Spironematellidae

Spironematellidae
Hemimastix amphikineta
Scientific classification
Domain: Eukaryota
Phylum: Hemimastigophora
Class: Hemimastigea
Order: Hemimastigida
Family: Spironematellidae
Silva 1980 emend. Shɨshkin 2022
Genera
Synonyms

Spironematellidae (previously known as Spironemidae) 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.

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

Classification

The classification of Spironematellidae, as of 2022:

Spironematella multiciliata
  • Hemimastix Foissner, Blatterer & Foissner, 1988
    • H. amphikineta Foissner, Blatterer & Foissner, 1988
    • H. kukwesjijk Eglit & Simpson, 2018
  • 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)

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