- The
Actinocerida are an
order of
generally straight,
medium to
large cephalopods that
lived during the
early and
middle Paleozoic,
distinguished by a siphuncle...
- †
Actinocerida †Discosoritoidea = †Discosorida
Three of
these superorders were
established for
orders of
uncertain placement: Endocerida,
Actinocerida,...
-
Ellesmerocerida (500 to 470 Ma)
Order †
Endocerida (485 to 430 Ma)
Order †
Actinocerida (480 to 312 Ma)
Order †
Discosorida (482 to 392 Ma)
Order † Pseudorthocerida...
- Currently,
Orthoceratoidea comprises the
orders Riocerida, Dissidocerida,
Actinocerida, Pseudorthocerida,
Lituitida and Orthocerida.
Orthocerida is a noteworthy...
-
unlike orthoceratoid cephalopod orders such as the
Orthocerida and
Actinocerida.
Endocerids reached enormous body sizes. The
largest confirmed specimen...
-
cephalopod group Ellesmerocerida Orthocones: Endocerida, Orthocerida,
Actinocerida Brevicones: Ascocerida,
Oncocerida Earliest coiled cephalopods: Tarphycerida...
- (2016-04-02). "Siphuncular
structures in
Calciosiphonate nautiloid orders Actinocerida,
Orthocerida and
Barrandeocerida (Cephalopoda)". GFF. 138 (2): 295–305...
-
cephalopod group Ellesmerocerida Orthocones: Endocerida, Orthocerida,
Actinocerida Brevicones: Ascocerida,
Oncocerida Earliest coiled cephalopods: Tarphycerida...
-
cephalopod group Ellesmerocerida Orthocones: Endocerida, Orthocerida,
Actinocerida Brevicones: Ascocerida,
Oncocerida Earliest coiled cephalopods: Tarphycerida...
-
cephalopod group Ellesmerocerida Orthocones: Endocerida, Orthocerida,
Actinocerida Brevicones: Ascocerida,
Oncocerida Earliest coiled cephalopods: Tarphycerida...
