Monterey Bay Aquarium Research Institute
Marine Botany

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Nongeniculate corallines

Nongeniculate corallines are an extraordinary group of algae filled with much innovation and creativity. They are found in every ocean from the poles to the tropics on anything from rocks, plants, shells of living animals or in other algae or simply unattached. One can find this algae in the intertidal zone and in the deep subtidal. Due to their calcified cell walls, corallines have a significant number of fossils especially compared to other algae.

The nongeniculate corallines can also be called the nonarticulated corallines. Genicula refers to the uncalcified joints that are alternated with calcified segments in some red algae. The geniculate and nongeniculate corallines have similarities and differences. This website only deals with nongeniculate corallines (website of geniculate corallines). Nongeniculate corallines are often called crustose corallines, but this is technically a more specialized definition within the group (picture of a noncrustose nongeniculate coralline). 

A nongeniculate coralline is easily identifiable by its bright pink to reddish color and hard thallus. However, distinguishing which coralline it is exactly is often a much more difficult task. Because of this their nomenclature contains many uncertainties and often are left unidentified in many studies. Tips to identify corallines.

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© 2001 Melissa Roth