The Etruscan male divinity of fresh and salt water, prominent in North Etruria and on the Piacenza liver. He only takes on a representational similarity to Neptune/Poseidon (bearded with a trident) at a late stage. He appears earlier in the fourth century BC without a beard and perhaps was connected more with rivers than marine waters. He is prominent on both the Zagreb mummy wrapping (in a ritual calendar) and on the Piacenza liver.
Historical Dictionary of the Etruscans. Simon K. F. Stoddart.