-
central to
subcentral siphuncles which may bear
internal deposits.
Orthoceratoids are also
characterized by
dorsomyarian muscle scars (a
small number...
- Orthocerida, also
known as the Michelinocerida, is an
order of
extinct orthoceratoid cephalopods that
lived from the
Early Ordovician (490 million years...
-
cephalopods has been a four-fold
division (by Bather, 1888), into the
orthoceratoids, nautiloids, ammonoids, and coleoids. This
article is
about nautiloids...
- is
prevalent among the ellesmerocerids, endocerids, actinocerids,
orthoceratoids, and bactritids.
Orthocones existed from the Late
Cambrian to the Late...
-
Rangeroceras is an
extinct orthoceratoid cephalopod genus that
lived in what is now
western North America during the
latter part of the
Early Ordovician...
-
Lituitida is an
order of
orthoceratoid cephalopods. They
correspond to the
family Lituitidae of the
Treatise (Furnish & Glenister, 1964),
reranked as...
-
Dissidocerida is an
order of
Early Ordovician to the
Early Silurian orthoceratoid cephalopods in
which the
siphuncle has a
continuous lining or a longitudinal...
- The
Choanoceratidae is a small, mono-generic,
family of
extinct orthoceratoid cephalopods in the
order Orthocerida that
lived in what
would be Europe...
- Baltoceratidae, an
extinct cephalopod family with
characteristics of the
orthoceratoid Dissidocerida,
found in C****inianage,
Lower Ordovician,
limestone in...
-
Tienocerasis an
orthoceratoid genus from the
Permian of
China (Hunan).
Orthoceratoids are
slender conical or near cylindrical, orthoconic,
nautiloid cephalopods...
