Placidozoa

Placidozoa is a recently defined non-photosynthetic infraphylum-level lineage of Stramenopiles.^[1][2][3]

Placidozoa
Opalina ranarum, a species of placidozoan
Scientific classification
Domain:	Eukaryota
Clade:	Sar
Clade:	Stramenopiles
Phylum:	Bigyra
Subphylum:	Opalozoa
Infraphylum:	Placidozoa Cavalier-Smith 2013[1]
Classes
Nanomonadea Placididea Opalomonadea Opalinata Opalinea Blastocystea

Phylogeny

In 2016, Philippe Silar presented the following phylogeny for the Placidozoa:^[4]

Placidozoa	Placididea Nanomonadea Opalomonadea Opalinata Blastocystea Opalinea

Taxonomy

• Infraphylum Placidozoa Cavalier-Smith 2013
  • Class Placididea Moriya, Nakayama & Inouye 2002
    • Order Placidida Moriya, Nakayama & Inouye 2002 [Placidae Cavalier-Smith 2006]
      • Family Placidiaceae Moriya, Nakayama & Inouye 2002
        • Genus Pendulomonas Tong 1997
        • Genus Placidia Moriya, Nakayama & Inouye 2002
        • Genus Wobblia Moriya, Nakayama & Inouye 2000
        • Genus Allegra Rybarski et al. 2015
  • Class Nanomonadea Cavalier-Smith 2013
    • Order Uniciliatida Cavalier-Smith 2013
      • Family Solenicolidae Cavalier- Smith 2013
        • Genus Solenicola Pavillard 1916
      • Family Incisomonadidae Cavalier-Smith & Scoble 2013
        • Genus Incisomonas Scoble & Cavalier-Smith 2013
  • Class Opalomonadea Cavalier-Smith 2013
    • Genus Barthelona Bernard, Simpson & Patterson 2000
    • Genus Quasibodo Bernard, Simpson & Patterson 2000
  • Superclass Opalinata Wenyon 1926 emend. Cavalier-Smith 1996 stat. n. 2006
    • Class Blastocystea Zierdt et al. 1967 [Blastocysta Zierdt 1978; Blastocystina Zierdt 1978]
      • Order Blastocystida Zierdt 1978
        • Family Blastocystidae Jiang & He 1988 non Jaekel 1918
          • Genus Blastocystis Alexeev 1911 non Jaekel 1918
    • Class Opalinea Wenyon 1926 stat. n. Cavalier-Smith 1993 emend. Cavalier-Smith 2013
      • Order Proteromonadida Grassé 1952 emend. Cavalier-Smith 1993 [Proteromonadea Caval.-Sm. 1997]
        • Family Proteromonadidae Grassé 1952
          • Genus Proteromonas Kunstler 1883 [Prowazekella Alexeieff 1912]
      • Order Opalinida Poche 1913 stat. n. Hall 1953 emend. Cavalier-Smith
        • Family Karotomorphidae Travis 1934 [Karotomorphida Cavalier-Smith 1993]
          • Genus Karotomorpha Travis 1934 [Tetramastix Alexeieff 1916 non Zacharias 1898]
        • Family Opalinidae Claus 1874
          • Genus Bezzenbergia Earl 1973
          • Genus Hegneriella Earl 1971
          • Genus Cepedea Metcalf 1920
          • Genus Opalina Purkinje & Valentin 1835
          • Genus Protozelleriella Delvinquier, Markus & Passmore 1991
          • Genus Zelleriella Metcalf 1920
          • Genus Protoopalina Metcalf 1918