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The complex and diverse world of fungi is a captivating place. It can be explored from the comfort of your own home, without ever having to wear a suit or take a long hike through the forest. There are 37,000+ different types that have been discovered so far, and millions more to be found as researchers continue their work into this unique realm. In 1979, Alexopoulos and Mims published an influential classification system for fungi in Science magazine. Their system has been updated numerous times since its creation thanks to new research and discoveries made by other scientists in the field. As time goes on, their list continues to grow with each update. Fungi are placed into one of two major groups: macroscopic and microscopic. Both groups are further broken down into smaller groups based on their appearance, where they grow, how they interact with other organisms in their environment, and many other factors. This is where all species of fungi are placed. The membership consists of two classes: zygomycetes and ascomycetes. As the name implies, this class is made up of single-celled zygomycete fungi. They are generally considered microscopic, with the largest reaching sizes of 0.5 mm in diameter. Classified under them are also several genera that do not fit into any other groups. These genera include endogone, cytospora, and peronospora (commonly known as causes of late blight on potatoes). Many species in this group are parasites that spend their entire lifecycle within another organism. For example: "Cryptococcus neoformans" and "Aspergillus fumigatus" spend their lives as the bacteria that cause cryptococcosis and aspergillosis, respectively. This group contains fungi that are larger than most species of yeast. The largest species has been measured at 9 mm in diameter, with one reported to reach a length of 22 cm (7.57 in). Although they may not be the size of most other fungi, most species of this group are microscopic and spend their entire lifecycle within another organism. Two main types can be found here: Deuteromycetes and Zygomycetes. Deuteromycetes are the more widespread and widespread of the two, and include fungi that grow as parasites on other organisms. The largest species has been measured at 3 cm in diameter. Zygomycetes can be further broken into white and black: "Rhizopus stolonifer" and "Schizosaccharomyces pombe". This group contains those fungi that appear as multicellular filaments. Most of these filamentous fungi do not form visible fruiting bodies, so they are difficult to identify. cfa1e77820
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