doriprismatids

Doriprismatids are a family of extinct marine invertebrates belonging to the order Cornulitida. These organisms lived during the Paleozoic Era, with fossil evidence primarily found in Ordovician and Silurian rock formations. They are characterized by their distinctive conical, calcareous shells, which are often ribbed or ornamented. The shell structure of doriprismatids is generally uniserial, meaning it grows in a single row. These creatures were likely sessile, attaching themselves to hard substrates on the seafloor. Their feeding strategy is thought to have been suspension feeding, filtering small particles from the water column. The exact classification and relationships of doriprismatids within the broader group of Cornulitida are still subjects of ongoing paleontological research. Their presence in the fossil record provides insights into the marine ecosystems of the early Paleozoic.