- The
siphuncle is a
strand of
tissue p****ing
longitudinally through the s**** of a
cephalopod mollusc. Only
cephalopods with
chambered s**** have siphuncles...
- said to be
evolute (e.g., Dactylioceras). A thin
living tube
called a
siphuncle p****ed
through the septa,
extending from the ammonite's body into the...
- the
genus Nanno in that the
siphuncle in
Nanno fills the
entire apical portion of the s****
while in
Endoceras the
siphuncle is
ventral even
there with...
- sections,
straight to
sinuous sutures, and a tubular,
generally central siphuncle.
Having survived relatively unchanged for
hundreds of
millions of years...
-
release of egg and sperm, in the
nautilus a
string of
tissue called the
siphuncle goes
through all the chambers, and the
eight plates that make up the s****...
- body
chamber transversely constricted, and a
subcentral orthochoanitic siphuncle. The
surface is
ornamented by a
network of fine
lirae (Sweet 1964:K224)...
- cephalopods. It had a
chambered conical s****, but
lacked a
siphuncle. The
absence of a
siphuncle in K. antarcticus has been
taken as
evidence against its...
-
cephalopods from the
Lower Paleozoic with cone-like
deposits in
their siphuncle.
Endocerida was a
diverse group of
cephalopods that
lived from the Early...
- (straight) to
slightly cyrtoconic (curved) s****, and
central to
subcentral siphuncles which may bear
internal deposits.
Orthoceratoids are also characterized...
-
perforated by the
siphuncle, a
fleshy tube
which runs
through each of the
internal chambers of the s****.
Surrounding the
fleshy tube of the
siphuncle are structures...
