Heterotrophic flagellates and other protists from Southampton Water, U.K.

Abstract

The diversity of heterotrophic nanoflagellates and other protists was examined at various sites around Southampton Water (U.K.) between 1991 and 1994. Observations were made on species occurring in enrichment cultures, in freshly collected material concentrated by gentle centrifugation, and on electron microscope whole mounts. The species described belong to the apusomonads, cercomonads, dinoflagellates, euglenids, stramenopiles and thaumatomonads or else are of uncertain taxonomic affinities (Protista incertae sedis). Choanoflagellate species found during the study are described elsewhere (Tong 1997). Five new species are described: Luffisphaera hamatus n. sp., Ministeria vibrans n. sp., Pendulomonas adriperis n. gen., n. sp., Rigidomastix devoratum n. sp., and Thaumatomastix thomseni n. sp.