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Scientific classification
Domain: Eukaryota
Phylum: Cryptophyta
Class: Cryptophyceae
Order: Cryptomonadales
Family: Cryptomonadaceae
Genus: Plagioselmis
Butcher, 1967

Plagioselmis is a genus of cryptophytes, including the species Plagioselmis prolonga,[1] Plagioselmis punctata[2] and Plagioselmis nanoplantica.[3]

Plagioselmis was first described by Butcher in 1967 as a saltwater life form. In 1994, Novarino placed the freshwater Rhodomonas minuta into the genus, giving it the new binomial name of Plagioselmis nanoplantica. Nanoplantica is the only freshwater species in this genus.[3] Rhodomonas was first described by Klaveness, who agreed with the reclassification.[4]

The cells are comma-shaped and appear red or similar colors. Some strains within the genus appear to have a furrow, while other do not. Researchers have suggested that those without furrows should be placed into a new genus.[3]


  1. ^ B. H. Kim, M. S. Han & N. Takamura (June 2003). "Effects of fish introduction on the length of the tail of cryptomonads in mesocosm experiments". Oecologia. 136 (1): 73–79. PMID 12820066. doi:10.1007/s00442-003-1226-3. 
  2. ^ "Plagioselmis". Integrated Taxonomic Information System. 
  3. ^ a b c Wehr, John D.; Sheath, Robert G.; Kociolek, J. Patrick (2015-06-05). Freshwater Algae of North America: Ecology and Classification. Elsevier. p. 840. ISBN 9780123858771. 
  4. ^ Archiv für Hydrobiologie: Supplement volume. E. Schweizerbart. 2001-01-01. p. 112.