Lower Pliensbachian ammonites


Faune

Dactylioceratidae

Couples

Eoderoceratidae

Liparoceratidae

Oxynoticeratidae

Juraphyllitidae

Lytoceratidae

Polymorphitidae

Seven families share the layers of lower Pliensbachian in the south of Eastern Berry. Liparoceratdiae dominate fauna in number and species : as Juraphyllitidae, Polymorphitidae, Eoderoceratidae, Lytoceratidae, Dactylioceratidae and finally Oxynoticeratidae.

Zone fossils

Tragophylloceras ibex (Quenst.)
Prodactylioceras davoei ( Sow.)

Davoei Zone

Accompanying fauna

Lytoceras fimbriatum (Sow.)
Derolytoceras tortum (Quenst.)
Liparoceras pseudostriatum (True.)
L.(Becheiceras) gr. bechei (Sow.) - gallicum (Spath)

Some characteristic species of the Davoei Zone

Ibex Zone

Accompanying fauna

Tragophylloceras numismale (Quenst.)
Tragophylloceras loscombi (Sow.)
Metacymbites centriglobus (Opp.)
Radstockiceras gemmelaroi (Pompj.)
Lytoceras fimbriatum (Sow.)
Derolytoceras tortum (Quenst.)
Tropidoceras gr. flandrini (Dum.)

Some characteristic species of the Ibex Zone

Tragophylloceras ibex (Quenst.)
Tragophylloceras undulatum (Smith)
Tragophylloceras cottardiense (Joly)
Liparoceras pseudostriatum (True.)
Liparoceras cheltiense (Murch.)
Metaderoceras venarense (Opp.)
Tropidoceras masseanum (d'Orb.)
Acanthopleuroceras carinatum (Quenst.)
Acanthopleuroceras maugenesti (d'Orb.)
Acanthopleuroceras valdani (d'Orb.)
Acanthopleuroceras alisiene (Reyn.)
Acanthopleuroceras stahli (Opp.)
Ae. Beaniceras centaurus (d'Orb.)
Ae. Beaniceras rotundum (Buck.)
Ae. Beaniceras crassum (Mou., Dom. & Rocha)
Ae. Beaniceras geyeri (Spath)
Ae. Beaniceras luridum (Phelps)

Jamesoni Zone

Accompanying fauna covering several Subzones

Tragophylloceras numismale (Quenst.)
Lytoceras fimbriatum (Sow.)
Derolytoceras tortum (Quenst.)
Tropidoceras gr. flandrini (Dum.)
Tropidoceras obtusum (Futt.)

Some characteristic species of the Jamesoni zone

Uptonia jamesoni (Sow.)
Uptonia bronni (Roem.)
Uptonia confusa (Quenst.)
Uptonia regnardi (d'Orb.)
Uptonia lata (Quenst.)
Coeloceras pettos (Quenst.)
"Polymorphites" evolutus (Mou. & Dom.)