Lewis & Short

Phălantus, i, m., = Φάλαντος, a Spartan who emigrated to Italy and there founded Tarentum: et regnata petam Laconi Rura Phalanto, i.e. Tarentum, Hor. C. 2, 6, 11; Just. 3, 4, 7.
Hence,

  1. A. Phă-lantēus, a, um, adj., Phalantean: Phalanteum Tarentum, Sil. 11, 16.
  2. B. Phă-lantīnus, a, um, adj., Phalantine, poet. for Tarentine: Phalantinus Galesus, Mart. 5, 37, 2.
  3. C. Phălanthum, i, n., poetic name for the city of Tarentum, Mart. 8, 28, 3.