His title is not preserved. He commanded a middle section of Antony's fleet at Actium (Plut. Ant. 65.1; cf. Gardthausen 2.198, note 33). (Broughton MRR II)
In MRR 2.421, he is better listed as a leg., lieut. or a praef. class., as in the Index, 2.574, than as a promagistrate. See Wiseman, NM 236, no. 216.
(Broughton MRR III)