Jonathan Thomas will miss Wales' Test against New Zealand after being found guilty of striking an opponent by a disciplinary panel on Wednesday.
Osprey Thomas, 26, was cited for foul play after coming on as a replacement in his side's 20-12 loss at the Blues.
The two-week ban sees Thomas sit out the 7 November All Blacks game but he is available to face Samoa the week after, as his ban ends on 12 November.
Wales coach Warren Gatland has not said if he will call a squad replacement.
One likely candidate to replace Thomas in the 29-man Wales squad would be his Ospreys lock colleague Ian Gough, although with Thomas only missing one game Gatland may stick with his current selection.
A Welsh Rugby Union professional disciplinary panel found Thomas had breached Law 10.4 (a) - striking an opponent - during the fiery derby between his Ospreys side and rivals the Blues on 24 October.
But the panel deemed the offence to be "on the low end of the scale" and Thomas will miss just his region's Magners League game against Glasgow on Friday night, plus the All Blacks game for Wales
Although Thomas started his international career in the back-row, he has proved equally adept in the second-row.
He has played largely at lock for the Ospreys this season, partnering Alun Wyn Jones and replaced Gough against the Blues at Cardiff City Stadium.
Gatland included Thomas in a pool of locks that also included his fellow Osprey Jones, Bradley Davies of the Blues and Newport Gwent Dragon Luke Charteris for the forthcoming Tests against New Zealand, Samoa, Argentina and Australia.
Thomas has won 47 Wales caps, 17 of them as a replacement, and has returned to fitness after groin problems ruled him out of Wales' summer tour to north America.
Thomas, who can play in the back and second-rows, has returned to fitness after groin problems ruled him out of Wales' summer tour to north America.
He has played largely at lock for the Ospreys this season, partnering Jones and replaced Gough at Cardiff City Stadium and has won 47 Wales caps, 17 of them as a replacement.
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