-
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...
- Pina-Barracas.2 Sarrión.1 Sarrión.2
Isolated s**** An
Ammonite of the
family Sonniniidae Epalxites E. spp. Pina-Barracas.1
Isolated s**** An
Ammonite of the...
- with the
Hammatoceratidae (= Phymatoceratidae), Graphoceratidae, and
Sonniniidae to make up the Hildoceratoidea. As many as
seven subfamilies have been...
- 1964 that
combined the
families Graphoceratidae, Hammatoceratidae, and
Sonniniidae. The
three families were
previously included in the Hildoceratoidea,...
- compressed, discoidal,
strongly keeled s****.
Asthenoceras belongs to the
Sonniniidae and may be a
subgenus of the
Lower Jur****ic (Upper Toarcian) Grammoceras...
- that
unites the Hildoceratidae, Hammatoceratidae, Graphoceratidae, and
Sonniniidae. In some
taxonomies the name
Phymatoceratidae is
substituted for the...
- from the
early Middle Jur****ic,
lower Bajocian,
belonging to the
family Sonniniidae of the
superfamily Hildoceratoidea. The
inner whorls are
ribbed or smooth...
-
analysis of his
observations on
Sonninia (a
genus of
ammonite in
family Sonniniidae)
reduced 70
species down to two. His
splitting has been
called "extreme"...
