- with one exception, as
genus Badouxia had weak
ventral chevron. S**** is
planulate, or serpenticone.
Sutures were
often asymmetrical and in some genera,...
- planation, plane, planification, planiform, planish, planula, planular,
planulate plang-, planct- strike, beat; lament,
mourn Latin plangere,
planctus plangent...
-
diameter of
about 45–54
millimetres (1.8–2.1 in).These
ammonites have a
planulate s**** with a
quadrate whorl section,
bearing strong radial ribs ending...
-
spire is
strictly conical. The apex is eroded. The
about 7
whorls are
planulate above, the last
acutely angular at the periphery. The
whorls are smooth...
-
transiens Frentzen, 1937
Pleuroceras apyrenum Buckman, 1911
Pleuroceras has a
planulate s**** with a
quadrate whorl section,
bearing strong radial ribs ending...
- planation, plane, planification, planiform, planish, planula, planular,
planulate plang-, planct- strike, beat; lament,
mourn Latin plangere,
planctus plangent...
- Hildoceratoidea,
formerly Hildoceratacaea, is a
superfamily of
compressed or
planulate ammonites, some
tending to
develop acute outer rims;
generally with arcuate...
-
Megalytoceratinae is a
subfamily of
lytoceratids ammonites consisting of
planulate forms, i.e.
those with
moderately evolute compressed s**** with bluntly...
-
Stephanoceratidae is a
family of
planulate and
coronate ammonites within the Stephanoceratoidea. S**** are
evolute so that all
whorls are
exposed and...
- is acute,
generally eroded and orange-colored. The
about 7
whorls are
planulate,
sometimes a
little concave in the middle. The body
whorl has a sharply...
