-
which bifurcates upwardly from
about the middle. The
genus Najaceras is
based on
Najaceras triangulatum (Flower, 1971)
which comes from the Oil Cr****...
- (Flower, 1955) but
later (Flower, 1976)
placed with its predecessor,
Najaceras, in the Najaceratidae. The
siphuncle in
Mensicoceras is
large with short...
-
cross section. In this
sense Allocotoceras seems to
resemble the
genus Najaceras.
Allocotoceras at Fossilworks.org Corbett, K. D.; Banks, M. R. (1973)...
- †Murchisoniceras †Muriceras †Murrayoceras †Myloceras †Mysterioceras †Naedyceras †
Najaceras †Nanno †N****auoceras †Nautiloceras †Nebroceras †Neobistrialites †Neoceras...
-
Chihlioceras Cyclocyrtendoceras Cyptendoceras Kirkoceras Lobendoceras Najaceras Protocyclendoceras Yehlioceras Nanno Dideroceras Lobocyclendoceras Meniscoceras...
- tentative. Some endocerids,
derived from the Proterocameroceratidae,
Najaceras, Cacheoceras, and Williamsoceras, have a
longitudinal dorsal or ventral...
