- 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...
-
subclass Ammonoidea. The
chambered part of the
ammonite s**** is
called a
phragmocone. It
contains a
series of
progressively larger chambers,
called camerae...
-
deposits in the
phragmocones of
Belemnotheutis in 1952 made it
clear that they were
capable of
controlling buoyancy. The
phragmocone of Belemnotheutis...
- mantle.
Donovan (2006),
gives a
similar description for Phragmoteuthis:
Phragmocones as
having an
apical angle of
between 20 and 30 degrees, and relatively...
- 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...
-
Spirula s****
Ventral view; the
siphuncle and the last
septum of the
phragmocone are
visible Swedish botanist Carl
Linnaeus described Nautilus spirula...
- are the
spaces or
chambers enclosed between two
adjacent septa in the
phragmocone of a
nautiloid or
ammonoid cephalopod molluscus.
These can be seen in...
-
divides into
camerae (chambers), the
chambered section being called the
phragmocone. The
divisions are
defined by septa, each of
which is
pierced in the...
