Yorgiidae

Yorgiidae; Temporal range: 635.0–541.0 Ma PreꞒ Ꞓ O S D C P T J K Pg N Ediacaran
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	†Proarticulata
Class:	†Cephalozoa
Family:	†Yorgiidae; Ivantsov, 2001
Genera
	† Yorgia; † Archaeaspinus; † Praecambridium ?;

Yorgiidae is an extinct family of cephalozoans, which lived 635 million years ago.^[1] They were filter fed.^[2]

Description

Like most proarticulates, they present semi-bilateral symmetry. They had a discoid appearance, with the body segmented by isomers.

Distribution

Ediacaran of Russian Federation and South Australia.^[1]

Gallery

Archaeaspinus fedonkini
Other fossil of Archaeaspinus fedonkini
Epibaion waggoneri, possible ichnofossil of Yorgia waggoneri

References

^ ^a ^b Distribution age in the paleontology database
^ Budd, Graham E.; Jensen, Sören (2017). "The origin of the animals and a 'Savannah' hypothesis for early bilaterian evolution". Biological Reviews. 92 (1): 446–473. doi:10.1111/brv.12239. hdl:10662/8091. ISSN 1469-185X. PMID 26588818. S2CID 39110115.

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[paleodib-1] Distribution age in the paleontology database

[2] Budd, Graham E.; Jensen, Sören (2017). "The origin of the animals and a 'Savannah' hypothesis for early bilaterian evolution". Biological Reviews. 92 (1): 446–473. doi:10.1111/brv.12239. hdl:10662/8091. ISSN 1469-185X. PMID 26588818. S2CID 39110115.

[1]

[2]

Description

Distribution

Gallery

See also

References