Tietea was a genus of marattialean tree ferns from the Late Carboniferous to the Permian.

Tietea singularis stems usually are less than 20 centimetres (7.9 in) in diameter, bearing four orthostichies of leaves in a decussate arrangement.

[4] T. singularis stem transverse sections have the same basic structure as Psaronius, but are composed of central vascular bundles having smaller, O- and C-shaped forms, or wavy segments having a short, rounded or fat configuration.

Much of the recovered wood material from this formation is of the tree ferns Psaronius and T. singularis, with fewer examples of the fossilized stems being of Calamites.

Tietea singularis is also seen abundantly in the Motuca Formation, Parnaíba Basin in Filadélfia, Tocantins.