Narrative

Gastropods (Class Gastropoda) contain the snails, conchs, and similar snail-like animals. There are about 105,000 species of gastropods. This class is divided into several separate orders:

Sub Class Streptoneura - (57,000 species)
Order Diotocardia: - Two sets of organs
Order Monotocardia: - One set of organs

Sub Class Euthyneura - (48,000 species)
Order Cephalaspidea: - thin shells, etcetera
Order Nudibranchia: - sea slugs
Order Pulmonata: - snails and slugs

Taxonomy

References