Storing Mod Entity Types

If I have a mod that adds entities, can I store the type of an entity from that mod inside an EntityType object? If not, what’s the best way which avoids storing the class or a dummy entity of that type?

Edit: Also, if I have a Entity ID / name string, how would I parse it into said EntityType?

Every registered mod from the forge side is already registered as an EntityType. Quite honestly, you could get the EntityType for your entity during the init phase if you register your entity type during the preinit phase.