Chitinozoa (English singular: chitinozoan, plural: chitinozoans) are a group of flask-shaped marine microfossils (50-2000 micrometres) which appear dark or almost opaque when viewed using a light microscope. They are used as stratigraphic markers in biostratigraphy from uppermost Cambrian through Ordovician and Silurian to Devonian.
Alfred Eisenack was the first to give a detailed description of chitinozoa in 1931.
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