He was the grandson of Artemisia, and son of Pisindelis, the previous tyrant.
[1] Lygdamis assassinated the poet Panyassis, uncle of famous historian Herodotus, in 461, which forced Herodotus to leave his native city of Halicarnassus, fleeing to the island of Samos.
[2] After the death of Lygdamis, circa 454 BCE, Halicarnassus joined the Athenian alliance, known as the Delian League.
[2] At that time, Halicarnassus started to appear on the Athenian tribute quota lists.
[3] From 395 BCE, Caria would again fall under the control of the Achaemenid Empire and be ruled by a new dynasty of local tyrants, the Hecatomnids.