74 research outputs found
The strange case of <em>Ocellomma rediuntum</em> (Arthoniales: Roccellaceae) in Australia: a remarkably disjunct lichen
No full textThe new combination Ocellomma rediuntum (Stizenb. ex Hasse) Kantvilas, Gueidan & Tehler is proposed, supported by morphological, anatomical and molecular data. Hitherto known only from the Californian coast, this species is here recorded for Kangaroo Island (South Australia), Victoria and Tasmania. It is described and illustrated from Australian collections. The ecology of the species and its remarkable distribution are discussed.</p
Trimmatostroma rouxii Diederich, Tehler & van den Boom sp. nov. - In: Diederich, Paul (2021) Notes on lichenicolous taxa of the asexual fungal genera Intralichen and Trimmatostroma, with a revised key and descriptions of four new species
No full textThe genus Intralichen comprises several mainly intrahymenial lichenicolous species of unknown phylogenetic affini- ties, each reported from a very large host-spectrum, with many reports obviously representing wrong identifications. We suggest restricting the use of each of these species names to collections growing on the same host genus as the type specimen, i.e., all other reports from different hosts are considered uncertain. Intralichen christiansenii is considered as a synonym of I. lichenicola, a species confined to Candelariella species. Intralichen lichenum s. str. is a poorly known and rarely collected species from Arthoniales hosts, while similar populations on Strangospora are treated as I. aff. lichenum. Intralichen baccisporus has not been revised, as sufficient material from the many Teloschistaceae gen- era was not available. Morphologically similar species growing on the thalli, not in the hymenium, of various lichen hosts are included in the genus Trimmatostroma, although most lichenicolous species do not seem to be related to the generic type. The new species Trimmatostroma acetabuli (on Pleurosticta acetabulum), T. denigrans (on Lecanora horiza), T. rouxii (on Opegrapha durieui and other saxicolous Arthoniales) and T. vandenboomii (on Myriolecis al- bescens) are described. Fertile material of T. arctoparmeliae has been studied, with the result that this species is combined as Sphaerellothecium arctoparmeliae. A revised key to all known lichenicolous species of Intralichen and Trimmatostroma is given.</p
Three new combinations in the genus <i>Fulvophyton</i> (<i>Roccellographaceae, Arthoniales</i>)
No full textNew entities in Physcia aipolia-P-caesia group (Physciaceae, Ascomycetes) : an analysis based on mtSSU, ITS, group I intron and betatubulin sequences
No full textWe have revisited the phylogenetic evaluation of the Physcia aipolia-P. caesia lichen group (sect. Caesiae; Physciaceae, Lecanorales) in order to investigate whether new sequence data and extensive sampling can help us to understand the phylogenetic relationships in that group. We combined partial mtSSU DNA data with two previously used nuclear gene regions (betatubulin, ITS) and a group I intron. We also compared the resulting phylogenies with chemical and morphological characters. Altogether 52 specimens of the P. aipolia-P. caesia group were analysed. Direct optimization of the molecular data revealed several well-supported groups. Our results essentially agreed with those of the earlier studies, and we were able to confirm the independent taxonomic status of some controversial morphotaxa. We also discovered at least two distinct clades that potentially represent species new to science. A new nomenclatural combination, Physcia alnophila (Vain.) Loht., Moberg, Myllys & Tehler, is proposed.</p
The taxonomy of the genera Dirina and Roccellina (Roccellaceae)
No full textDirina and Roccellina are two lichen genera in the Roccellaceae. Both are herein monographed world wide. Thirty species, two subspecies, and six forms are recognized. The study includes detailed information on taxonomy, nomenclature, history, morphology, anatomy, chemistry, distribution and habitat. Mechanisms for the establishment of sorediate morphs of lichens are discussed. A cladistic relationship is proposed. A key to all taxa is given. Eleven species, and four forms are new. Sixteen new combinations are proposed.</p
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