-
Tetrameroceras is a
genus of short,
essentially straight, breviconic,
nautiloid cephalopods from the
middle and
Upper Silurian of
Europe and
North America...
- described; Hemiphragmoceras, Conradoceras, Hexameroceras, Octamerella, and
Tetrameroceras. Sweet, W. C. 1964; Nautiloidea-Oncocerida, in the
Treatise on Invertebrate...
- Wisconsin, and in
Europe in the
Czech Republic.
Hexameroceras is
similar to
Tetrameroceras but has 3
pairs of
dorsolateral sinuses (lateral
embayments in the aperture)...
- †Teichertia †Teichertoceras †Temnocheilus †Temperoceras †Tetragonoceras †
Tetrameroceras †Tetranodoceras †Tetrapleuroceras †Thaymastoceras †Therioceras †Theskeloceras...
- †Tentaculites
gyracanthus †Tentaculites
minutus †Tetracystis †
Tetrameroceras †
Tetrameroceras ****berlandi**** †Thlipsura †Thlipsura
ultimata †Thlipsurella...
- spout-like
process and a
larger rounded dorsal sinus connetected above.
Tetrameroceras and Trimeroceras, both oncocerids, are
similar in
general form, but...
-
mackenzicus †Spirifer
vanuxemi †Stigmaria †Tentaculites †Tetracystis †
Tetrameroceras †Trimerus †Waeringopterus †Wilkingia †Wurmiella †Wurmiella excavata...
