Craspedida

Craspedida
phase contrast image of Monosiga brevicollis
Scientific classification
Domain:	Eukaryota
Class:	Choanoflagellatea
Order:	Craspedida Cavalier-Smith, 1997, emend. Nitsche et al. 2011
Families
Codonosigidae Salpingoecidae

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]

Craspedid genera

Codonosiga

Main article: Codonosiga

Proterospongia

Main article: Proterospongia

Salpingoeca

Main article: Salpingoeca

Salpingoeca 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

1. 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.
2. 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.
3. 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

• Media related to Craspedida at Wikimedia Commons
• 'Craspedida at the World Register of Marine Species (WoRMS)