- America,
where it is widespread.
Campbelloceras was
named by
Ulrich and
Foerste in 1936. The s**** of
Campbelloceras has a
circular whorl section, only...
-
intermediary as in Tarphyceras, or
subventral as in
Campbelloceras.
Cross sections vary.
Tarphyceras and
Campbelloceras are rounded.
Centrotarphyceras is subquadrate...
- and Estonioceras, are
loosely coiled and gyroconic; others, such as
Campbelloceras, Tarphyceras, and Trocholites, are
tightly coiled, but
evolute with...
- Tarphyceratidae;
Plectoceras with its
subventral siphuncle possibly from
Campbelloceras,
Barrandeoceras with its
subcentral siphuncle possibly from Centrotarphyceras...
- the
Lower Ord (U Canad) of
North America. It
differs from
Campbelloceras in that
Campbelloceras is only
slightly impressed, from
Centrotarphyceras in that...
-
therefore the Plectoceratidae, is
derived from the
Tarphyceratid genus Campbelloceras while Barrandeoceras, and
therefore the Barrandeoceratidae, is derived...
-
Lower Alaskoceras Moreauoceras Pilotoceras Shumardoceras Pycnoceras Campbelloceras Aphetoceras Upper Aethoceras Bentoceras Centrotarphyceras Clytoceras...
- †Calchasiceras †Calhounoceras †Callaionautilus †Calocyrtoceras †Cameroceras †
Campbelloceras †Campendoceras †Campyloceras †Capriocornites †Carbactinoceras †Carinonautilus...
-
suckowii †Callipteris –
tentative report †Callocladia †Camarotoechia †
Campbelloceras –
tentative report †Canadaspis †Canadaspis
perfecta – or unidentified...
-
litchfieldensis †Camarotoechia
neglecta †Camarotoechia
tethys †Cameroceras †
Campbelloceras †Caninia †Carcinosoma †Cardiograptus †Carniodus †Carolinites †Cartersoceras...
