| Conchicolites, Tentaculites, Microconchida, Tentaculita, Anticalyptraea|Cornulites Wikipedia
Cornulites is a genus of cornulitid tubeworms. Their shells have vesicular wall structure, and are both externally and internally annulated. They usually occur as encrusters on various shelly fossils. Their fossils are known from the Middle Ordovician to the Carboniferous.