-
Paratornoceratinae is a
subfamily of
oxyconic dimeroceratids included in the
order Goniatitida, a
group of
Paleozoic ammonoids,
which have
closer affinity...
-
Acrimeroceras is an
oxyconic Devonian goniatite and one of
three genera included in the
subfamily Paratornoceratinae. The
others being Paratornoceras and...
-
Alcidellus is an
oxyconic (sharp ventered)
haploceratacean ammonite from the
Middle Jur****ic.
Alcidellus was
named as a
genus buy Gerd
Westermann in 1958...
- to the Perisphinctidae. The s**** is
strongly embracing,
tending to be
oxyconic (sharp rimmed).
Sides are
gently curved,
converging on a
narrow to sharp...
-
somewhat strongly involute and
greatly compressed s**** with a sharp,
oxyconic, venter.
Beatites was
first found in
Albania and is ****igned to the ceratatiid...
- Jur****ic,
included in the Strigoceratidae, Haploceratoidea. The s**** is
oxyconic, with a
sharp rim but no keel, and involute, with the
inner whorls hidden...
- three.
These are Amaltheus, Amauroceras, and Pleuroceras.
Amaltheus is
oxyconic, keeled, strigated, and
ribbed on the
outer flanks.
Amauroceras is smooth...
-
essentially involute and
ribbed throughout,
umbilical edge sharp,
outer whorl oxyconic. Sepkoski, Jack (2002). "A
compendium of
fossil marine animal genera (Cephalopoda...
-
Amaltheus is an
oxyconic ammonite with a
fairly open umbilicus,
serrated keel, and
slightly sigmoidal ribs from the
Lower Jur****ic, many of
which are strigate...
-
those with
stout evolute s**** to
those whose s**** are
sharply rimmed,
oxyconic. The keel,
which runs
along the
middle of the venter, is
typically hollow...
