organicwalled
Organicwalled, also written organic-walled, describes microfossils and other biological structures whose enclosing walls are composed primarily of organic material rather than mineral substances such as silica or calcium carbonate. The term is widely used in palynology, micropaleontology, and related fields to distinguish these forms from calcareous- or siliceous-walled counterparts.
Wall materials typically include sporopollenin, kerogen, chitin, cellulose, and various proteins. These walls are often highly
Common examples include spores and pollen grains, dinoflagellate cysts, and acritarchs; other taxa such as chitinozoans
Applications and significance: Organic-walled microfossils are essential for biostratigraphy and paleoenvironmental reconstruction. They yield information on