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Haploceratoidea,
formerly Haplocerataceae, is an
extinct superfamily of
ammonoid cephalopods belonging to the
Ammonitida that
unites three families, Strigoceratidae...
- the Stephanoceratoidea, Perisphinctoidea, and
Haploceratoidea; the
Perisphinctoidea and
Haploceratoidea continued well into the Cretaceous. Exclusively...
- family, Polyorphitidae. The Stephanoceratoidea, Perisphinctoidea, and
Haploceratoidea have
their source in the
Hammatoceratidae which is
derived from the...
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Neolissoceras is a
genus of
haploceratid ammonites with a smooth, compressed, flat-sided s**** with a
flatly rounded venter and
distinct umbilical margin...
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Cadomoceras is an
extinct cephalopod genus from the
order Ammonitida that
lived during the
Bajocian Stage of the
Middle Jur****ic,
approximately 178 to...
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Oppeliidae are
compressed to oxyconic,
sculptured Haploceratoidea,
either unkeeled, unicarinate, bicarinate, or tricarinate; with
sutures in
great variety...
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Hecticoceras is an
ammonite genus belonging to the
haploceratoid family Oppeliidae, that
lived during the
Middle and Late Jur****ic, from the Callovian...
-
Brambilla (2019). "Pseudosonninia, a new
genus of
oppeliid ammonite (
Haploceratoidea) from the
Callovian (Middle Jur****ic) of the Neuquén Basin, Argentina"...
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Aconeceras is an
early Cretaceous ammonite included in the
oppeliid subfamily Aconeceratidae,
characterized by an involute, high-whorled, flat-sided s****...
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Lissoceras is an involute,
smooth or
finely vetrolaterally ribbed,
ammonite with a blunt, un-keeled venter,
included in the Haploceratidae, that lived...
