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application to CABI Publishing, CAB International, Wallingford, Oxon, OX10 8DE. It can be purchased on-line at www.cabi-publishing.org

Within the kingdom Fungi are the following phyla:

Ascomycota class Ascomycetes class Saccharomycetes (the ascomycetous yeasts) class Schizosaccharomycetes (the fission yeasts) class Taphrinomycetes Basidiomycota class Basidiomycetes class Urediniomycetes (Rusts) class Ustilaginomycetes (Smuts) Chytridiomycota (mostly microscopic aquatic fungi) class Chytridiomycetes Zygomycota class Zygomycetes (includes bread moulds) class Trichomycetes (associated with insect larvae) Conidial fungi (also termed anamorphic fungi). These are fungi forming asexual conidia, where the sexual sporing stage has yet to be discovered. They were previously referred to as the Deuteromycetes (Fungi imperfecti).

Mycologists continue to study organisms in the Oomycota and Myxomycota, although they are no longer considered to be fungi. For much of the 20th century, all fungi were considered to constitute a single kingdom, the Fungi; but the present view is that Myxomycetes (slime moulds) and their allies are better placed in the kingdom Protozoa, while the Oomycetes, which have cellulose walls, belong in the kingdom Straminipila, along with certain chlorophyll- containing lower plants. The kingdom Fungi still contains all the other groups.

Orders of fungi

The 1994 edition of the Guide to Recording Fungi gave the complete list of the orders of fungi current at that time. Each of the 94 orders was given a two-character code, which had to be entered onto the old record sheets for entry to the BMSFRD.

The list of orders has since been revised and extended and there is little prospect that orders of fungi will remain stable in the long term. It may be possible to devise a simple code system that can take account of complex changes but the two-character codes have been abandoned. Instead, the position of species in the current classification system is recorded in a separate database.

The codes are no longer required as the BMSFRD, linking the two databases together, provides a simple means of selecting and/or sorting records. Some field mycologists regret the passing of the order codes as they provided a simple method of sorting records into the familiar groupings of fungi in a single database. There is no reason why recorders should not continue to use the codes for their own purposes, or devise a coding system to meet their own requirements. The old codes are, however, no longer relevant to the BMSFRD and should not be included in any data submitted. If left in place they will be deleted by the Database Co-ordinator. The table of orders in use in 2004 is printed alphabetically in Appendix 4 as a source of reference, and for comparison with the table of orders included in earlier editions of the Guides for the Mycologist.

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