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Horodyskia

Horodyskia
Temporal range: 1500 - 900 Ma
Horodyskia moniliformis.jpg
Horodyskia moniliformis, "string-of-beads fossil" from the 1.4 Ga Appekunny Argillite of Glacier National Park, Montana)
Scientific classification
Kingdom: Fungi
Phylum: Glomeromycota
Order: Archaeosporales
Family: Geosiphonaceae
Genus: Horodyskia
Species

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. It may also have had a series of holdfasts along the bottom of the thread.

Comparisons of different fossils in the same locations suggest that it re-arranged itself into fewer but larger main masses as the sediment grew deeper round its base.

Horodyskia has been considered an early metazoan, and a colonial foraminiferan. These alternatives are now considered less likely than a Geosiphon-like fungus (Glomeromycota, Archaeosporales).


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Wikipedia

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