generic type is of great importance in defining generic circumscriptions in fungal taxonomy. The generic types of Pleosporales have been studied previously by many mycologists. For instance, Müller and von buy AZD6244 Arx (1962) studied the generic types of “Pyrenomycetes”, and described and illustrated them in detail. Sivanesan (1984) described and illustrated the generic representatives of Loculoascomycetes for both their teleomorphs and anamorphs, and their links were emphasized. A large number of pleosporalean genera have been studied by Barr (1990a, b). Almost all of the previous work was conducted more than 20 years ago, when no molecular phylogenetic studies could be carried out and thus had been carried out in a systematic fashion. Aim and outline of present study The present study had two principal objectives: 1. To explore genera under Pleosporales based on the generic types
and provide a detailed description and illustration for the type species of selected genera, discuss the study history of click here those genera, and explore their ordinal, familial, and generic relationships; 2. To investigate the phylogeny of Pleosporales, its inter-familial relationships, and the morphological circumscription of each family; In order to clarify morphological characters, the generic types of the majority of teleomorphic pleosporalean genera (> 60%) were studied. Most of them are from the “core families” of Pleosporales, i.e. Delitschiaceae, Lophiostomataceae, Massariaceae, Massarinaceae, Melanommataceae, Montagnulaceae, Phaeosphaeriaceae, Phaeotrichaceae, Pleomassariaceae, Pleosporaceae, Sporormiaceae and Teichosporaceae. Notes are given for those where type specimens could not be obtained during the timeframe
of this study. A detailed description and illustration of each generic type is provided. Comments, notes and problems that need to be addressed are provided for each genus. Phylogenetic investigation based on five nuclear loci, viz. LSU, SSU, RPB1, RPB2 and TEF1 was carried out using available strains from numerous genera in Pleosporales. In total, 278 pleosporalean taxa are included in the phylogenetic analysis, which form 25 familial clades on the dendrogram (Plate 1). The suborder, Massarineae, is emended Paclitaxel supplier to accommodate Lentitheciaceae, Massarinaceae, Montagnulaceae, Morosphaeriaceae and Trematosphaeriaceae. Materials and methods Molecular phylogeny Four genes were used in this analysis, the large and small subunits of the nuclear ribosomal RNA genes (LSU, SSU) and two protein coding genes, namely the second largest subunit of RNA polymerase II (RPB2) and translation elongation factor-1 alpha (TEF1). All sequences were downloaded from GenBank as listed in Table 3. Each of the individual ribosomal genes was aligned in SATé under default settings with at least 20 iterations. The protein coding genes were aligned in BioEdit (Hall 2004) and completed by manual adjustment.