Spironematellidae

Family of heterotrophic flagellates, in the group Hemimastigophora

Spironematellidae

Hemimastix amphikineta
Scientific classification
Domain:	Eukaryota
Phylum:	Hemimastigophora
Class:	Hemimastigea
Order:	Hemimastigida
Family:	Spironematellidae Silva 1980 emend. Shɨshkin 2022^[1]
Genera
Hemimastix Spironematella Stereonema
Synonyms
Paramastigaceae Skuja 1948 Spironemidae Doflein 1916

Spironematellidae (previously known as Spironemidae)^[1] is a family of heterotrophic flagellates, in the group Hemimastigophora. They vary in size and shape from the ellipsoid Hemimastix amphikineta (14 × 7 μm) to the vermiform Spironematella terricola (43 × 3 μm), and are united by the possession of two rows of cilia, called kineties.^[2]

Phylogenomic analysis shows that Hemimastigophora are a distinct and ancient lineage of eukaryotic organisms, forming a possible sister clade to the supergroup Diaphoretickes.^[3]^[4]

Classification

The classification of Spironematellidae, as of 2022:^[1]

Hemimastix Foissner, Blatterer & Foissner, 1988
- H. amphikineta Foissner, Blatterer & Foissner, 1988
- H. kukwesjijk Eglit & Simpson, 2018^[3]
Stereonema Foissner & Foissner 1993 non Kützing 1836
- S. geiseri Foissner & Foissner 1993
Spironematella Silva 1970 emend. Shɨshkin 2022 (=Spironema Klebs 1893 non Vuillemin 1905 non Léger & Hesse 1922 non Rafinesque 1838 non Hochst. 1842 non Lindley 1840 non Meek 1864)
- S. multiciliata (Klebs 1892) Silva 1970 (=Spironema multiciliatum Klebs 1893)
- S. terricola (Foissner & Foissner 1993) Shɨshkin 2022 (=Spironema terricola Foissner & Foissner 1993)
- S. goodeyi (Foissner & Foissner 1993) Shɨshkin 2022(=Spironema goodeyi Foissner & Foissner 1993)

References

^ ^a ^b ^c Shɨshkin, Yegor (2022). "Spironematella terricola comb. n. and Spironematella goodeyi comb. n. (Hemimastigida = Hemimastigea = Hemimastigophora) for Spironema terricola and Spironema goodeyi with diagnoses of the genus and family Spironematellidae amended". Zootaxa. 5128 (2): 295–297. doi:10.11646/zootaxa.5128.2.8. PMID 36101172. S2CID 252220401.
^ Ilse Foissner & Wilhelm Foissner (1993). "Revision of the family Spironemidae Doflein (Protista, Hemimastigophora), with description of two new species, Spironematella terricola n. sp. and Stereonema geiseri n. g., n. sp". Journal of Eukaryotic Microbiology. 40 (4): 422–438. doi:10.1111/j.1550-7408.1993.tb04936.x. S2CID 85124745.
^ ^a ^b Lax, Gordon; Eglit, Yana; Eme, Laura; Bertrand, Erin M.; Roger, Andrew J.; Simpson, Alastair G. B. (14 November 2018). "Hemimastigophora is a novel supra-kingdom-level lineage of eukaryotes". Nature. 564 (7736): 410–414. Bibcode:2018Natur.564..410L. doi:10.1038/s41586-018-0708-8. ISSN 0028-0836. PMID 30429611. S2CID 205570993.
^ Chung, Emily (15 November 2018). "Rare microbes lead scientists to discover new branch on the tree of life". CBC. CBC News. Archived from the original on 17 November 2018. Retrieved 17 November 2018.