Nemataplexus

Nematoplexus
Scientific classification
Kingdom:	Plantae (?)
Phylum:	Nematophyta
Class:	†Nematophytina
Order:	†Nematophytales
Family:	†Nematothalaceae
Genus:	Nematoplexus Lyon 1962

Nematoplexus rhyniensis is a fossil known from the Rhynie chert assigned to the nematophytes. It comprises a loose mass of coily aseptate tubes. Tubes which may have originated from a Nematoplexus-like plant are known from earlier Silurian sediments.

...
Wikipedia