I am still not quite sure what to make of this fragment. So, here it is.
Theodoros of Samothrace, fr. 2 (BNJ 62 f2) = Schol. ad Ap. Rhodes 4.264
“The Arcadians who are supposed to have lived before even the moon…”
᾽Αρκάδες οἳ καὶ πρόσθε σεληναίης ὑδέονται ζώειν]
“The Arcadians seem to have been born before the moon was, as Eudoxos also claims in his Global Tour. Theodôros reports in his 22nd book that the moon came into view before Herakles’ war with the giants. Aristias the Khian in his Foundations and Dionysian the Khalkidean in the first book of his Foundations report that the Selêntians [moon-people] are Arkadian ethnically.”
οἱ ᾽Αρκάδες δοκοῦσι πρὸ τῆς σελήνης γεγονέναι, ὡς καὶ Εὐδοξος ἐν Γῆς Περιόδωι. Θεόδωρος δὲ ἐν κ̄β̄ ὀλίγωι πρότερόν φησι τοῦ πρὸς τοὺς Γίγαντας πολέμου Ηρακλέους τὴν σελήνην φανῆναι. καὶ ᾽Αριστίας ὁ Χῖος ἐν ταῖς Κτίσεσι καὶ Διονύσιος ὁ Χαλκιδεὺς ἐν ᾱ Κτίσεων καὶ ἔθνος φασὶν ᾽Αρκαδίας Σεληνίτας εἶναι.