Wales lock Ian Evans will miss the Six Nations after receiving a 12-week ban.
The Ospreys forward has been suspended after he was sent off for stamping on Leinster forward Mike McCarthy during the Welsh side's 36-3 Heineken Cup defeat in Dublin last Friday.
Evans admitted the offence at a disciplinary hearing in Dublin and he cannot play again until April 21.
The period of suspension actually runs over 13 weeks as judicial officer, England's Jeremy Summers, took into account one week during the Six Nations
period when Evans, who has a right of appeal, would not have played.
Summers heard evidence and submissions from Evans, Ospreys team manager Andy Lloyd and ERC's disciplinary officer.
In a statement, ERC said: "In upholding the red card decision, the judicial officer stated that the incident involved at least two stamps which connected with McCarthy's head and which resulted in a serious facial wound.
"Mr Summers also stated that there was no place in the game for conduct of this kind - a view which Evans himself accepted during the hearing.
"The judicial officer determined that the offence was at the top end of the IRB (International Rugby Board) sanctions for offences of this nature and selected 16 weeks as the appropriate entry point.
"As there were no aggravating factors, he reduced the suspension by four weeks due to the player's guilty plea, good conduct and remorse during the hearing."
Evans, 29, has won 32 caps and toured Australia with the British and Irish Lions last summer.
He would have been a key part of Wales coach Warren Gatland's plans, having established a strong second-row partnership at regional and Test level with Alun-Wyn Jones.
Wales kick off their Six Nations campaign at home to Italy on February 1.