- were
thought to use two of
their arms as sails. The arm
crown of
modern nautilids (genera
Nautilus and Allonautilus) is very
distinct in
comparison to coleoids...
- For the rest,
nautilids adapted the
standard planispiral s**** form,
although not all were as
tightly coiled as the
modern nautilids (Teichert 1988)...
- Naticopsis.
Nautiloid cephalopods are
represented by
tightly coiled nautilids, with straight-s****ed and curved-s****ed
forms becoming increasingly...
-
swallowed whole, so the
mouth cavity must be larger.
Externally s****ed
nautilids (Nautilus and Allonautilus) have on the
order of 90 finger-like appendages...
-
Strionautilus is an
extinct nautilid cephalopod.
Fossils are
found in Late
Cretaceous marine strata of
Russia and India.
Paleobiology Database v t e...
-
Aturia is an
extinct genus of
Paleocene to
Miocene nautilids within Aturiidae, a
monotypic family,
established by
Campman in 1857 for
Aturia Bronn, 1838...
-
Carinonautilus is a
genus of extinct,
Middle Cretaceous nautilid with a very involute,
compressed s**** in
which the
whorl section is
higher than wide...
-
coeloids (modern
cephalopods without external s****). The
origin of
modern nautilids is less certain,
though they may be
descended from
coiled multiceratoids...
-
survived into the
early Mesozoic,
including pseudorthocerids, bactritids,
nautilids and
possibly orthocerids. The last straight-s****ed
forms were long thought...
-
branch from the
family Nautilidae. Pseudonautilids,
together with
other nautilids, were
contemporary with the ammonoids,
which comprise an
entirely different...
