-
Oncoceratidae is a
family of
nauatiloid cephalopods in the
order Oncocerida established by Hyatt, 1884, that
range from the
Middle Ordovician to the Upper...
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Slender Oncoceratidae are
those in the
family Oncoceratidae, (Nautiloidea, Oncocerida)
which have slender,
commonly curved, s****. Some like Oocerina...
- the
order consists of some 16 families, a few of which, such as the
Oncoceratidae, Brevicoceratidae, and
Acleistoceratidae contain a fair
number of genera...
- Oocerina,
included in the
oncoerid family Oncoceratidae and
arbitrarily within the
Slender Oncoceratidae, is
characterized by a
moderately slender, elongate...
- interiors. The
Hemiphragmoceratidae are
probably descended from the
Oncoceratidae and are
known from the
middle and
upper Silurian but may
range into...
- 1964). The
Tripteroceratidae appeared almost simultaneously with the
Oncoceratidae and
Valcouroceratidae early in the
Middle Ordovician, and are most likely...
- small, ventral.
Maelonoceras is
nautiloid cephalopod included in the
Oncoceratidae along with such
genera as Oncoceras, Belotoceras, Digenuoceras, and...
-
transverse sections. The
Brevicoceratidae are
derived from
Oonoceras (
Oncoceratidae) and
range from the mid-Silurian to the
Upper Devonian. Brevicoceratidae...
- a
handful of species. Zittleoceras,
which is
included in the
family Oncoceratidae, is
characterized by
subcircular or
slightly depressed cyrtoconic s****...
-
Polyelasmoceratidae and is
possibly derived from
either Oonoceras or
Oocerina of the
Oncoceratidae based on
similarities of the
siphuncle Walter C. Sweet, 1964. Nautiloidea...
