qu Fr Cr Cr Sal Pr me
Xanthoria polycarpa Cy wo Qu Qu Cr Cr Sal Pr Ro
Xanthoriicola physciae Xap Xap Xap Xap
Zwackhia viridis Ti
Zwackhiomyces peltigerae Per
Zwackhiomyces socialis Bac

74 Bull. Soc. Nat. luxemb. 114 (2013)
4. Comments on interesting species
Several interesting records were already
published by Diederich et al. (2012) and
will not be repeated here. is mainly con-
cerns Caloplaca arcis (Poelt & Vězda) Arup
(loc. 5), Graphium aphthosae Alstrup & D.
Hawksw. (loc. 14), Lichenostigma chlarote-
rae (F. Berger & Brackel) Ertz & Diederich
(loc. 4) and Stigmidium xanthoparmeliarum
Hafellner (loc. 4).
Acarospora nitrophila H. Magn.
Loc. 5, on siliceous rock, Ertz 17309 (BR), Died-
erich 17208 (h) & Van den Broeck 5496 (BR) (det.
C. Roux).
In the area of the checklist of Belgium, Lux-
embourg and northern France, Acarospora
nitrophila is a very rare species, previously
known from two localities in northern Bel-
gium and one in northern France (Dieder-
ich et al. 2013). New to Luxembourg.
Buellia ocellata (Flot.) Körb.
Loc. 4, on siliceous rock, Ertz 17283 (BR) & Died-
erich 17247 (h).
Buellia ocellata is widespread, but rare in the
checklist area (Diederich et al. 2013), pos-
sibly overlooked owing to a confusion with
B. aethalea, from which it diers by a more
yellow-green colour of the thallus, reacting
C + orange. New to Luxembourg.
Caloplaca cerinelloides (Erichsen) Poelt
Loc. 12, on Populus tremula, Van den Broeck 5541
(BR); loc. 13, on Salix caprea, Diederich 17476
(h); loc. 14, on Fraxinus, Diederich 17402 (h).
A very rare species, previously known from
one Belgian locality in the Ardenne district.
In northern France, the species is known
from two localities, one in the Maritime and
one in the Lorraine district. It is new to Lux-
embourg.
Caloplaca conversa (Kremp.) Jatta var.
fallax (Bagl.) Wunder
Loc. 5, on siliceous rock, Ertz 17307 (BR), Diederich
17204 (h) & Van den Broeck 5302 (BR) (det. C. Roux).
Caloplaca conversa is widespread in central
and southern Europe, oen at a higher alti-
tude. e Luxembourg specimen belongs
to var. fallax, diering by larger asci and
ascospores, a taxon not distinguished by
some authors. is variety was known only
from northern Italy (Wunder 1974) and has
also been recorded in a locality in southern
France (Roux, pers. comm.). e species is
new to our checklist area.
Caloplaca ferruginea (Huds.) . Fr.
Loc. 11, on Salix caprea, Diederich 17390 (h) &
Van den Broeck 5520 (BR).
In the 19th century, this species was wide-
spread but rare in the area of the check-
list, where it occurred on Fagus, Fraxinus
and Sorbus in forests and on roadside trees
Fig. 1. Caloplaca conversa
var. fallax, on siliceous
rocks near the castle of
Bourscheid. Photo 5.5
mm wide.

Bull. Soc. Nat. luxemb. 114 (2013) 75
Fig. 2. Tremella caloplacae, a
lichenicolous basidiomycete
parasitizing the apothecia
of Xanthoria parietina, near
Belvaux. Photo 7.4 mm
wide.
(Diederich et al. 2013). During the 20th cen-
tury it has been collected in two localities
in the Belgian Meuse district in 1962, and
is was considered as extinct in the entire
checklist area aerwards. In Luxembourg,
the last known record was from 1890, and
therefore we were particularly surprised to
nd a healthy thallus during the excursion.
Collema polycarpon Hom.
Loc. 5, on mortar of walls made of siliceous
stones, Diederich 17200 (h).
As this species usually grows on calcareous
natural outcrops, the discovery on siliceous
walls, mainly on mortar, was a surprise. New
to Luxembourg and to the Ardenne district.
Lecanora barkmaniana Aptroot & Van Herk
Loc. 11, on Salix caprea, Diederich 17382 (h).
N. Stapper kindly informed us that he
observed this species, together with L. com-
pallens van Herk & Aptroot and L. expal-
lens Ach. as an epiphyte near Tëntesmillen
(Heinerscheid, Ard. distr.) in 2002. New to
Luxembourg.
Scoliciosporum sarothamni (Vain.) Vězda
Loc. 4, on Sarothamnus, Diederich 17242 (h).
In the area of the checklist Scoliciosporum
sarothamni is known only from a few locali-
ties in the Ardenne district in Belgium and is
here reported as new to Luxembourg.
Telogalla olivieri (Vouaux) Nik. Hom. &
Hafellner
Loc. 12, on Xanthoria parietina, Diederich 17453
(h); loc. 13, on X. parietina, Ertz 17613 (BR),
Diederich 17474 (h) & Van den Broeck 5526 (BR);
loc. 14, on X. parietina, Diederich 17437 (h).
is lichenicolous species was found in
abundance on Xanthoria parietina, mainly
on Salix caprea, in three localities. It was
only once collected in Luxemburg before
1850 by F.-A. Tinant (Sérusiaux et al. 1999)
and recently reported from Belgium for the
rst time (Diederich et al. 2009). Recent eld
trips in Belgium suggest that the species is
nowadays abundant and widespread in the
Meuse district, but seems to be absent in the
northern part of the country. It might be in
extension since its host lichen X. parietina
became extremely abundant everywhere
because of a general eutrophication.
elocarpon intermediellum Nyl.
Loc. 1, on dead wood, Diederich 17228 (h).
A very rare species in the area of the check-
list, previously just known from Luxem-
bourg (one locality in the Ard. and two in
the Lorr. district).
Tremella caloplacae (Zahlbr.) Diederich
Loc. 11, on Xanthoria parietina, Diederich 17385
(h); loc 12, on X. parietina, Ertz 17607 (BR) & Died-
erich 17455 (h); loc. 13, on X. parietina, Ertz 17612
(BR), Diederich 17473 (h) & Van den Broeck 5523
(BR), loc, 14, on X. parietina, eld observation.

76 Bull. Soc. Nat. luxemb. 114 (2013)
is lichenicolous basidiomycete was for-
merly known mainly on Caloplaca species,
but appears to become more and more abun-
dant on Xanthoria parietina, mainly parasitiz-
ing the apothecia. It is new to Luxembourg.
Zwackhiomyces peltigerae Miądl. & Alstrup
Loc. 14, on Peltigera rufescens, Diederich 17425 (h).
is lichenicolous ascomycete, apparently
conned to Peltigera species, was described
from Poland (Miadlkowska & Alstrup 1995)
and has subsequently been reported from
Austria (Hafellner 1999) and Germany
(Brackel 2009). New to our checklist area.
Acknowledgments
We thank Claude Roux for identifying our speci-
mens of Acarospora nitrophila and Caloplaca
conversa and Norbert Stapper for informing us
about a further Luxembourg locality of Lecanora
barkmaniana.
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