-
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...
- is
prevalent among the ellesmerocerids, endocerids, actinocerids,
orthoceratoids, and bactritids.
Orthocones existed from the Late
Cambrian to the Late...
-
cephalopods has been a four-fold
division (by Bather, 1888), into the
orthoceratoids, nautiloids, ammonoids, and coleoids. This
article is
about nautiloids...
-
Lituitida is an
order of
orthoceratoid cephalopods. They
correspond to the
family Lituitidae of the
Treatise (Furnish & Glenister, 1964),
reranked as...
- Baltoceratidae, an
extinct cephalopod family with
characteristics of the
orthoceratoid Dissidocerida,
found in C****inianage,
Lower Ordovician,
limestone in...
- Endoceratoidea, Multiceratoidea, and Orthoceratoidea. The Ordovician-Tri****ic
Orthoceratoids are
ancestral to post-Paleozoic
groups such as
ammonoids (ammonites)...
-
Bactroceras is a
genus of
orthoceratoid cephalopods that
lived during the
early Middle Ordovician, from
about 472—464 mya,
existing for approximately...
-
Dissidocerida is an
order of
Early Ordovician to the
Early Silurian orthoceratoid cephalopods in
which the
siphuncle has a
continuous lining or a longitudinal...
-
Society 623:1-81 B. Kröger, M. S. Beresi, and E. Landing. 2007.
Early orthoceratoid cephalopods from the
Argentine Precordillera (Lower-Middle Ordovician)...
