-
Monocyrtoceras is a
genus of
armenoceratids (Cephalopoda) from the
Middle Silurian of
North America (Wisconsin), with a
gently curved s**** and a siphuncle...
- Selkirkoceras, respectively, from the
upper Middle and
Upper Ordovician, and
Monocyrtoceras, Elrodoceras, and
Megadiscoceras from the Silurian, The Armenoceratidae...
- †Mixosiphonoceras †Mjandymoceras †Mnemoceras †Mojscaroceras †Mongoceras †
Monocyrtoceras †Monogonoceras †Monomuchites †Montyoceras †Mooreoceras †Moreauoceras...
-
Upper Ordovician.
Possible Silurian derivatives include Megadiscosorus,
Monocyrtoceras, and
Elrodoceras although some may turn our to have
Nybyoceras as the...
-
branches of the
Armenoceratidae that also
includes Armenoceras and
Monocyrtoceras. Curt Teichert, 1964. Actinoceratoidea,
Treatise on
Invertebrate Paleontology...
