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The Lichens and Lichenicolous Fungi of Belgium and Luxembourg ...

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122 P. DIEDERICH & E. SÉRUSIAUX<br />

pulverea (Borrer) Hafellner & Schreiner<br />

Syn.: Catillaria pulverea (Borrer) Lettau<br />

Corticolous, mainly on Quercus, in well-preserved<br />

forests.<br />

B Ard.: RR, Lorr.: RRR. L - .<br />

Lit.: L3: 28.<br />

laureri (Th. Fr.) Hafellner, syn. Catinaria laureri (Th. Fr.)<br />

Degel. <strong>The</strong> only record <strong>of</strong> this species from the study<br />

area (John 1990a: 111, 1990b: 60) is a mistake for<br />

Lecidella laureri.<br />

MEGASPORA (Clauzade & Cl. Roux) Hafellner<br />

& V. Wirth<br />

verrucosa (Ach.) Hafellner & V. Wirth<br />

Syn.: Pachyospora verrucosa (Ach.) A. Massal.,<br />

Lecanora mutabilis (Ach.) Nyl.<br />

Over mosses in Mesobromion communities.<br />

B Mosan: RR (known only from the western parts<br />

<strong>of</strong> the district). L - . D Ard.: RRR.<br />

Lit.: L1: 7.<br />

MELANELIA Essl.<br />

disjuncta (Erichsen) Essl.<br />

Syn.: Parmelia disjuncta Erichsen, P. sorediata<br />

auct., non (Ach.) Th. Fr.<br />

On siliceous <strong>and</strong> s<strong>and</strong>stone rocks in natural, open<br />

habitats.<br />

B Ard.: AR. L Ard.: RR, Lorr.: RRR.<br />

Lit.: La66: 431 (sub P. substygia), Mü1: 154, NL92: 159,<br />

Sé: 138.<br />

elegantula (Zahlbr.) Essl.<br />

Syn.: Parmelia elegantula (Zahlbr.) Szatala<br />

Corticolous, mainly on roadside trees (most common<br />

on Fraxinus), also in orchards (Malus),<br />

always in rather nitrophilous conditions.<br />

B Fl.: R, Camp.: RRR, Brab.: R, Mosan: AR, Ard.:<br />

AR, Lorr.: RRR. L Ard.: AR, Lorr.: AR.<br />

Lit.: Ho: 176, 598, La66: 428, WS: 38, 76.<br />

exasperata (De Not.) Essl.<br />

Syn.: Parmelia exasperata De Not., P. aspera A.<br />

Massal., P. aspidota (Ach.) Poetsch<br />

Corticolous, mainly on the rather acid bark <strong>of</strong><br />

branches <strong>and</strong> twigs <strong>of</strong> Fraxinus, Juglans, Populus,<br />

Pyrus, Quercus <strong>and</strong> Salix, in open habitats<br />

(meadows, orchards, etc.), incl. roadside trees,<br />

rarely found on trunks <strong>of</strong> roadside trees<br />

(Fraxinus, Juglans <strong>and</strong> Tilia).<br />

B Brab.: RRR (†

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