[3] Servilius was appointed to replace Spurius Postumius Albus Regillensis in his religious functions, when the later died in 439 BC.
He selected the former consul Postumus Aebutius Helva Cornicen as his magister equitum, or vice-dictator, and successfully defeated and captured Fidenae.
[11][12][13] He is listed as having died in 390 BC and that he was succeeded by Marcus Furius Fusus in his religious office as augur or pontifex.
[14][15][16] Considering that 390 BC was in the close aftermath of the semi-legendary Battle of Allia, it is possible that Servilius was killed in the conflict or the following sack/siege of Rome, or that he simply died of unrelated causes in the same year as the events.
Livy, "Ab Urbe Condita", Book IV Dessau, Hermann, Inscriptiones Latinae Selectae, 9338 Corpus Inscriptionum Latinarum, 6.37161 Fasti Capitolini Broughton, Thomas (1951).