Archaeogastropoda

Archaeogastropoda includes 16 children:

• Calliostomatidae Thiele 1924
• Cyclostrematidae
• Haliotididae
• Hydrocenidae
• Lepetodrilidae McLean 1988
• Neomphalidae McLean 1981
• Neritopsidae
• Pleurotomariidae Swainson 1840 (slit shells)
• Pseudococculinidae Hickman 1983
• Pyropeltidae McLean & Haszprunar 1987
• Seguenziidae Verrill 1884
• Stomatellidae
• Titiscaniidae
• Tricoliidae
• Trochidae Rafinesque 1815 (top snails)
• Trubinidae
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