GRAPHIS ScnIPTA - Universitetet i Oslo

4 Michail P. Zhurbenko
Thamnolia subultformis: T, Md, Dr,
Mr, St, SR, R 7 15
T. vermicularis: T, Md, Dr, Mr, St, SR, R7 13
Umbilicaia arctica: SR 1 1
U. qlindrica: SS, SR, R 3 6
U. decussata: SR, R 2 4
U. deusra: SS, SR 2 3
U. hyperborea: SR, R 2 4
Discussion
The following species are new to Taimyr:
Dactylina beringica, Melanelia substygia,
Parmeliella tiptophylla f. onegensis, Phaeocalicium
praecedens, Physcia aipolia v.
alnophila, Physconia detersa, Stereocaulon
capitellatum and Umbilicaria tyngei. Three
species, which were previously known from
single findings were confirmed: Asahinea
scholanderi (known from Tareia), Corbcum
viride and Phaeophyscia kairamor (both
species were known from Kresty Taimyrskie).
The occurrence of Asahinea scholanderi, and
Dactylina beringica at western Taimyr is of
interest taking into account the amphiberingian
pattern of distribution of these
species. The most "active" (thriving) lichen
species sensu B. A. Yurtsev (Yurtsev et al.
1978) are those which thrive in the highest
number of habitats in the landscape and play
the most important role in the plant cover.
These are Cetraia islandica, Stereocaulon
alpinum, Cladonia ecmoqna, C. sticta,
Ochrolechia figida, Cladonia plaidata,
Psoroma hypnotuffi, Lobaia linita, Nephroma
etcpalliduffi , Peltigera rufescens, Cladonia cocctfera,
Cetraria cucullata, Peltigera didactyla,
Thamnolia subuliformis and Dactylina arctica.
Acknowledgements
Thanks are due to the following persons help
with determinations: R. Moberg (Physciaceae),
E. S. Hansen (Coriscum viride), G. B.
Feige (Umbilicaria spp.), P. M. Jorgensen
(Parmeliella triptophylla) and A. N- Titov
GRAPHIS SCRIPTA 4 (Leez)
U. Iyngei: SR
U. proboscidea: Dw, SR, R
U. torrefacta: St, SR
Usnea sp.: Dw
Xanthoia candelaia: Dw, SR, R
X. elegans: St, SW, SS, SR, R
X. sorediata: St
(Phaeocalicium praecedens). I am indebted to
N. Matveeva and L. Zanoha for the opportunity
to take part in their expedition to
Taimyr in 1990. The English was revised by U.
Sochting.
References
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34
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