Classification

The Ascus Apex in Lichenized Fungi IV. Baeomyces and Icmadophila in Comparison with Cladonia (Lecanorales) and the Non-Lichenized Leotia (Helotiales)

“…It is highly probable that the Baeomycetaceae are not the only lichenized members of the Helotiales. The similarities in ascus structure, function and staining properties in the Baeomycetaceae and the Trapeliaceae, ' a family with no clear relationships' (Poelt 1974), and in some members of the Lecideaceae and Lecanoraceae were described by Hertel (1970) and Honegger (1982c). These groups deserve further investigation.…”

“…Or, as stated by Santesson (1954), 'in no other group of plants is the taxonomic work carried out more carelessly than in lichenology'. Within the last 20 years many groups of lichenized fungi have been revised on the basis of ascocarp ontogeny and/or ascus structure and function, and many interesting and noteworthy attempts have been made towards a natural classification of the lichen-forming groups and their inclusion with all known ascomycetes (Luttrell 1951, Henssen & Jahns 1973, Poelt 1974, Barr 1976. Despite all this progress, various fundamental problems in classification remain, and the taxonomic position of many different groups remains unclear (Hawksworth 1978).…”

“…In recent taxonomic treatments a close relationship between the Baeomycetaceae and the Cladoniaceae has been supposed. Baeomyces and Icmadophila were either included as genera within the Cladoniaceae (Ozenda & Clauzade 1970), or the Baeomycetaceae were classified close to the Cladoniaceae (Poelt 1974, Henssen & Jahns 1973, Barr 1976. Morphological similarities in vegetative and generative structures may be observed in both groups.…”

Siphula elixii, a new lichen from Tasmania and New Zealand

“…Apothecia are unknown in the genus and consequently its precise taxonomic affinities are uncertain. Together with the genera Endocena and Thamnolia, which are also obligately sterile, Siphula forms a natural group, which Poelt (1973) suggests is best placed in a separate family, allied to the Cladoniaceae on the basis of the chemistry of the species. The provisional name "Siphulaceae" has been used subsequently by several authors, for example, Dodge (1973) and Poelt & Vrzda (1981), although Rogers & Hafellner (1992) retain the genus in the Deuteromycotina.…”

A Revision of European Saxicolous Species of the Genus Buellia de not. and Formerly Included Genera

“…Following his circumscription, Buellia was characterized by having spores without any internal wall thickening and possessing lecideine or cryptolecanorine apothecia. Poelt (1973), Henssen & Jahns (1973) and Hafellner et al (1979) included the family Buelliaceae in the Physciaceae, thus indicating the close affinities between crustose, foliose and fruticose genera therein (Mayrhofer 1982). Miiller & von Arx (1962) designated B. disciformis as the type species of the genus, which was later accepted and further discussed by Hafellner (1979).…”