[1] Fabius belonged to the patrician Fabia gens and the branch known as the Fabii Vibulani, one of the republics oldest and most successful consular families.
It remains unclear what role Fabius played during this episode and Sempronius was later convicted and fined after a long trial ending in 420 BC.
[3][4][5][6][7] In 416 BC Fabius was elected as consular tribune together with Aulus Sempronius Atratinus (cousin of his former colleague), Marcus Papirius Mugillanus and Spurius Nautius Rutilus.
His colleague would have been Gaius Furius Pacilus and little is known of the events during the consulship with the exception of a proposal for an agrarian law put forward by the plebeian tribune Lucius Icilius.
The classicist Münzer suggested that both consulships were held by Quintus Fabius Vibulanus while later scholars such as Degrassi and Broughton identify the consuls as two different individuals.