Nerineidae

The Nerineidae is an extinct taxonomic family of fossil sea snails, marine gastropod mollusks in the informal group Lower Heterobranchia.^[1]

Nerineidae
Bactroptyxis trachaea, Aubry-en-exmes, Normandy, France; Middle Jurassic (Bathonian).
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
(unranked):	clade Heterobranchia informal group Lower Heterobranchia
Superfamily:	Nerineoidea
Family:	Nerineidae Zittel, 1873

Genera

Genera within the family Nerineidae include:

• Nerinea, the type genus
• Bactroptyxis

Bactroptyxis trachaea, Aubry-en-exmes, Normandy, France; Middle Jurassic (Bathonian). Close-up view of interior.