Toby Faletau returned to action the the Dragons' defeat
Newport Gwent Dragons suffered their first defeat under acting head coach Darren Edwards as they slipped to a five try, 38-17 defeat to Magners League leaders Munster in Cork.
Skipper Steve Jones scored a try for the visitors and Jason Tovey kicked 12 points as the Dragons held the league leaders for almost an hour. But two tries from All Blacks legend Doug Howlett paved the way for full back Johne Murphy to clinch the bonus point.
Irish veteran back row man Alan Quinlan wrapped up Munster's win with a late score and the defeat leaves the Dragons 13 points behind the Scarlets in seventh place in the race for automatic qualification for the Heineken Cup, but with two games in hand.
Wales Under-20s head coach Edwards had made an impressive start since taking temporary charge of the Dragons with four wins and draw from his first five games following the departure of Paul Turner.
The Dragons, who included fit-again Wales squad member Toby Faletau, led 9-6 after a hat-trick of penalties by Tovey despite losing Ashley Smith and Robert Sidoli to injury. But Howlett turned the game with two tries before half-time.
Tovey and wing Adam Hughes combined to hand hooker Jones an easy score as the Dragons hit back just two minutes after the break. But Munster, with several Ireland internationals to call-upon, broke free in the final 20 minutes as Mick O'Driscoll, Murphy and Quinlan crossed to settle the game and keep the Irish province nine points clear of reigning champions in the Ospreys in the hunt for a top two finish to clinch a home Play-Off semi-final.
Beating Merthyr has boosted Carmarthen Quins hopes of reaching a top eight spot in the Principality Premiership. Quins captain Haydn Pugh is delighted with his team's progress and is determined that everyone from the Under 6s through to the senior team, enjoys the ride.
When the Wales squad were asked to nominate individuals who played a big part in their early playing days, Wales and Dragons full back and wing Hallam Amos thought of his former Monmouth School rugby coach John Bevan.
Sam Cross and Luke Treharne have been named as co-captains of the Wales Sevens side as head coach Gareth Williams names his 12-man squad to play in the first leg of the HSBC World Series in Dubai next weekend.
Bedwas head coach Steve Law and players Nicky Griffiths and Alun Rees extol the virtues of the close knit club as they prepare to host third place RGC 1404 - who are one place head of them on the Principality Premiership points table - on Saturday.
Many of the Wales squad have said Diolch (thank you) to someone who played an important part in their early playing days by nominating them to be invited to the Wales v South Africa match. One person, Gowerton Comprehensive geography teacher Mr Dean Mason was nominated by two of his former pupils, Dan Biggar and Sam Davies.
The second WRU disability rugby pilot has been delivered, this time in Caerphilly schools, culminating in a festival at the Caerphilly Centre of Sporting Excellence, Ystrad Mynach tomorrow. Plans are in place to set up a Disability Rugby Club in Newbridge to provide long-term playing opportunities.
WRU TV: Hear from inside the Wales camp as Neil Jenkins discusses this weekend's clash with South Africa and how the squad are looking to put in a strong performance to round of the 2016 Under Armour Series