Rigifilida
| Rigifilida | |
|---|---|
Scientific classification 
| |
| Domain: | Eukaryota |
| Clade: | CRuMs |
| Phylum: | Rigifilidea Zmitrovich, Perelygin & Zharikov, 2022[2][3] |
| Class: | Hilomonadea Cavalier-Smith 2008, emend. 2012[1] |
| Order: | Rigifilida Cavalier-Smith in Yabuki et al., 2012 |
| Families | |
Rigifilida is a clade of non-ciliate phagotrophic eukaryotes. It consists of two genera: Micronuclearia and Rigifila.
Characteristics
[edit]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.[4]
Phylogeny
[edit]| Opimoda |
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Taxonomy
[edit]Rigifilida is currently placed in CRuMs.[7]
- 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
- Genus Rigifila Yabuki & Cavalier-Smith 2012
- Family Micronucleariidae Cavalier-Smith 2008
- Genus Micronuclearia Mikrjukov & Mylnikov 2001
- Species Micronuclearia podoventralis Mikrjukov & Mylnikov 2001
- Genus Micronuclearia Mikrjukov & Mylnikov 2001
- Family Rigifilidae Yabuki & Cavalier-Smith 2012
References
[edit]- ^ Cavalier-Smith, Thomas (2013). "Early evolution of eukaryote feeding modes, cell structural diversity, and classification of the protozoan phyla Loukozoa, Sulcozoa, and Choanozoa". European Journal of Protistology. 49 (2): 115–178. doi:10.1016/j.ejop.2012.06.001. PMID 23085100.
- ^ Zmitrovich, Ivan V.; Перелыгин, Владимир; Zharikov, Mikhail V. (2025-06-21). "(PDF) Nomenclature and rank correlation of higher taxa of eukaryotes". ResearchGate. Retrieved 2025-06-21.
{{cite web}}: CS1 maint: url-status (link) - ^ Guiry, M.D. & Guiry, G.M. 2025. AlgaeBase. World-wide electronic publication, University of Galway. https://www.algaebase.org; searched on 12 June 2025.
- ^ Yabuki A, Ishida KI, Cavalier-Smith T (2013). "Rigifila ramosa n. gen., n. sp., a Filose Apusozoan with a Distinctive Pellicle, is Related to Micronuclearia". Protist. 164 (1): 75–88. doi:10.1016/j.protis.2012.04.005.
- ^ Yazaki, Euki; Harada, Ryo; Isogai, Ryu; Bamba, Kohei; Ishida, Ken-ichiro; Inagaki, Yuji; Shiratori, Takashi (2025-06-04). "Glissandra oviformis n. sp.: a novel predatory flagellate illuminates the character evolution within the eukaryotic clade CRuMs". Open Biology. 15 (6): 250057. doi:10.1098/rsob.250057. PMC 12133344. PMID 40460873.
- ^ 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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