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Revision of the genusTetraselmis (Class Prasinophyceae)

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Abstract

Information available on the structure of species belonging to the generaTetraselmis, Platymonas andPrasinocladus has been reviewed. Detailed comparison of these data has convinced the authors that species in these genera all belong to the same genus. Stalk development by cast-off thecae, a characteristic used to definePrasinocladus, is variable within different species and is not reliable for separation of a genus. Similarly, the penetration of the pyrenoid by a lobe of the nucleus cannot be held reliable in separation of these genera because it occurs in varying degree in different species.Platymunas G.S. West (1916),Prasinocladus Kuckuck (1894) andAulacochlamys Margalef (1946) are considered to be synonyms ofTetraselmis Stein (1878).Tetraselmis is redescribed using characters visible with light and electron microscopy as well as life-history characteristics. The description reviews information on many species ofTetraselmis that have been found in the western and eastern Pacific as well as species from Great Britain. It is determined that variations in life-histories may be explained by different environmental factors, whereas structure of vegetative cells, as viewed by electron microscopy, seems to be quite stable and characteristic for each species.

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Norris, R.E., Hori, T. & Chihara, M. Revision of the genusTetraselmis (Class Prasinophyceae). Bot Mag Tokyo 93, 317–339 (1980). https://doi.org/10.1007/BF02488737

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