Phospholipid-derived fatty acids microbial classes when in fact those PLFAs are present in a broad range of life forms. Phospholipids can occur in many biological classes (such as in plant roots, fungi, as well as in soil bacteria), so care has to be taken in over-assigning PLFA biomarkers to the wrong class. Even though phospholipids occur in many different life forms, the fatty acid side chains between differing life forms can be quite unique. Polyunsaturated fatty acids ("e.g." 18:3 ω3c) are found in plants, algae and cyanobacteria, but are often not present in bacteria. Monounsaturated fatty acids (particularly at the omega-7 position), odd-chain
International Code of Nomenclature for algae, fungi, and plants International Botanical Congress have produced revised versions of these "Rules", later called the "International Code of Botanical Nomenclature", and then "International Code of Nomenclature for algae, fungi, and plants". The Nomenclature Section of the 18th International Botanical Congress in Melbourne, Australia (2011) made major changes: Some important versions are listed below. Specific to botany More general International Code of Nomenclature for algae, fungi, and plants The International Code of Nomenclature for algae, fungi, and plants (ICN) is the set of rules and recommendations dealing with the formal botanical names that are given to plants, fungi and a few other groups