Systematics of Fungi Fungi are separated into phyla on the basis of their reproductive structures. Because some fungi have never been observed to reproduce sexually, they have no place in the classification. Until their sexual reproduction is identified they are placed in Fungi Imperfecti (Deuteromycetes). DNA sequencing is giving the mycologists answers. Most of the taxa so far sequenced and classified are ascomycetes, with only a few basidiomycetes and fewer still zygomycetes. Another problem group is the Chytridiomycota (chytrids), which arguably may belong with the Protoctists, not the fungi. Phylogeny No clearcut ancestral lineage for the fungi has been established, but on the basis of molecular DNA sequencing and morphological evidence it seems likely that the fungal life style arose many times from different protoctists. The fungi and animals are on the same originating branch. Within the
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This note was uploaded on 11/14/2011 for the course BIO 1421 taught by Professor Farr during the Fall '08 term at Texas State.