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
John Lightfoot (biologist) "Ryssus", but including also "Lichen" as "Algae Terrestres", terrestrial algae. Only nine genera of fungi are recognised in the book: "Agaricus", "Boletus", "Hydnum", "Phallus", "Helvella", "Peziza", "Clavaria", "Lycoperdon", and "Mucor" (listed on page 645); a tenth fungal genus, "Tremella" is covered, but included among his algae. "Scottish Fungi" note that "While his classification might be a bit wonky by today's understanding, most of the species he recorded can be traced to modern taxa", and that he provided the first British records for the chanterelle and the summer truffle. The book has an "English and Scotch Index of the Names of