- The
Oncocerida comprise a
diverse group of
generally small nautiloid cephalopods known from the
Middle Ordovician to the
Mississippian (early Carboniferous;...
-
somewhat variable between authors, but it
usually includes Tarphycerida,
Oncocerida, and Nautilida. All
nautiloids have a
large external s****,
divided into...
-
Pseudorthocerida (432 to 272 Ma)
Order †
Tarphycerida (485 to 386 Ma)
Order †
Oncocerida (478.5 to 324 Ma)
Order Nautilida (extant; 410.5 Ma to present) Order...
- the
ancestral Ellesmerocerida and the more
advanced Tarphycerida and
Oncocerida. The order, as
originally defined,
contains two families, the B****leroceratidae...
- 2013,
Multiceratoidea included four
nautiloid orders: Ellesmerocerida,
Oncocerida, Discosorida, and Ascocerida. The
order Tarphycerida was
considered a...
-
resulting in large, long camarae. In
others such as the Ellesmerocerida,
Oncocerida and
Discosorida the
septa are
crowded closely together. In some straight-s****ed...
-
early schemes. Both
Shimansky and
Kummel derive the
Nautilida from the
Oncocerida with
either the
Acleistoceratidae or
Brevicoceratidae (Teichert 1988)...
-
Aletoceras is a
genus of
Oncocerida nautiloids from the
middle Devonian of
North America included in the
family Brevicoceratidae. The s**** is a depressed...
-
Megaloceras is a
genus of the
nautiloid order Oncocerida that
lived during the
Silurian period of the Paleozoic. It is
included in the
family Karoceratidae...
-
Ellesmerocerida Orthocones: Endocerida, Orthocerida,
Actinocerida Brevicones: Ascocerida,
Oncocerida Earliest coiled cephalopods:
Tarphycerida Spirulid?: Shimanskya...
