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Harpoceratinae is an
extinct subfamily of
cephalopods belonging to the
family Hildoceratidae.
Ammonites of this
subfamily had
involute and
compressed s****...
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Paleontological Research, 2003, 7.3: 185-194. Marc BÉCAUD (2006) LES
HARPOCERATINAE,
HILDOCERATINAE ET
PARONICERATINAE DU
TOARCIEN DE LA VENDÉE ET DES DEUX-SÈVRES...
- †Ammonoidea Order: †Ammonitida Family: †Hildoceratidae Subfamily: †
Harpoceratinae Genus: †Tiltoniceras Buckman, 1913 Type
species Tiltoniceras costatum...
- †Ammonoidea Order: †Ammonitida Family: †Hildoceratidae Subfamily: †
Harpoceratinae Genus: †Ovaticeras Buckman, 1918 Type
species Ammonites ovatus Young...
- †Ammonoidea Order: †Ammonitida Family: †Hildoceratidae Subfamily: †
Harpoceratinae Genus: †Sphenarpites Spath, 1936 Type
species Sphenarpites hawkinsi...
- †Ammonoidea Order: †Ammonitida Family: †Hildoceratidae Subfamily: †
Harpoceratinae Genus: †Harpoceras
Waagen 1869 Type
species Ammonites falcifer Sowerby...
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OCCIDENTALE AU
COURS DU TOARCIEN. 2011. PhD Thesis. BÉCAUD, Marc. Les
Harpoceratinae,
Hildoceratinae et
Paroniceratinae du
Toarcien de la Vendée et des Deux-Sèvres...
-
similar to Pseudolioceras, but is more
evolute and
differs from
other Harpoceratinae by
having bifurcating ribs. M. K.
Howarth 2013.
Treatise on Invertebrate...
- they even
belong to
different subfamily, as
Lioceratoides belongs to
Harpoceratinae.
Their fossils were
found in
Europe and
northern Africa.
Ammonites belonging...
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island arc magmas.
Miembro Icalma do also
contains marine fossils of
Harpoceratinae and
Atacamiceras in its
sedimentary strata that
indicate a Pliensbachian...
