Bident Jupiter (also known as Jove, Etruscan Tinia), the trident or bident thus represents a forked lightning bolt. In ancient Italy, thunder and lightning were read as signs of divine will, wielded by the sky god Jupiter in three forms or degrees of severity (see "manubia"). The Romans drew on Etruscan traditions for the interpretation of these signs. A tile found at Urbs Salvia in Picenum depicts an unusual composite Jove, "fairly bristling with weapons": a lightning bolt, a bident, and a trident, uniting the realms of sky, earth, and sea, and representing the three degrees of ominous lightning (see also
Amalthea (mythology) or inscription to join the two. Hyginus describes this catasterism in the "Poetic Astronomy", in speaking of Auriga, the Charioteer: <poem>Parmeniscus says that a certain Melisseus was king in Crete, and to his daughters Jove was brought to nurse. Since they did not have milk, they furnished him a she-goat, Amaltheia by name, who is said to have reared him. She often bore twin kids, and at the very time that Jove was brought to her to nurse, had borne a pair. And so because of the kindness of the mother, the kids, too were placed among the constellations. Cleostratus