- Opus I, king of the Epeians and son of Zeus by Protogeneia, daughter of Deucalion. Opus was the father of Cambyse or Protogeneia who was carried off by Zeus to Mt. Maenalus in Arcadia where she bore a son, the below Opus who was then adopted by Locrus as his own child, for the latter was barren.
- Opus II, son of Locrus or Zeus by Cabya or Cambyse and thus a grandson of Opus I. From him, a portion of the Locris derived their name Opuntii. Locrus gave Opus a city and a people to govern and strangers came to him from Argos, Thebes, Arcadia and Pisa. But among the settlers he chiefly honored the son of Actor and Aegina, Menoetius who became the father of Patroclus. In some accounts, after a quarrel between his father Locrus and Opus, the latter took a great number of the citizens with him and went to seek an oracle about transplanting a colony. The oracle told him to build a city where he should chance to be bitten by a wooden dog, and as he was crossing to the other sea, Opus trod upon a cynosbatus (a sweet brier). Greatly troubled by the wound, he spent several days there, during which he explored the country and found the cities Physcus and Oeantheia and the other cities which the so-called Ozolian Locrians inhabited. Opus was the father of Cynus, father of Hodoedocus, father of Oileus, father of Ajax the Lesser.
- Lucius Mestrius Plutarchus, Moralia with an English Translation by Frank Cole Babbitt. Cambridge, MA. Harvard University Press. London. William Heinemann Ltd. 1936. Online version at the Perseus Digital Library. Greek text available from the same website.
- Pindar, Odes translated by Diane Arnson Svarlien. 1990. Online version at the Perseus Digital Library.
- Pindar, The Odes of Pindar including the Principal Fragments with an Introduction and an English Translation by Sir John Sandys, Litt.D., FBA. Cambridge, MA., Harvard University Press; London, William Heinemann Ltd. 1937. Greek text available at the Perseus Digital Library.
This article incorporates text from a publication now in the public domain: Schmitz, Leonhard (1870). "Opus". In Smith, William (ed.). Dictionary of Greek and Roman Biography and Mythology. 3. p. 40.