''Plagioselmis'' is a

genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...

of cryptophytes, including the

species A species () is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. It is the basic unit of Taxonomy (biology), ...

'' Plagioselmis punctata''. ''Plagioselmis'' was first described by Butcher in 1967 as a saltwater life form. In 1994, Novarino placed the

freshwater Fresh water or freshwater is any naturally occurring liquid or frozen water containing low concentrations of dissolved salts and other total dissolved solids. The term excludes seawater and brackish water, but it does include non-salty mi ...

''Rhodomonas minuta'' into the genus, giving it the new binomial name of ''Plagioselmis nannoplanctica''. ''P. nannoplanctica'' is the only freshwater species in this genus. ''Rhodomonas'' was first described by Klaveness, who agreed with the reclassification. The cells are comma-shaped and appear red or similar colors. Some strains within the genus appear to have a

furrow A plough or ( US) plow (both pronounced ) is a farm tool for loosening or turning the soil before sowing seed or planting. Ploughs were traditionally drawn by oxen and horses but modern ploughs are drawn by tractors. A plough may have a wooden, ...

, while other do not. Researchers have suggested that those without furrows should be placed into a new genus.

References

Cryptista genera {{Cryptomonad-stub