Many of the genealogies of the early Frankish rulers are made up of a mixture of some poorly sourced historical characters with mythical characters invented to fill in various gaps in the genealogy.
Argotta or Argote seems to be one of these mythical characters, and in fact wasn't named as the wife of Pharamond and mother of several children, including possibly Chlodio until 1801. There is no early source that names her.
Any relationship with Quintus Taras (if he even existed) would also presumably be a fabrication.