The primary headword Paktyene is otherwise unattested as a city. (Grammarians -- Aelius Herodianus, Arcadius and Theognostus -- mention the word, and accent it differently, but do not classify it; they merely associate it, grammatically, with Dindymene.) However, the -ene form suggests that the headword is actually a feminine adjective implying the noun 'land' or 'territory'; thus the city concerned is surely Paktye, on the "neck" of the Chersonnese; Barrington Atlas map 51 grid H4.
[1] Only here.