Sidussa (Ancient Greek: Σίδουσσα or Σιδούσση) was a small town of Ionia, belonging to the territory of Erythrae, noted by Thucydides as a strong place, like Pteleum. Pliny the Elder describes it as an island off the coast of Erythrae. It is probable that the place also bore the name of Sidus (Σιδοῦς), as Stephanus of Byzantium mentions a town of this name in the territory of Erythrae.
Thucydides places it in the territory of Erythrae and says that, like Pteleum it was a fortified place that was used by the Athenian army under the command of Leon and Diomedon to attack positions on Chios in the year 412 BCE.
- Thucydides. History of the Peloponnesian War. Vol. 8.24.
- Pliny. Naturalis Historia. Vol. 5.38.
- Stephanus of Byzantium. Ethnica. Vol. s.v. Σιδοῦς.
- Mogens Herman Hansen & Thomas Heine Nielsen (2004). "Ionia". An inventory of archaic and classical poleis. New York: Oxford University Press. pp. 1098–1099. ISBN 0-19-814099-1.
- Richard Talbert, ed. (2000). Barrington Atlas of the Greek and Roman World. Princeton University Press. p. 56, and directory notes accompanying.
- Lund University. Digital Atlas of the Roman Empire.