Mitosporic fungi ('Fungi Imperfecti') and myxomycetes have been excluded, since they would expand the range of these keys beyond what was initially intended, although numerous species of both groups occur on dung when incubated in a damp chamber. For mitosporic fungi see Seifert, Kendrick & Murase (1983) and Ellis & Ellis (1988); for myxomycetes see Eliasson & Lundqvist (1979). As practical keys, rather than a taxonomic treatment, taxonomic authorities have not been cited. For ascomycetes, Cannon, Hawksworth & Sherwood-Pike (1985) have been followed, unless there is a more recent treatment of a group. For the basidiomycetes the 'New Checklist of British Agarics and Boleti' (Dennis, Orton & Hora, 1960, _Supplement to the Transactions of the British Mycological Society_ 43) has been followed, and _The British Fungus Flora_ (Orton & Watling, 1979 and Watling, 1982). ASCOMYCETE REFERENCES Ahmed, S. I. & Cain, R. F. (1972). Revision of the genera _Sporormia_ and _Sporormiella_. _Canadian Journal of Botany_ 50, 419-477. (Keys and descriptions of 66 spp.). Apinis, A. E. (1964). Revision of the British Gymnoascaceae. _Mycological Paper_ 96. Arx, J. A. von (1971). On _Arachniotus_ and related genera of the Gymnoascaceae. _Persoonia_ 6, 371-380. Arx, J. A. von (1975). Revision of _Microascus_ with the description of a new species. _Persoonia_ 8, 191-197. Arx, J. A. von (1975). On _Thielavia_ and some similar genera of Ascomycetes. _Studies in Mycology_ 8. Arx, J. A. von (1982). A key to the species of _Gelasinospora_. _Persoonia_ 11, 443-449. Arx, J. A. von (1986). The ascomycete genus _Gymnoascus_. _Persoonia_ 13, 173-183. Arx, J. A. von (1987). A re-evaluation of the Eurotiales. _Persoonia_ 13, 273-300. (Keys to families and genera). Arx, J. A. von, Dreyfuss, M. & Müller, E. (1984). A re-evaluation of _Chaetomium_ and the Chaetomiaceae. _Persoonia_ 12, 169-179. (Key to species). Arx, J. A. von, Figueras, M. J. & Guarro, J. (1988). Sordariaceous Ascomycetes without Ascospore Ejaculation. _Beihefte zur Nova Hedwigia_ 94, 1-104. Arx, J. A. von, & Gams, W. (1967). Über _Pleurage verruculosa_ und die zugehörige _Cladorrhinum_-Konidienform. _Nova Hedwigia_ 13, 198-208. Arx, J. A. von, Guarro, J. & van der Aa, H. A. (1987). _Asordaria_, a new genus of the Sordariaceae, and a new species of _Melanocarpus_. _Persoonia_ 13, 263-272. Barrasa, J. M. & Checa, J. (1990). Dothideales del Parque Natural de Monfragüe Cáceres. I. _Boletín Sociedad Micológica de Madrid_ 15, 91-102. Barrasa, J. M., Lundqvist, N. & Moreno, G. (1986). Notes on the genus _Sordaria_ in Spain. _Persoonia_ 13, 83-88. Bell, A. & Mahoney, D. P. (1995). Coprophilous fungi in New Zealand. I. _Podospora_ species with swollen agglutinated perithecial hairs. _Mycologia_ 87, 375-396. (Key and descriptions of 8 spp.).