The Teudopseina is a clade of stem-octopods that first evolved in the Toarcian,[1] considered the largest clade of gladius-bearing coleoids in the Mesozoic.

These are the presence of a gladius, a reduced, spoon-shaped conus, a median field that is distinctly rounded or pointed anteriorly, weakly curved hyperbolar zones, and lateral fields shorter than the hyperbolar zones.

[2] Members of the superfamily Muensterelloidea are characterized by a spoon-shaped section of the gladius, known as the patella.

This is believed to be ancestral to the condition present in modern octopuses.

[3] The current consensus is that the Teudopseina forms a stem-group of the Octopoda.