- siphuncle.
There are
occasions where trilobites have been
preserved within phragmocones,
presumably where they
crawled in for refuge. Henderson,
ROBERT A.; McNamara...
- one side of the
phragmocone is the thin pro-ostra****.
While belemnoid phragmocones are
homologous with the s**** of
other cephalopods and are similarly...
-
connective tissue. They had
calcite guards, and
aragonite pro-ostraca and
phragmocones,
though a few
belemnites also had
aragonite guards, and the alveolar...
- for spirula, they are the only
coleoid cephalopods with a s**** with a
phragmocone divided into
chambers separated by septa. The
pores provide it with buoyancy...
- by
their septa, the
dividing walls that
separate the
chambers in the
phragmocone, by the
nature of
their sutures where the
septa join the
outer s****...
-
Nanglu et al. (2023)
report the
discovery of an
orthocone cephalopod phragmocone from the
Ordovician Fezouata Formation (Morocco)
which was extensively...
- from the
siphuncle which extends through the rest of the
septa (the
phragmocone) to
provide buoyancy. "Definition of BODY WHORL". www.merriam-webster...
- to
other s****ed cephalopods,
although it does not have a
chambered phragmocone. Once
thought to
contribute to
occasional m****
strandings on beaches...
-
large external s****,
divided into a
narrowing chambered region (the
phragmocone) and a broad, open body
chamber occupied by the
animal in life. The outer...
- mantle.
Donovan (2006),
gives a
similar description for Phragmoteuthis:
Phragmocones as
having an
apical angle of
between 20 and 30 degrees, and relatively...
