A Synopsis of the Genera Skyttea, Llimoniella and - Lichens of ...

440 THE LICHENOLOGIST Vol. 32
confined to Lecanora species, which are distinguished by the reddish brown
ascomata and excipular pigments.
Additional specimens examined. Finland: Inari-Lappland, Umgebung von Kevo, auf Lecanora
sp., 196x (full date missing), Poelt (GZU) .—Great Britain: Scotland: V.C. 92, South Aberdeen:
9 km ENE of Ballater, Dinnet Oakwood NNR, on L. chlarotera, 1994, Coppins 16565 (E). V.C.
98, Main Argyll: Tyndrum, Glenorchy, near Invergaunan, 105 m, on L. pulicaris, vi 1978, Coppins
(E). V.C. 104, North Ebudes, Isle of Skye: SW Broadford, Coille Gaireallach, 1987, on L.
chlarotera, Diedench 8148 (h) & Coppins 11695 (E); Drinan, v 1987, on L. chlarotera, Diedench
8212 (h). V.C. 105, West Ross: Torridon, Inveralligan, wood and gorge of Abhainn Alligin, on
L. chlarotera, 1994, Coppins 16403 (E).—Spain: Navarra: Leiza, on L. chlarotera, 1987, Etayo
3801 (h); Zugarramurdi, Alkurruntz, on L. gr. argentata, 1988, Etayo 5201 (h).—Canary
Islands: La Palma: Subida a La Cumbre desde Brena Baja, fayal-brezal, sobre L. chlarotera en
Laurus, 760 m, 1995, Etayo 13501 (h).—Russia: Baikal Lake region, Baikal'skii Reserve, right
bank of Kliuchevaia River before the Populus islands, on L. attophana, viii 1996, Urbanavichyus
(LE).—Canada: Quebec, Gaspesie, Pare National Forillon, 5 km ENE of Gaspe, 'Penouille'
peninsula, on L. pulicaris, 1997, Rambold 6124 (M).—USA: Florida: Marion Co., Ocala National
Forest, NE of Mill Dam Lake, hardwood scrub, on sterile crust, 1987, Harris 21072 (NY).
Washington: Clallam Co., Olympic Nat. Park, Lake Ozette, Tivoli Island, on L. farinaria, 1997,
Tensberg 24861, 24876 (BG L-35318, 35324).—Argentina: Buenos Aires, Mar de Plata, Punto
Magotes, 1995, Marbach & Dorsch (hb. Kalb 32934).—Uruguay: Canelones, Parque Nacional
de F. D. Roosevelt, on Leanora, 1995, Marbach & Osbrio (hb. Kalb 32913).
Skyttea mayrhoferi Diederich & Etayo sp. nov.
Skyttea insignis ascomatibus 150-225(-500) \xm diam., margine 70-105(-150) nm crasso, poro
10-30 (im diam., excipulo viridibrunneo, K+ olivaceo, basaliter pro parte brunneo, K+ violaceo,
pilis 15-30 \im longis, ascis 35-55 x 4-5-6-5 ^m, ascosporis 6-12 x 3-4 \im.
Typus: New Zealand, Auckland, Kawakawa Bay E of Auckland, Papanui Point, 36°56'S,
175°13'E, 0-20 m, coastal rock, on Pertusaria melanospora, 8 January 1985, Mayrhofer 5883 &
Samuels (GZU—holotypus); ibid., Mayrhofer 5884 & Samuels (GZU, hb. Diederich—topotypi);
ibid., 12 January 1985, Mayrhofer 5828, Hertel 29148, 29155 & Samuels (GZU, M—topotypi).
(Figs 2C, 3B, 4)
Ascomata initially immersed, later erumpent, rarely gall-forming, dispersed
or aggregated, black, ± roundish, sometimes elongate, 150-225(-300) jam
diam., up to 500 urn long if elongate; margin in opened ascomata 70-105 um
thick ( x 80), in the largest ascomata even 100-150 urn, striate, sometimes
with several deep fissures and appearing cruciate; pore 10-30 um. Exciple
laterally greenish to olivaceous, K+ olivaceous brown, 20-45 um thick,
basally greenish brown, with a reddish brown, K+ purple or violet pigment,
25-45 um thick; excipular hairs olivaceous, straight, wall apically not thickened
and therefore not refractive, 15-30 x 3-4 jim. Subhymenium hyaline,
10-20 um thick. Hymenium 35-60 um thick. Epihymenium hyaline to pale
olivaceous. Paraphyses filiform, simple, 1-5-2-5 um thick. Asci subcylindrical,
wall apically thicker, (6-)8-spored, 35-55 x 4-5-6-5 um; ascogenous
hyphae with croziers. Ascospores hyaline, ellipsoid, non-septate, biguttulate,
(5-)6-12 x 3_4(_4-5) urri; exceptionally 1-septate.
Hosts. Pertusaria cf. coccodes (from Kenya: sterile, isidiate, K+ red), P.
heterochroa, P. melanospora and other Pertusaria species (thallus). In some
specimens, the fungus has induced the formation of galls.