Cephalopoda

Proterocameroceratidae Hyatt, 1884

Selection of related publications
Kröger, B. 2012. The “Vaginaten”: the dominant cephalopods of the Baltoscandian Mid Ordovician endocerid limestone. GFF 134, 2, 115-132. DOI:10.1080/11035897.2012.691897
Mutvei, H. 1997. Siphuncular structure in Ordovician endocerid cephalopods. Acta Palaeontologica Polonica 42, 3, 375-390.
Balashov, Z. G. 1968. Ordovician Endoceratids from Soviet Union.