Rigifilida

Rigifilida
Scientific classification
Domain:	Eukaryota
Clade:	Opimoda
Clade:	CRuMs
Order:	Rigifilida; Cavalier-Smith 2012
Family
	Micronucleariidae; Rigifilidae;

Rigifilida is a clade of non-ciliate phagotrophic eukaryotes. It consists of two genera: Micronuclearia and Rigifila.

Characteristics

Cells of rigifilids are covered with either a single or a double-layered submembrane pellicular lamina that makes them rigid in consistence. Slender branching filopodia emanate from a ventral aperture of the cell and are employed to collect bacteria upon which they feed and to attach the organism to the substratum. Around this aperture, the pellicle is reflexed around forming a peristomial collar. Other notable features are flat and irregular shaped mitocondrial cristae, a single dorsal nucleus and the lack of centrioles and cilia.[1]

Phylogeny

Scotokaryota

Metamonada Cavalier-Smith 1987 emend. Cavalier-Smith 2003

Opimoda

Ancyromonadida Cavalier-Smith 1998 emend. Atkins 2000

Malawimonadea Cavalier-Smith 2003

Amorphea

Amoebozoa Lühe 1913 emend. Cavalier-Smith 1998

Obazoa

Breviatea Cavalier-Smith 2004

	Apusomonadida Karpov & Mylnikov 1989

	Opisthokonta

CRuMs[2]

Mantamonadida Cavalier-Smith 2004

	Rigifilida Karpov & Mylnikov 1989

	Diphylleida Cavalier-Smith 1993

Taxonomy

Rigifilida is currently placed in CRuMs.[3]

Order Rigifilida Cavalier-Smith 2012 [Micronucleariida Cavalier-Smith 2008]
- Family Rigifilidae Yabuki & Cavalier-Smith 2012
  - Genus Rigifila Yabuki & Cavalier-Smith 2012
    - Species Rigifila ramosa Yabuki & Cavalier-Smith 2012
- Family Micronucleariidae Cavalier-Smith 2008
  - Genus Micronuclearia Mikrjukov & Mylnikov 2001
    - Species Micronuclearia podoventralis Mikrjukov & Mylnikov 2001

References

Yabuki, A., Ishida, K-I., Cavalier-Smith, T. (2013) Rigifila ramosa n. gen., n. sp., a Filose Apusozoan with a Distinctive Pellicle, is Related to Micronuclearia. Protist 164, 75-88.
Brown, Matthew W; Heiss, Aaron A; Kamikawa, Ryoma; Inagaki, Yuji; Yabuki, Akinori; Tice, Alexander K; Shiratori, Takashi; Ishida, Ken-Ichiro; Hashimoto, Tetsuo (2018-01-19). "Phylogenomics Places Orphan Protistan Lineages in a Novel Eukaryotic Super-Group". Genome Biology and Evolution. 10 (2): 427–433. doi:10.1093/gbe/evy014. ISSN 1759-6653. PMC 5793813. PMID 29360967.
Adl, Sina M.; Bass, David; Lane, Christopher E.; Lukeš, Julius; Schoch, Conrad L.; Smirnov, Alexey; Agatha, Sabine; Berney, Cedric; Brown, Matthew W. (2018-09-26). "Revisions to the Classification, Nomenclature, and Diversity of Eukaryotes". Journal of Eukaryotic Microbiology. 66 (1): 4–119. doi:10.1111/jeu.12691. ISSN 1066-5234. PMC 6492006. PMID 30257078.

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[1] Yabuki, A., Ishida, K-I., Cavalier-Smith, T. (2013) Rigifila ramosa n. gen., n. sp., a Filose Apusozoan with a Distinctive Pellicle, is Related to Micronuclearia. Protist 164, 75-88.

[Brown_2018-2] Brown, Matthew W; Heiss, Aaron A; Kamikawa, Ryoma; Inagaki, Yuji; Yabuki, Akinori; Tice, Alexander K; Shiratori, Takashi; Ishida, Ken-Ichiro; Hashimoto, Tetsuo (2018-01-19). "Phylogenomics Places Orphan Protistan Lineages in a Novel Eukaryotic Super-Group". Genome Biology and Evolution. 10 (2): 427–433. doi:10.1093/gbe/evy014. ISSN 1759-6653. PMC 5793813. PMID 29360967.

[3] Adl, Sina M.; Bass, David; Lane, Christopher E.; Lukeš, Julius; Schoch, Conrad L.; Smirnov, Alexey; Agatha, Sabine; Berney, Cedric; Brown, Matthew W. (2018-09-26). "Revisions to the Classification, Nomenclature, and Diversity of Eukaryotes". Journal of Eukaryotic Microbiology. 66 (1): 4–119. doi:10.1111/jeu.12691. ISSN 1066-5234. PMC 6492006. PMID 30257078.