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  • Chemotaxonomy  (1)
  • Graphidales  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Chemical variation in two species of theLecanora subfusca group (Lecanoraceae, lichenizedAscomycotina) (1994)
    Springer
    Plant systematics and evolution 191 (1994), S. 227-236 
    Details
    ISSN: 1615-6110
    Keywords: Lichenized fungi ; Lecanoraceae ; Lecanora epibryon ; L. subimmersa ; Chemotaxonomy ; biogeography ; taxonomy ; xanthones
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The chemical variation inLecanora epibryon andL. subimmersa, two species of theL. subfusca group, has been examined. In both species the chemical differences are correlated with geographical distribution, but not with morphological differences. As a consequence the chemotypes are recognized at subspecific level. InL. epibryon three chemical races are segregated according to the various chemosyndromes present. Subspeciesepibryon, containing atranorin and triterpenoids, occurs in the northern hemisphere and South America, while the other two subspecies occur only in the southern hemisphere. The subsp.broccha (Nyl.)Lumbsch, comb. nova, contains atranorin, the stictic acid and the 2,5,7-trichloro-3-O-methylnorlichexanthone chemosyndromes, while subsp.xanthophora Lumbsch, subsp. nova, is similar but lacks the stictic acid chemosyndrome. Two chemical races occur in the pantropical speciesL. subimmersa. While subsp.subimmersa contains atranorin and zeorin, subsp.ramboldii Lumbsch & Elix, subsp. nova, contains an additional ten chlorinated xanthones.L. impressa is reduced to synonymy toL. subimmersa.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00984667
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  • 2
    Electronic Resource
    Electronic Resource
    Ascospore septation inDiploschistes (Thelotremataceae, lichenizedAscomycota) and the taxonomic significance of macro- and microcephalic ascospore types (1997)
    Springer
    Plant systematics and evolution 205 (1997), S. 179-184 
    Details
    ISSN: 1615-6110
    Keywords: Ascomycota ; Graphidales ; Ostropales ; Diploschistes ; lichenized ascomycetes ; Ascospore septation ; systematics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The ascospore septation in 13 species ofDiploschistes was examined. Microcephalic, macrocephalic, as well as irregular ascospore septation were found. In some species and even specimens of some species, different types of spore septation were detected. The taxonomic significance of the character of ascospore septation sequence is questioned, and the distinction of the ordersGraphidales andOstropales, which was primarily based on this character, is rejected.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01464403
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