Craspedida is an order of choanoflagellate, with members with an exclusively organic covering. Crown group craspedids (and perhaps crown group choanoflagellates if Acanthoecida arose within Craspedida[1]) appeared 422,78 million years ago.[2] Although a previous study from 2017 recovered the divergence of the crown group choanoflagellates (craspedids) at 786.62 million years.[3]
| Craspedida | |
|---|---|
| |
| phase contrast image of Monosiga brevicollis | |
Scientific classification 
| |
| Domain: | Eukaryota |
| Class: | Choanoflagellatea |
| Order: | Craspedida Cavalier-Smith, 1997, emend. Nitsche et al. 2011 |
| Families | |
Craspedid genera
editS. rosetta has been named for the rosette-shaped colonies formed by its cells. Recent studies show a bacterial sulfonolipid, called rosette inducing factor (RIF-1) produced by Algoriphagus machipongonensis triggers colony formation in S. rosetta.[citation needed]
References
edit- ^ Carr, Martin; Leadbeater, Barry S. C. (2022-12-01). "Re-evaluating Loricate Choanoflagellate Phylogenetics: Molecular Evidence Points to the Paraphyly of Tectiform Species". Protist. 173 (6): 125924. doi:10.1016/j.protis.2022.125924. ISSN 1434-4610.
- ^ Schiwitza, Sabine; Gutsche, Lennart; Freches, Eric; Arndt, Hartmut; Nitsche, Frank (2021-06-01). "Extended divergence estimates and species descriptions of new craspedid choanoflagellates from the Atacama Desert, Northern Chile". European Journal of Protistology. 79: 125798. doi:10.1016/j.ejop.2021.125798. ISSN 0932-4739.
- ^ Dohrmann, Martin; Wörheide, Gert (2017-06-15). "Dating early animal evolution using phylogenomic data". Scientific Reports. 7 (1): 3599. doi:10.1038/s41598-017-03791-w. ISSN 2045-2322. PMC 5472626.
- Extended phylogeny of the Craspedida (Choanomonada). Alexandra Jeuck, Hartmut Arndt and Frank Nitsche, European Journal of Protistology, Volume 50, Issue 4, August 2014, Pages 430–443, doi:10.1016/j.ejop.2014.06.001
External links
edit
Media related to Craspedida at Wikimedia Commons- 'Craspedida at the World Register of Marine Species (WoRMS)
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