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Temporal range: Silurian[1]
Septalites septatus.jpg
Septalites septatus from the Silurian of Gotland.
Scientific classification
Kingdom: Animalia
Phylum: incertae sedis
Class: Tentaculita
Order: Cornulitida
Family: Cornulitidae
Genus: Septalites
Vinn, 2005
Septalites septatus longitudinal section of the tube showing septa. Silurian of Gotland

Septalites is a genus of cornulitid tubeworms. Their shells lack vesicular wall structure and have a smooth lumen filled with numerous transverse septa. They are externally covered with transverse ridges. Their fossils are known only from the Silurian of Gotland.[1]