Marcus Tullius Decula was a consul of the Roman Republic in 81 BC alongside Gnaeus Cornelius Dolabella, during the dictatorship of Sulla; but the consuls of that year were only nominal, as Sulla had all the power in his hands.
His father was perhaps Marcus Tullius, triumvir monetalis in 120 BC.
[1] This article incorporates text from a publication now in the public domain: Smith, William, ed.
"Decula, M. Tullius".
Dictionary of Greek and Roman Biography and Mythology.