Proterocladus
''Proterocladus'' is a genus of green algae from the early Neoproterozoic (Tonian) and latest Mesoproterozoic (Stenian), known from the Nanfen Formation and Diaoyutai Formation in China and the Svanbergfjellet Formation in Norway. Alongside this, possible ''Proterocladus'' remains are known from the Nonesuch Formation, although their fragmentary state makes it unclear whether they belong to the genus. Description The later three species (''major'', ''minor'', ''hermannae'') are relatively similar, only being differentiated by size and accessory features. All these species have filaments composed of rows of single cells with occasional branches, with the individual cells being cylindrical, wikt:psilate, psilate (lacking ornamentation) and thin-walled, varying in length but much longer than wide. These cells often have septa (partitions) separating them, and the occasional branches often occur near a septum. The tips of the filaments are either rounded or capitate (ending in a br ...
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Svanbergfjellet Formation
The Svanbergfjellet Formation is a Formation (geology), geologic formation in Svalbard. It preserves eukaryotic fossils dating back to the Late Tonian Period (geology), period, around 790 Ma. Paleobiota After Butterfield et al, 1994. References

{{reflist Geologic formations of Norway Tonian Neoproterozoic geology ...
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