-
involute ammonoids on the serpenticone-spherocone
spectrum are
termed Cadicones.
Ammonites vary
greatly in the
ornamentation (surface relief) of their...
-
ribbed rounded whorls. The s**** is evolute,
early whorls a barrel-shaped
cadicone,
later become serpenticonic. Jur****ic of France,
Germany and
Spain Notes...
- the
stephanoceratacean family, Macrocephalitidae.
Inner whorls form a
cadicone (a
barrel shape),
outer become more
compressed and smoother. Ribs are simple...
- fine
ribbing that
includes may secondaries. It
begins as a
barrel shaped cadicone, with an eccentric, more or less
smooth body chamber.
Emileia is included...
- Otoitidae,
which are
characterized by s**** that
begin as barrel-shaped
cadicones but
which become planulate later in life. Body
chambers are
reduced in...
-
stephanoceratoid ammonitina from the
early Middle Jur****ic that
begin as
cadicones but
become more
planualte with age;
derived from the Hammitoceratidae...
-
America and
South America. Form of
their s****
could range from
depressed cadicone to
compressed ellipsocone.
Whorl section is
quadrangular and has flat sides...
-
belonging to this
genus have
evolute s**** of
small size.
Inner whorls are
cadicone,
while outer whorls are subquadrate. On
younger whorls, ribs are widely...
-
north Africa. S**** of
ammonites belonging to this
genera had
evolute cadicone whorls with
depressed section.
Venter has been flat. Ribs were usually...
-
belonging to this
genus have
small to medium-sized s****.
Coiling is
cadicone to
moderately evolute.
Subcircular whorl section has
convex flanks and...
