In the dinophyte genus Ostreopsis, seven out of 11 described species are known to produce various toxic compounds that were characterized in the palytoxins family. Species in the genus shared identical thecal plate patterns but differed in size, shape,

Identification of species of the dinoflagellate genus Ostreopsis is difficult because several species have been poorly described, others misidentified in the literature, and the type species, O. siamensis, has not been described by contemporary taxonomic

Ostreopsis is a genus of dinoflagellates that includes species producing palytoxin and structurally related compounds. The distribution of Ostreopsis species in Australia is largely unknown, but they have been reported from north Queensland (18° S) to

Blooms of benthic dinoflagellates belonging to the tropical genus Ostreopsis are an increasingly common phenomenon in temperate regions worldwide. This is reflected in the rapid upsurge of publications on Ostreopsis from temperate regions since 2000.

In 2004, Ostreopsis siamensis Schmidt blooms were detected for the first time on the central upwelling coast of Morocco by the HAB and phycotoxins monitoring program. The species identification was confirmed by genetic studies. In October 2004, O. siamensis