| Freshwater Snails of Ontario |
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| Viviparidae - Mystery Snails |
| Pleuroceridae - Horn Snails |
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| Lymnaeidae - Pond Snails |
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| Planorbidae - Ramshorn Snails |
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| Brown Mystery Snail (Campeloma decisum) up to 42mm |
| Banded Mystery Snail (Viviparus georgianus) up to 35mm |
| Flat-Sided Horn Snail (Pleurocera acuta) up to 37mm |
| Great Pond Snail (Lymnaea stagnalis stagnalis) up to 56mm |
| Common Stagnicola (Stagnicola elodes) up to 32mm |
| Bell-Mouthed Ramshorn (Helisoma campanulatum campanulatum) up to 15mm wide |
| Larger Eastern Ramshorn (Helisoma trivolvis trivolvis) up to 32mm wide |
| Gyraulus (Gyraulus sp.) up to 5mm wide |
| Valvatidae - Valve Snails |
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| Three-Keeled Valve Snail (Valvata tricarinata) up to 5mm wide |
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| Keeled Promenetus (Promenetus exacuous exacuous) up to 7mm wide |
| Physidae - Tadpole Snails |
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| Tadpole Snail (Physa sp.) up to 24mm |
| Fossil Molluscs & Brachiopods |
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| Fossil Marine Molluscs Ordovician (490-443 MYA) Peterborough, ON. |
| Brachiopods (Order Rhynchonellida) Ordovician (490-443 MYA) Peterborough, ON. |
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| Ammonite (Anapuzosia saint-oursi) Mahajanga Province, Madagascar Lower Cretaceous |
| Ammonite (Desmoceras sp.) Mahajanga Province, Madagascar Lower Cretaceous |