- ancestor-descendant relationships, this is not the case for
nautiloids. Instead,
nautiloids are a
paraphyletic grade of
various early-diverging cephalopod...
- genus' use as a
wastebasket taxon for
numerous species of conical-s****ed
nautiloids throughout the
Paleozoic and Tri****ic.
Since this work was
carried out...
- found. The
septal curvature in
nautiloids and
ammonoids also
differ in that the
septa curves towards the
opening in
nautiloids, and away from the opening...
-
genera and
families of
nautiloids developed or
retained this form of s****. An orthocone, loosely, may be
thought of as a
nautiloid s****,
albeit somewhat...
- This list of
nautiloids is a
comprehensive listing of all
genera that have ever been
included in the
subclass Nautiloidea,
excluding purely vernacular...
- The Saint-Chinian
Formation is a
geological formation composed of
shales with
limestone inclusions,
dating from the
Lower Ordovician (Tremadocian). It...
- or
absence of deposits, are
important in
classification of
nautiloids. In some
nautiloids, such as the Orthoceratidae, the
septa tend to be
widely spaced...
-
these claims are problematic. The
overwhelming majority of
endocerids and
nautiloids in
general are much smaller,
usually less than a
meter long when fully...
-
became dominant during the
Ordovician period,
represented by
primitive nautiloids. The
class now
contains two, only
distantly related,
extant subclasses:...
-
descending from
bactritoid nautiloids.
Ammonoids during this time
period were
simple and
differed little from
their nautiloid counterparts.
These ammonoids...
