Scotland hooker Fraser Brown has been cited for his dangerous tackle on Elliot Daly in Saturday's Six Nations loss to England.
Glasgow Warriors picked up a bonus-point victory with a convincing 47-17 win over the Dragons at at Scotstoun.
Players from Super Rugby rub shoulders with the PRO12, plus a star from the Sevens circuit makes the team this week.
Sale have signed Scotland international forward Josh Strauss from Glasgow Warriors on a three-year deal.
Ospreys moved within a point of top spot in the Guinness Pro12 with a bonus-point 26-15 win over Glasgow.
New Zealand-born flanker Callum Gibbins will join Glasgow on a three-year deal ahead of the 2017-18 Guinness PRO12 season.
Stuart Barnes on a great Sunday for the Premiership's northern clubs and concerns for Test rugby in the southern hemisphere.
Ulster registered a second bonus-point win in succession over Scottish sides when they defeated a weakened Glasgow 37-17.
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