Eohostimella

Eohostimella heathana is an early, probably terrestrial, "plant" known from compression fossils^[2] of Early Silurian age (Llandovery, around 440 to 430 million years ago^[3]). The chemistry of its fossils is similar to that of fossilised vascular plants, rather than algae.^[2] Its anatomy constitutes upright, cylindrical tubes,^[2] with a thickened outer cortex,^[4] which might have contained traces of lignin or a similar compound,^[2] even though no tracheids or similar vessels have been found;^[4] the lignin-like compound was presumably associated with its thick outer cortex.^[5] It branched dichotomously and might have borne small spines.^[6] It was probably affiliated with the rhyniophytes.^[4]

Eohostimella Temporal range: Llandovery PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Stem group:	†Rhyniophytes (?)
Genus:	†Eohostimella J.M.Schopf (1966)[1]
Species:	†E. heathana
Binomial name
†Eohostimella heathana J.M.Schopf (1966)[1]