Abstract
A new coccolithophorid genusJomonlithus withJ. littoralis as the type species, is described based on specimens isolated from a sand sample collected at the mouth of Nakagawa river, Ibaraki, Japan. This genus is characterized by the coccolith which is composed of an organic base-plate scale and calcified rim elements made up of two different subelements.J. littoralis has been found in several localities along the coast of Japan. Culture and ultrastructure studies gave special attention to the cell cycle, coccolith and scale morphology and the ultrastructure of the cellular organelles. It was confirmed thatJomonlithus is similar toWigwamma Mantonet al., Papposphaera Tangen andPappomonas Manton et Oates on the basis of coccolith morphology and toCricosphaera Braarud andHymenomonas Stein in cellular structure.
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Inouye, I., Chihara, M. Ultrastructure and taxonomy ofJomonlithus littoralis gen. et sp. nov. (Class prymnesiophyceae), a coccolithophorid from the Northwest Pacific. Bot. Mag. Tokyo 96, 365–376 (1983). https://doi.org/10.1007/BF02488181
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DOI: https://doi.org/10.1007/BF02488181