Philastrius's "Catalogue" of heresies would have little value, were it not for the circumstance discovered by Richard Adelbert Lipsius that, for the Christian heresies up to Noetus, the compiler drew from the same source as Epiphanius of Salamis, i.
Recent scholarship, agreeing with a theory of Richard Adelbert Lipsius, suggests that this work Syntagma was the common source for Philastrius and the Panarion of Epiphanius, also.
A great deal of uncertainty exists regarding the history and real cause of the fact that the doctrines of the Seleucians so closely resembled those of Hermogenes, and because Hermogenes is not mentioned by Philastrius, conclude that these two were one and the same system of belief.