Classification of Fungi

Classification of Fungi - absent in the cells of all other...

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Classification of Fungi Over 60,000 species of fungi are known. Fungi are classified by their method of reproduction (both sexual and asexual). It seems likely that fungi are not a monophyletic group. Historically they have been divided into four taxonomic divisions: Zygomycota, Ascomycota, Basidiomycota, and Deuteromycota. The last group, the Deuteromycota, are not a monophyletic group and thus have no standing in a modern classification scheme. The modern systematic grouping includes the Zygomycota, Ascomycota, and Basidiomycota, as well as the Chytridiomycota. Phylum Chytridiomycota The Phylum Chytridiomycota include some of the oldest fungal fossils (from the latest precambrian of Russia), as well as the presence of flagellated gametes. Flagella are
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Unformatted text preview: absent in the cells of all other fungi. All but one group of this phylum has chitin comprising their cell walls. Chytrids are aquatic, not terrestrial as are almost all other fungi. They thus may provide us with a glimpse of the earliest fungi, both in habit as well as structure. This division also has quite a diverse arrayof body plans and habitats. Allomyces is a chytrid used in some experiments. Phylum Zygomycota The Phylum Zygomycota consists of fewer than 1000 species. The zygomycete hyphae do not have one nucleus per cell, but rather have long multinucleate, haploid hyphae that comprise their mycelia. Asexual reproduction is by spores produced in stalked sporangia , such as shown in Figure 3....
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Classification of Fungi - absent in the cells of all other...

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