Katalog - Lichenological literature

2218

Søchting U. (1997): Two major anthraquinone chemosyndromes in Teloschistaceae, Bibl. Lichenol., 68: 135-144

Secondary metabolites, mainly anthraquinones, from the liehen genera Teloschistes, Xanthoria and Caloplaca were analyzed with HPLC and for each compound the percentage area of the total peak area was calculated. Two chemosyndromes, each including the same anthraquinones, but in different proportions are described. Syndrome A, representing almost half of all analysed species, has parietin as the dominant compound and very small proportions of teloschistin, fallacinal, emodin and parietinic acid. It … Read more...

2217

Søchting U. & Olech M. (2000): Caloplaca scolecomarginata spec. nova and C. frigida spec. nova, two new lichen species from Antarctica, Bibl. Lichenol., 75: 19-26

Two Caloplaca species from Antarctica are described as new to science. C. scolecomarginata from King George Island, South Shetland Islands is characterized by a thallus composed of vertical, anastomosing lobes, a true excipulum consisting of intricately interwoven hyphae, simple spores with a central wall thickening, one-ehambered spermogonia and chlorinated anthraquinones. C. frigida from the extremely arid and frigid environment of Dronning Maud Land on the antarctic continent belongs to the holocarpa … Read more...

2216

Messuti M. I. & Lumbsch H. T. (2000): A revision of the genus Ochrolechia in southern South America, Bibl. Lichenol., 75: 33-46

The species belonging to Ochrolechia occurring in southern South America are revised. 8 taxa are accepted. Descriptions of the species and a key to the taxa are included. O. blandior is reduced to synonymy with O. pallescens, O. antarctica and O. ocelliformis with O. parella and O. pseudotartarea with O. szatalaensis. O. androgyna is a new record for South America and O. frigida is new to Chile Read more...

2215

Kärnefelt EI. & Thell A. (2000): On the systematic position of the genus Cetrariella (Parmeliaceae: Ascomycotina) indicated by ITS rDNA data, Bibl. Lichenol., 75: 27-32

A preliminary systematic position of the genus Cetrariella based on sequences from the ITS region is discussed. Cetrariella delisei and C. fastigiata appear as not very closely related species. Both species form a monophyletic sister group to Cetraria and should presumably stay as a separate segregate. The evidences from morphological data and data from secondary chemistry, however, strongly support the separation of the genus Cetrariella. We still need much more molecular data from the examined … Read more...

2214

Follmann G. & Werner B. (2000): New saxicolous Roccella species from Galápagos and reflections on the evoluton of the Roccellaceae (Arthoniales) on the "Enchanted Islands", Bibl. Lichenol., 75: 1-18

Four new saxicolous Roccella species (Roccellaceae, Arthoniales) are described from the Pacific Galápagos Islands: R, geniculata FOLLM. & B. WERNER, R. glebaria B. WERNER & FOLLM., R. kappenicina FOLLM. & B. WERNER, R. stipitata B. WERNER & FOLLM. This raises the number of confirmed Galapagoan Roccella taxa to nine, eight thereof being lavicolous neoendemics of more or less maritime habitats. Provided with various chemical and morphological characters unknown from the genus and (or) family so far, … Read more...

2213

Feige G. B., Guderley R. & Lumbsch H.T. (2000): Lecanora glaucodea Nyl. and L. subcrenulata Müll. Arg., two neotropical lichens with a remarkable chemistry, Bibl. Lichenol., 75: 99-104

2212

Obermayer W. (1997): Studies on Lethariella with special emphasis on the chemistry of the subgenus Chlorea, Bibl. Lichenol., 68: 45-66

All species of the genus Lethariella (e.g. L. canariensis, L. cashmeriana, L. cladonioides, L. flexuosa, L. intricata, L. mieheana, L. sernanderi, L. smithii, L. togashii, L. zahlbruckneri) have been subjected to TLC-analyses. Lethariella mieheana, a pendulous taxon with psoromic acid in the medulla, is described as new. Lethariella smithii (Basionym: Usnea smithii) is proposed as a new combination. A key to the taxa, mainly based on differences in chemistry and growth-form, is provided. New information … Read more...

2211

Mies B. & Printzen C. (1997): Notes on the lichens of Socotra (Yemen, Indian Ocean), Bibl. Lichenol., 68: 223-239

A first account is given on the lichen flora and ecological aspects of Socotra, an island situated off the Somalian coast. Lichen habitats are described with respect to their geology, the substrates, and the meso- and microclimatic conditions. The lichen flora of Socotra is quite unique, and contains a wealth of relictual and endemic species. This in turn is of considerable biogeographical interest. The Socotran archipelago dates back to the late Cretaceous, and the relationship of the present lichen … Read more...

2210

Kondratyuk S. & Kärnefelt I. (1997): Josefpoeltia and Xanthomendoza, two new genera in the Teloschistaceae (lichenized Ascomycotina), Bibl. Lichenol., 68: 19-44

Two new genera in the Teloschistaceae, Josefpoeltia, and Xanthomendoza are described on the unique morphological characters. The genus Josefpoeltia is characterized by distinctly foliose, dorsiventral, thallus with a unique structure of both cortical layer and thalline margin of the apothecia, designated as a pseudoprosoplectenchymatous tissue, by the narrowly fusiform long conidia, and by the presence of a network of dense thin rhizines which are atypical for xanthorioid lichens. Two species are … Read more...

2209

Knoph J.-G. & Leuckert C. (1997): Chemotypes and distribution patterns of the non-saxicolous species of Lecidella (Lecanoraceae, Lecanorales), Bibliotheca Lichenologica, 68: 129-134

The chemistry and geographical distribution of the non-saxicolous species of Lecidella are reviewed. The genus is characterised chemically by the abundant occurrence of chlorinated xanthones. The chemotypes of the taxa are listed. Although most species occur in both hemispheres, several species are restricted to either the Northern or Southern Hemisphere. The centre of diversity of non-saxicolous species of Lecidella is in the Northern Hemisphere. Five new combinations are proposed: Lecidella … Read more...