Cloudinidae
Cloudinids (Cloudina) are an extinct animal phylum that formed small Late Proterozoic tubelike or conical fossils consisting of "cup-in cup" segments of calceraecous material.
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Cloudinids (Cloudina) are an extinct animal phylum that formed small Late Proterozoic tubelike or conical fossils consisting of "cup-in cup" segments of calceraecous material.