Pegasides name of a nymph who had sex with the Trojan prince Emathion and gave birth beside the river Granicus to Atymnius. The latter was eventually killed by Odysseus in the Trojan War. Pegasides Pegasides () were nymphs of Greek mythology connected with wells and springs, specifically those that the mythical horse Pegasus created by striking the ground with his hooves. According to Greek mythological tradition the winged horse Pegasus was the son of Poseidon, sea and river god of the Greeks, equivalent to the Roman Neptune. The hero Bellerophon needed the untamed Pegasus to help him defeat the monster Chimera.
Neptune (mythology) connection of him with the sea was attested, and may even have originally been conceived under equine form. Such a feature is a reflection of his own chronic, violent, brutal nature as earth-quaker, as well as of the link of the horse with springs, i.e. underground water, and the psychopompous character inherent in this animal. There is no such direct connection in Rome. Neptune does not show any direct equine character or linkage. On the other hand, Roman god Consus was associated with horses: his underground altar was located in the valley of the Circus Maximus at the foot of