Wikipedia
The Oedipodea is a lost poem of the Theban cycle, a part of the Epic Cycle . The poem was about 6,600 verses long and the authorship was credited by ancient authorities to Cinaethon , a barely known poet who lived probably in Sparta. Only three short fragments and one testimonium survived.
It told the story of the Sphinx and Oedipus and presented an alternative view of the Oedipus myth. According to Pausanias, Cinaethon states that the marriage between Oedipus and his own mother, Jocasta (= Epicasta) was childless; his children had been born from another engagement with Euryganeia , daughter of Hyperphas . That is all we know about these two characters.
A small glimpse of Cinaethon's style survives in Plutarch's On the Pythia's Oracles 407b: "he added unnecessary pomp and drama to the oracles".