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| Inversoceras perversum, Barrande from Prague Zadní Kopanina (Czech Republic) at the National Museum (Prague) | |
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| Family: | Trimeroceratidae Hyatt and Zittel 1900 |
Trimeroceratidae is a family of molluscs in the order Oncocerida. These molluscs were fast-moving nektobenthic carnivores. They lived in the Silurian period.
Species have been found in Silurian-era strata of Canada (Québec), China, Czechia, Italy, Russia, Sweden, and the United States (Indiana, Wisconsin).