- ancestor-descendant relationships, this is not the case for
nautiloids. Instead,
nautiloids are a
paraphyletic grade of
various early-diverging cephalopod...
- 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...
- This list of
nautiloids is a
comprehensive listing of all
genera that have ever been
included in the
subclass Nautiloidea,
excluding purely vernacular...
- 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...
-
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...
-
these claims are problematic. The
overwhelming majority of
endocerids and
nautiloids in
general are much smaller,
usually less than a
meter long when fully...
-
these deposits are very
useful in
nautiloid classification. Flower, R. H. (1955). "Cameral
deposits in
orthoconic nautiloids".
Geological Magazine. 92 (2):...
- The Saint-Chinian
Formation is a
geological formation composed of
shales with
limestone inclusions,
dating from the
Lower Ordovician (Tremadocian). It...
- the s**** of a cephalopod. It is
divided by
septa into camerae. In most
nautiloids and ammonoids, the
phragmocone is a long, straight, curved, or coiled...
-
became dominant during the
Ordovician period,
represented by
primitive nautiloids. The
class now
contains two, only
distantly related,
extant subclasses:...
