Craspedida

Craspedida
	phase contrast image of Monosiga brevicollis
Scientific classification
Domain:	Eukaryota
Clade:	Amorphea
Class:	Choanoflagellata
Order:	; 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]

^ 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. PMID 36327744.
^ 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. PMID 33984646.
^ Dohrmann, Martin; Wörheide, Gert (2017-06-15). "Dating early animal evolution using phylogenomic data". Scientific Reports. 7 (1): 3599. Bibcode:2017NatSR...7.3599D. doi:10.1038/s41598-017-03791-w. ISSN 2045-2322. PMC 5472626. PMID 28620233.

[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. PMID 36327744.

[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. PMID 33984646.

[3] Dohrmann, Martin; Wörheide, Gert (2017-06-15). "Dating early animal evolution using phylogenomic data". Scientific Reports. 7 (1): 3599. Bibcode:2017NatSR...7.3599D. doi:10.1038/s41598-017-03791-w. ISSN 2045-2322. PMC 5472626. PMID 28620233.

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