-
Sonniniidae is a
diverse family of
Middle Jur****ic
ammonites ranging from
those with
stout evolute s**** to
those whose s**** are
sharply rimmed, oxyconic...
- Planammatoceras, Pseudaptetoceras, and Puchenquia. Fissilobiceras,
included in the
Sonniniidae in the Treatise, 1957,
differs from
typical hammatoceratids in being...
-
Middle Jur****ic
ammonite and
likely member of the
Hildoceratacean family Sonniniidae with
which it
shares the same sort of ribbing.
Haplopleuoceras has a...
- from the
early Middle Jur****ic,
lower Bajocian,
belonging to the
family Sonniniidae of the
superfamily Hildoceratoidea. The
inner whorls are
ribbed or smooth...
- compressed, discoidal,
strongly keeled s****.
Asthenoceras belongs to the
Sonniniidae and may be a
subgenus of the
Lower Jur****ic (Upper Toarcian) Grammoceras...
- 1964 that
combined the
families Graphoceratidae, Hammatoceratidae, and
Sonniniidae. The
three families were
previously included in the Hildoceratoidea,...
- with the
Hammatoceratidae (= Phymatoceratidae), Graphoceratidae, and
Sonniniidae to make up the Hildoceratoidea. As many as
seven subfamilies have been...
- (early Bajocian), from
about 171.5 to 173.5 Ma.
Guhsania belongs to the
Sonniniidae, a
member of the
Hildoceratoidea superfamily. The s**** (conch): essentially...
-
median keel, and
tubercles are lacking.
Fontannesia is
included in the
Sonniniidae (Hildoceratoidea) and has been
found widespread in Europe,
western Australia...
-
Hammatoceratoidea which also
includes the Hammatoceratidae,
Graphoceratidae and
Sonniniidae removed from the Hildoceratoidea, left with only the
Hildoceratidae and...
