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Poelt, Josef, Ulrik Søchting & Eric Steen Hansen
Die Flechtengattung Caloplaca in Grönland

1987, 52 s., hft.
Illustreret
19 x 26,5 cm
ISBN 978-87-635-1188-9
Serie: Monographs on Greenland | Meddelelser om Grønland, vol. 258
ISSN 0025-6676
Serie: Bioscience, vol. 25
ISSN 0106-1054



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The lichen genus Caloplaca is revised on the basis of specimens collected by J. Poelt and H. Ullrich in 1982 and 1983 in West Greenland, as well as all Greenland material in the herbaria of Copenhagen (C ) and Oslo (O). A total of 43 species and two species of unclear affinity is described and discussed. Details are given about their ecology and the distribution of nine species is mapped. The taxonomy of some species-aggregates, including Caloplaca pyracea coll. and several black fruited saxicolous forms, is considered still unclear. A diagnostic key to all taxa is presented.

One species and three varieties are described as new: Calaplaca psoricida, C. citrina var. soropelta, C. jemtlandica var. cerinosora, C. lithophila var. elaeophora (with oil paraphyses). Some previously differentiated species growing on different substrates are united: Caloplaca stillicidiorum with C. cerina, and C. cinnamomea with C. ammiospila. Variation in morphology and colour is discussed with special emphasis on the impact of the arctic environment. In several species, e.g. Caloplaca exsecuta and C. tiroliensis, a significant blackenning of the apothecium due to anatomical and chemical changes is described.

An attempt has been made to classify the Greenland and some European species in natural infrageneric groups. It is concluded, however, that a clear cut natural subdivision of this large genus is not possible at present.

Notable new finds from Greenland are: Caloplaca trachyphylla, which is previously reported from western North America and Central Asia, C. anchon-phoeniceon, C. cacuminum, C. insularis, and C. saxifragarum, which are known from the Alps, and the temperate species C. decipiens, C. lactea and C. saxicola. Six species of Caloplaca are recorded as parasitic on lichens: Caloplaca anchon-phoeniceon (on Aspicilia), C. cacuminum (juvenile specimens on crustose lichens), C. castellana (mainly on Placynthium and other cyanophili), C. insularis (on Aspicilia), C. magni-filii (on Lecidea nigroleprosa) and C. psoricida (on Psora rubiformis).


 
Emneområde | Arktiske studier |
Emneord | Botanik |
Specifikt emneord | Laver | Lichener |
Verdensdel m.v. | Grønland |
Sprog | Tysk |

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Eric Steen Hansen som forfatter

The lichen genus Physcia and allied genera in Greenland
1986, ISBN 978-87-635-1182-7, hft
The lichen genus Physcia and allied genera in Greenland
1986, ISBN 978-87-635-1182-7, hft
Lichens from Central East Greenland
1982, ISBN 978-87-635-1151-3, hft
Lichens from Central East Greenland
1982, ISBN 978-87-635-1151-3, hft
 


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The lichen genus Physcia and allied genera in Greenland     Moberg, Roland & Eric Steen Hansen
The lichen genus Physcia and allied genera in Greenland
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The lichenicolous fungi of Greenland     Alstrup, Vagn & David L. Hawksworth
The lichenicolous fungi of Greenland
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Lichens from Central East Greenland     Hansen, Eric Steen
Lichens from Central East Greenland
1982

Vegetation of the Angmagssalik district, Southeast Greenland, IV. Shrub, dwarf shrub and terricolous lichens     Daniëls, Fred J. A.
Vegetation of the Angmagssalik district, Southeast Greenland, IV. Shrub, dwarf shrub and terricolous lichens
1982





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