Abstract

Abstract A new species of the genus Scrippsiella, Scrippsiella ramonii sp. nov. is described on the basis of observations with light and electron microscopes. The culture was obtained from germination of a resting cyst collected in surface sediments of the Gulf of Naples (Italy). S. ramonii is a peridinioid, autotrophic, marine dinoflagellate characterized by a strong dorso-ventral compression and by the presence of a small horn on the hypotheca. The resting cyst is ovoid and ornamented with numerous long calcareous spines. The plate pattern of vegetative cells and the morphological characters of the resting cyst are remarkably similar to those of S. precaria Montresor et Zingone, described from the same geographic area.

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