Cephalopoda

Estonioceras Noetling, 1883

Selection of related publications
Stumbur, H. A. 1960. On different ways of evolution of nautiloids. Proc. of the Academy of Sciences of the Estonian SSR. Ser. Tech. and Phys.-Mat. Sciences 9, 4, 368-378.
Stumbur, H. A. 1959. On the embryonic shells of some Ordovician Tarphyceratida. Paleontologicheski Zhurnal , 2, 25-29.
Balashov, Z. G. 1953. Coiled and half-coiled nautiloids from the Ordovician of Baltics. Stratigraphy and fauna of the Ordovician and Silurian West Russian Platform, pp. 217-300.