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Description of Spironemidae

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Circumscription: Multiflagellated heterotrophic protists, usually elongate body. Flagella arranged in a small number of longitudinal rows (kineties). Body surface underlain by one large dorsal organic plate and one large ventral organic plate. Ultrastructural identity: Mitochondria cristal form ambiguous but probably tubular or sacculate. With flagella arising from short basal bodies and anchored by longitudinal fibrous and microtubular elements. With dictyosomes. Cell surface folded, underlain by microtubules and organic layers. Concentric extrusomes. Synapomorphy: Mitochondriate protist with flagella in kinetics and with two subsurface organic plates.
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Spironemidae

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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 Spironema terricola (43 × 3 μm), and are united by the possession of two rows of cilia, called kineties.[1]

Phylogenomic analysis shows that Hemimastigophora are a distinct and ancient lineage of eukaryotic organisms, forming a possible sister clade to the supergroup Diaphoretickes.[2][3]

Taxonomy

References

  1. ^ Ilse Foissner & Wilhelm Foissner (1993). "Revision of the family Spironemidae Doflein (Protista, Hemimastigophora), with description of two new species, Spironema 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.
  2. ^ 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.
  3. ^ 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.
  4. ^ "Part 1 - Virae, Prokarya, Protists, Fungi". Collection of genus-group names in a systematic arrangement. Archived from the original on 14 August 2016. Retrieved 30 June 2016.
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Spironemidae: Brief Summary

provided by wikipedia EN

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 Spironema 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.

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