Tommy Bowe scores the first of his four tries against Treviso
Ireland's Tommy Bowe scored four of the Ospreys' 10 tries as they claimed a bonus point for a Heineken Cup record win over Treviso at Liberty Stadium.
Nikki Walker scored twice with Jonathan Thomas, Lee Byrne, Shane Williams and Ed Shervington also going over.
In the process the Ospreys set new tournament marks of highest team score and winning margin.
There was also a new Ospreys European record for fly-half James Hook, who kicked nine conversions.
The Italian visitors scored first through fly-half Marius Goosen's try, but were no match for the hosts, who were 40-8 ahead at half-time.
After Goosen's try it was one-way traffic as Bowe kicked off the Ospreys' challenge before completing his first-half hat-trick.
The Irishman's first-half touchdowns were interspersed by a Walker brace and one for flanker Thomas on his return from a groin injury.
James Hook makes a break against Treviso
Number eight Filo Tiatia's tap penalty in his own half led to Walker's first try while Hook's break paved the way for Bowe's second touchdown.
However, Walker's involvement was curtailed shortly before the break, the Scottish wing limping off to be replaced by International Rugby Board player of the year Williams.
Adam Jones and flanker Thomas were making their 100th Ospreys appearances, although the prop's afternoon was cut short when he was replaced in the second-half by Cai Griffiths.
Wales full-back Byrne extended the Ospreys lead with the first score of the second-half after Hook's run was again halted.
The fly-half again converted, and the visitors were almost rewarded for their efforts early in the second period when Fraser Waters got over the line only for Williams to wrap himself around the ex-Wasps centre and prevent the touchdown.
Wales star Williams then capped a fine week by touching down after Andrew Bishop's break.
Replacement hooker Shervington also went over and Bowe finished off his man-of-the-match display ahead of next weekend's rematch in Treviso.
Ospreys head coach Sean Holley said: "We are hopeful that Gavin [Henson] will be available for next weekend.
"We will watch him closely in training during the week.
"It doesn't look too brilliant for Nikki [Walker], I have to say. It appears to be a hamstring injury, and he is laid up at the moment.
"We are pretty pleased with that performance. It is mentally and physically demanding for the players coming back from autumn Tests, and it also says a lot about our squad strength in depth.
"Tommy [Bowe]won man-of-the-match, but I thought James Hook was outstanding.
"James set the tone of our performance - he showed our intent."
Ospreys: Byrne, Bowe, Parker, A. Bishop, Walker, Hook, Wells, James, Hibbard, A. Jones, Gough, A. Jones, Thomas, Holah, Tiatia. Replacements: Williams for Walker (41), Webb for Wells (70), Smith for James (72), Tandy for A. Jones (47), Griffiths for A. Jones (52). Not Used: Shervington, Biggar.
Sin Bin: James (59).
Treviso: Williams, Mulieri, De Jager, Waters, Goosen, Marcato, Botes, Sbaraglini, Intoppa, Di Santo, A. Pavanello, van Zyl, Orlando, Louw, Kingi. Replacements: Vilk for Mulieri (47), E. Pavanello for Sbaraglini (47), A. Ceccato for Intoppa (47), VIdal for Di Santo (47), M. Barbieri for Orlando (34), Gilbride for Louw (67). Not Used: Lucchese.
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