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Horodyskia information


Horodyskia
Temporal range: Middle Calymmian – Early Tonian 1500–900 Ma
Pha.
Proterozoic
Archean
Had.
Horodyskia moniliformis, "string-of-beads fossil" from the 1.4 Ga Appekunny Argillite of Glacier National Park, Montana[1]
Scientific classification
Domain:
Eukaryota
Genus:
Horodyskia
Species
  • H. moniliformis Yochelson & Fedonkin, 2000
  • H. minor Dong, Xiao, Shen & Zhou, 2008
  • H. williamsii Grey, Yochelson, Fedonkin & Martin, 2010.

Horodyskia is a fossilised organism found in rocks dated from 1,500 million years ago to 900 million years ago. Its shape has been described as a "string of beads" connected by a very fine thread.[2] It is considered one of the oldest known eukaryotes.

Horodyskia apparently re-arranged itself into fewer but larger main masses as the sediment grew deeper round its base.[2]
The bead structures of Horodyskia vary in shape.[1]
  1. ^ a b Retallack, G.J.; Dunn, K.L. & Saxby, J. (2013). "Problematic Mesoproterozoic fossil Horodyskia from Glacier National Park, Montana, USA". Precambrian Research. 226: 125–142. Bibcode:2013PreR..226..125R. doi:10.1016/j.precamres.2012.12.005.
  2. ^ a b Fedonkin, M.A. (March 2003). "The origin of the Metazoa in the light of the Proterozoic fossil record" (PDF). Paleontological Research. 7 (1): 9–41. doi:10.2517/prpsj.7.9. S2CID 55178329. Archived from the original (PDF) on 2006-05-18. Retrieved 2008-09-02.

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Horodyskia

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Horodyskia is a fossilised organism found in rocks dated from 1,500 million years ago to 900 million years ago. Its shape has been described as a "string...

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