The dinoflagellate family pareodiniaceae: A discussion

Publisher Website
Google Scholar
Abstract
The history of study of the Family Pareodiniaceae Gocht 1957 is reviewed. The morphology of the type genus Pareodinia Deflandre 1947 is discussed in the terms of shape, size, reflected tabulation, archeopyle, surface ornamentation, and the significance of the kalyptra, an outer mantle of flocculent organic matter. It is suggested that the kalyptra is a characteristic of the family and is preserved usually when there is minimum mechanical and chemical damage. The genera Paranetrelytron Sarjeant 1966 and Netrelytron Sarjeant 1961 differ from Pareodinia Deflandre 1947 and Kalyptea Cookson and Eisenack 1960 only in the possession of a pseudoendoblast. The morphology of other members of the Pareodiniaceae, including Komewuia Cookson and Eisenack 1960, Caligodinium Drugg 1970, Pluriarvalium Sarjeant 1962, Imbatodinium Vozzhennikova 1967, and the holotype for Broomea Cookson and Eisenack 1958, shows remarkable consistency in reflected tabulation and archeopyle with that of Pareodinia. The Family Pareodiniaceae Gocht 1957 and the genera Pareodinia Deflandre 1947 and Kalyptea Cookson and Eisenack 1960 are emended. The genera Paranetrelytron, Imbatodinium, Pluriarvalium, and Broomea are placed in synonymy with the genus Pareodinia. The genera Netrelytron and Komewuia are placed in synonymy with the genus Kalyptea. Four new species, Pareodinia alaskensis, Pareodinia arctica, Pareodinia minuta, and Pareodinia robusta; 1 new name, Pareodinia dasyforma; 1 new subspecies, Pareodinia osmingtonense subsp. rostrata; and 10 new combinations are proposed in the Family Pareodiniaceae. The new genus Necrobroomea and 7 new combinations are proposed in the Family Canningiaceae Sarjeant and Downie 1966.