A new cornulitid genus from the Silurian of Gotland, Sweden

Abstract

A new genus and species Septalites septatus gen. et sp.n. of a possible cornulitid is described from the Silurian of Gotland. The new genus resembles Conchicolites in having a smooth tube interior with multiple septa, but differs in the greater number of septa and microlamellar tube structure. Most of the shell interior (about 3/4) is filled with the septa. S. septatus shares several features with Cornulites and tentaculitids, but it differs in lacking pseudopuncta and an annulated tube interior. It is affiliatiated with the Class Tentaculita Bouãek (1964) because of micro-lamellar tube structure and the presence of septa.

Keywords:

• Problematic fossils
• Tentaculita
• cornulitids
• Septalites gen. n
• ultrastructure
• Silurian
• Gotland