Fróðskaparrit - 01.01.1992, Blaðsíða 81

THE LICHENS OF THE FAROES
85
thick in convex apothecia, dark brown, giv-
ing a slight reddish solution in K.
Paraphyses free, sparsely branched, anasto-
moses not seen, ca. 1 pm thick, slightly
enlarged at top to 2 pm, without a dark cap.
Asci clavate to broadly clavate, of lecano-
ra-type, 35-45 x 13-16 (im, 8-spored.
Ascospores non-septate, almost cylindric-
al, with rounded ends, hyaline, 11-13 x
3.5-4 pm.
Holotype: Faroe Islands, Eysturoy,
Gjógv, stone-wall at the grave-yard, on
Lecanora intricata, 3 Sept. 1956, Degelius
(herb. Degelius).
The new species is clearly parasitic, the
host thallus and eventually the apothecia
become decolorized and finally totally
destroyed. It is known only from the holo-
type. The species is placed in Carbonea
because of the lecanoralean asci, the little-
branched paraphyses and the dark hypothe-
cium. Lecidella also has lecanoralean asci
and little-branched paraphyses, but these
are distinctly swollen and mostly dark at
the top, and the hypothecium is pale.
Geltingia has free paraphyses but the asci
are narrowly ellipsoid or cylindrical and the
hypothecium pale. Nesolechia oxysporiza
is known from the closely related host
Lecanora polytropa, but that species has
aggluti-nated paraphyses and pale hypothe-
cium. Three other lichenicolous species of
Carbonea are known: C. vitellinaria (see
below) and C. supersparsa (Nyl.) Hertel
are smaller, with paler hypothecium and
broader ascospores, while C. halacsyi
(Steiner) Hafellner & Sancho on yellow
Rhizocarpon species has dark hypothecium
and bigger, ellipsoid ascospores.
*C. vitellinaria (Nyl.) Hertel. Licheni-
colous fungus, on Candelariella vitelli-
na. Víkarbyrgi, VA 851464; Gjógv, GD.
Catapyrenium cinereum (Pers.) Kórber.
On soil. í Botni, VA 85696; Akrar, VA
85481. Eiði, GD. Gjógv, GD; SS 6323-2.
(41; 1: Verrucaria tephroides; 2: En-
docarpon cinereum p.p.; 1,2: Dermato-
carpon rufescens p.p.).
C. daedaleum (Krempelh.) B. Stein. On
soil. Maritime grassland, Koltur, VA
85387; Svínoy, VA 85604; Raktangi, VA
85826; river bed N of Leynavatn, VA
85325; Somfelli, VA 851433; W of
Leynavatn, VA 85336. (41; 2: Endo-
carpon cinereum p.p.).
C. lachneum (Ach.) R. Sant. Common on
soil on sunny rocks. (7; 5: Dermato-
carpon 1.; 1,2: D. rufescens p.p.; D.
hepaticum).
Catillaria chalybeia (Borrer) Massal.
Common on rocks, mostly at the coast, 6
coll. (5; 1: Lecanora erysibe * alboriel-
la; 2: Lecidea sylvicola).
*C. contristans (Nyl.) Zahlbr. Mountain
NE of Leynavatn, S-facing, VA 85316.
Slættaratindur, SW-slope, 400 m, SS
6279-2.
C. lenticularis (Ach.) Th. Lr. Ryskivatn,
VA 85472. (2: Bilimbia /.).
*Catolechia wahlenbergii (Ach.) Kðrber.
On vertical rock. Mountain NE of
Leynavatn, c. 600 m, VA 85761 (a small
specimen).
Cercidospora arthroraphidicola Alstrup
sp. nov.
Pyrenomyces lichenicola. Ascomata ad
circiter 100 pm diam., in thallum hospitis