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Muellerella erratica (A. MASSAL.) HAFELLNER & V. JOHN
1a: on Caloplaca erythrocarpa (hb IVL 3957); 2: on Lecanora rupicola (hb IVL 3959);
3: on Tephromela atra (hb IVL 3975); 5: on Aspicilia contorta (hb IVL 3981); 12: on
Caloplaca erythrocarpa (hb IVL 3945); 20: on Lecanora polytropa (hb IVL 3955).

This is the most common member of the genus with a worldwide distri-
bution on a wide range of host lichens. In Italy it was known from Lombardia,
Trento-Alto Adige, Friuli-Venezia Giulia, Liguria (ANZI 1860, TRIEBEL 1989) and
Sardinia (NIMIS & POELT 1987) as well as from the island of Marettimo (NIMIS et
al. 1994) (most records under the name Muellerella pygmaea var. athallina (MÜLL.
ARG.) TRIEBEL).

Muellerella pygmaea (KÖRB.) D. HAWKSW. s.str.
3: on Lecidea obluridata (hb IVL 3963); 16b: on Aspicilia calcarea agg. (hb IVL 3842);
20: on Lecidea grisella; 20: on Acarospora smaragdula (hb IVL 3953).

A worldwide distributed species with a wide range of host lichens, most
common on saxicolous, mainly crustose lichens in higher altitudes of the north-
ern hemisphere (HAFELLNER & MAYERHOFER 2007). In Italy it is known from
Lombardia, Trento-Alto Adige (ANZI 1860, TRIEBEL 1989), Friuli-Venezia Giulia
(TRETIACH & HAFELLNER 2000), Sardinia (NIMIS & POELT 1987); in Sicily it has
been reported near Cefalù and Milo (VAN DEN BOOM 1992) and on the island of
Marettimo (NIMIS et al. 1994).

Muellerella ventosicola (MUDD) D. HAWKSW.
3: on Rhizocarpon geographicum (hb IVL 3965).

Rarer than the two other species of the Muellerella pygmaea complex, this
species shows a preference for hosts of the genus Rhizocarpon, without being
resticted to them. In Italy it was known from Trento-Alto Adige (TRIEBEL 1989).

Nectriopsis parmeliae (BERK. & M.A. CURTIS) M.S. COLE & D. HAWKSW.
18: on Parmelia saxatilis (hb IVL 4234).

A very rare species, previously known from the British Isles, Germany,
USA, and Brazil. New for Sicily, probably also for Italy.

Phacopsis fusca (TRIEBEL & RAMBOLD) DIEDERICH
3: on Xanthoparmelia conspersa (hb IVL 3976).

Phacopsis fusca shows a worldwide distribution and is growing on mem-
bers of the Parmeliaceae (mostly on Xanthoparmelia). In Italy it was known from
Trentino-Alto Adige and from Sardinia (TRIEBEL et al. 1995). New for Sicily.

Phoma ficuzzae BRACKEL sp. nov.
Pycnidia lichenicola, immersa, subglobosa, 105–135 µm in diametro. Cel-

lulae conidiogenae breviter ampulliformes vel subglobosae, (5·7–)6·0–7·6(–8·0) x

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