- The
Uranoceratidae is a
family of
Silurian barrandeoceroids that tend to
become uncoiled with age and in
which siphuncle segments tend to be
expanded into...
- annulate,
lituiconic nautiloid included in the
derived Tarphycerid family,
Uranoceratidae. The s**** is
gyroconic in the
early stage,
becoming straight and more...
-
consisting of the Barrandeoceratidae, Bickmoritidae, Nephriticeratidae, and
Uranoceratidae; and the
plectoceratid group,
derived from Campbelloceras, consisting...
-
Barrandeoceratidae M Ord-M Dev
Plectoceratidae M-U Ord
Apsidoceratidae M-U Ord
Uranoceratidae U Ord-M Sil
Lechritrochoceratidae M-U Sil
Nephriticeratidae L-M Dev...
-
Centrotarphyceras through Barrandeoceras (Flower 1984), and is the
source for the
Uranoceratidae and Nephriticeratidae.
These three families form the barrandeoceratid...
-
Cliftonoceras is a
genus of
barrandeoceroid type
tarphycerids from the
Uranoceratidae characterized by a
smooth gyroconic s**** with a
rounded dorsum and...
- of
barrandeoceroids within the Tarphycerida,
included in the
family Uranoceratidae. Its s**** is a
rapidly expanding gyrocone of
about 1.5
narrowly separated...
- Kröger Late
Ordovician (late Katian) Boda
Limestone Sweden A
member of
Uranoceratidae. The type
species is
Siljanoceras varians.
Simobelus compactus Sp. nov...
-
barrandeocerid genus from the
Middle Silurian belonging to the
family Uranoceratidae,
characterized by its
loosely coiled,
gyroconic s**** of 1.5 to 2 subquadrate...
