Rigifilida

Rigifilida
Scientific classification
Clade:	CRuMs
Order:	Rigifilida; Cavalier-Smith 2012
Genera
	Micronuclearia; Rigifila;

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]

Phylogenetic affinities and classification

Rigifilida is currently placed in CRuMs.[2]

Order Rigifilida Cavalier-Smith 2012
- Genus Rigifila Yabuki & Cavalier-Smith 2012
  - Species Rigifila ramosa Yabuki & Cavalier-Smith 2012
- 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.
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.

[2] 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.