This file is from Wikimedia Commons and may be used by other projects.
The description on its file description page there is shown below.
Summary
DescriptionConulariid 2.jpg
English: Conulariids are an uncommon to rare, extinct group of fossil organisms known from the Cambrian to the Triassic. They are most common in Mississippian sedimentary rocks. Their form is best described as "four-sided ice cream cones with ridges". They have a four-sided, tapering skeleton having tetrameral radial symmetry. The skeleton is somewhat flexible, often has a brownish color, and is composed of chitionphosphate (a mixture of chitin and calcium phosphate). Some paleontologists conclude it is an extinct group of cnidarians, or even a group of scyphozoan cnidarians. Others refer to conulariids as an extinct phylum. Available evidence indicates they are triploblastic, and so are not cnidarians at all, which are diploblastic.
Very rare soft-part preservation shows the presence of an alimentary canal, with the pointed end of the skeleton oriented downward and attached to a sheath.
Classification: Animalia incertae sedis, Conulata, Conulariida
to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
https://creativecommons.org/licenses/by/2.0CC BY 2.0 Creative Commons Attribution 2.0 truetrue