Not much is known about Prytanis prior to the civil war, but he was the youngest son of Paerisades, and thus last in line of succession, and sided with his eldest brother Satyros when Eumelos launched his rival claim for the throne. Upon Satyros' death, his mercenary captain Meniscus brought the body back to Panticapaeum through Gargaza. Here, Prytanis held a great funeral for his elder brother and quickly went to Gargaza, taking both the army and royal power. Eumelos sent envoys to Prytanis, but he ignored them and left a garrison in Gargaza so that he could quickly return to
Panticapaeum in order to secure the throne for himself. While Prytanis was in Panticapaeum, Eumelos took Gargaza and several other cities. Prytanis then took the field against his brother near the
Maeotic Lake, but was defeated and Eumelos forced him to turn over command of the army and abdicate in his favor. ==Death==