-
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...
- planation, plane, planification, planiform, planish, planula, planular,
planulate plang-, planct- strike, beat; lament,
mourn Latin plangere,
planctus plangent...
-
transiens Frentzen, 1937
Pleuroceras apyrenum Buckman, 1911
Pleuroceras has a
planulate s**** with a
quadrate whorl section,
bearing strong radial ribs ending...
- rose color. it
contains 9 whorls, the
embryonic smooth, the
following planulate. The s**** is
sculptured with
spiral series of
regular beads the remaining...
- has a depressed-conic shape. It is pale yellowish. The six
whorls are
planulate above, and
obliquely tuberculate-plicate. The
periphery is expanded, compressed...
- planation, plane, planification, planiform, planish, planula, planular,
planulate plang-, planct- strike, beat; lament,
mourn Latin plangere,
planctus plangent...
-
Megalytoceratinae is a
subfamily of
lytoceratids ammonites consisting of
planulate forms, i.e.
those with
moderately evolute compressed s**** with bluntly...
-
characterized by s**** that
begin as barrel-shaped
cadicones but
which become planulate later in life. Body
chambers are
reduced in size and are excentric. Similar...
- Hildoceratoidea,
formerly Hildoceratacaea, is a
superfamily of
compressed or
planulate ammonites, some
tending to
develop acute outer rims;
generally with arcuate...
-
subgen of Erymnoceras. (U Callov) Rollierites: evolute, more or less
planulate; ribs co****,
branching from
tubercles at
umbilical edge. (M Callov)....
