African conularia

Conularians are Medusozoic cnidarians.
Cnidarians are characterized by the presence of tentacles, radial symmetry and two structural types: polyp phase (fixed) and medusa phase (free).
The conularians are an extinct Paleozoic group, which lived from the late Ediacara to the Triassic. They have a pointed conical shell, with a square section, the external surface has fine grooves, both longitudinal and transverse. Most of the conularias were fixed to the bottom by the sharpest end and the upper end, open, is the mouth that was surrounded by a crown of tentacles.