The Argentinian caught Parra with his shoulder late in the first half of Stade's 29-25 win at the Stade Charlety in Paris.
English citing commissioner Alan Mansell made the complaint against Roncero in contravention of law 10.4 (f) - dangerous charging or obstructing of an opponent without the ball including shouldering.
A hearing will be held at a date to be announced.
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