Contrariwise, Roman Catholicism purported to excommuciate Sabellianism by labelling it heretical; but there are various forms of Sabellianism, and it seems RCC and Oneness embrace deviant forms of Sabellianism, without really understanding it.
The deviant form is where the Son and Father appear initially distinct, but where the Son usurps the place of the Father, and then marries his mother: this form of Trinity, deriving from fertility worship and pagan cults, was articulated by Alexander Hislop in the "Two Babylons", where (pagan) father gods beget (pagan) son gods, which usurp the place of the father gods and marry their mother.
Amongst the more extreme proponents of the RC tradition, Mary was deemed to be married to God, whilst Joseph wasn't construed as her legitimate husband; and so she didn't consumate her marriage with him, which was a human marriage of convenience only (actually many RCs believe in Mary's perpetual virginity). Amongst all forms of the RC tradition, Mary becomes queen of heaven, and so on a par with, and the de facto partner of, Christ, her son, the king of heaven. For Christ is imputed as God and the author of salvation after his resurrection, so taking his Father's place.
This heresy then is a de facto form of Sabellianism: the Son effectively taking the place of the Father as the author of salvation, and as the spouse of Mary. Oneness Pentecostals teach that Mary is the mother of God, and so she must also be Queen of Heaven. Such is equally offensive.