Somerville can play at loose-head or tight-head and has made 59 appearances for the All Blacks.
At the moment he must be considered the best loose-head prop in world rugby.
Yapp went to loose-head, with Paul James shifting across the front row to take up the tight-head role.
Lions loose-head prop Gethin Jenkins is still out - despite training on Monday - with a calf injury.
Up front, Ulster's Tom Court gets his chance at loose-head while lock Leo Cullen and Denis Leamy are promoted.
Loose-head prop Lloyd opened the scoring after six minutes before Leeds full-back Leigh Hinton hit the post with a penalty.
But Quins, who had Joe Marler making his Premiership debut at loose-head prop, took the initiative from their own kick-off.
Gill joins Ospreys duo James and Duncan Jones, the Scarlets' Iestyn Thomas and Blues' John Yapp as a loose-head contender.
Nathan Hines moves to the second row and loose-head prop Allan Jacobsen has been declared fit to win his 50th cap.
The only enforced change sees Tim Payne replace Andrew Sheridan at loose-head.
Harlequins prop Ceri Jones also boosted his chances by showing he can acquit himself at tight-head prop as well as loose-head at Test level.
Saints hit back immediately, Shane Geraghty, playing at full-back, counter-attacking from deep and initiating a sweeping move which ended with loose-head prop Tonga'uiha burrowing over.
Loose-head prop Allan Jacobsen is a doubt with a shoulder injury.
He is joined in the front row by veteran loose-head Os du Randt, the only survivor from the Springboks' 1995 World Cup victory on home soil.
"Due to injury and the very good form of both Allan Jacobsen and Kyle Traynor at loose-head, Ryan has had little opportunity for us, " he said.
Gatland took the bold decision to make wholesale substitutions, taking off both half-backs along with his loose-head, his hooker and captain and number eight Ryan Jones.
Loose-head Jones picked up the injury in a December league win over Munster, and after coming out of plaster it was decided that he needed more surgery.
England had missed a long-range penalty through Flood after Wallaby loose-head Ben Daley once again crumpled under pressure and when the visitors lost a line-out David Pocock hammered into midfield.
Wales loose-head prop Gethin Jenkins has booked his first-class flat bed to South Africa along with Scotland's Euan Murray, Vickery and England's Andrew Sheridan, who's coming back to form with Sale.
There are two changes up front as Deiniol Jones takes over from injured Luke Charteris and in the front row Gethin Jenkins' absence (calf) gives Paul James a chance at loose-head prop.
But the match went to uncontested scrums after loose-head Black was forced off only for replacement Murphy to join him with a shoulder injury after just one set-piece against powerful Tim Payne.
But bragging rights went to Paul James as he justified coach Warren Gatland's faith to hand him the number three shirt - twice earning penalties against rival rookie Wyatt Crockett on the Kiwi loose-head.
Gatland is also monitoring Saracens loose-head prop Rhys Gill as he assesses options to play in the number one jersey vacated by Gethin Jenkins, who is out of the Six Nations after under-going toe surgery.
The Ospreys tight-head will join experienced loose-head Gethin Jenkins and Llanelli Scarlets hooker Matthew Rees as the trio are reunited for the first time since taming the fearsome Springboks pack during the second Test in Pretoria.
Cole has flourished this term in the absence of injured veteran Julian White, and cemented his reputation as a Test prop-in-waiting by demolishing Wasps loose-head Tim Payne in the scrum in a Premiership match last month.
Mears and Northampton's Dylan Hartley will fight it out for the hooking berth, Matt Stevens and Phil Vickery at tight-head prop, with the other on the bench, given that Andrew Sheridan is a shoo-in at loose-head prop.
In the front row, Ireland's Jerry Flannery and Scotland's Ross Ford both get two votes apiece at hooker alongside loose-head Jenkins, while another Scot, Euan Murray, is favourite to start at tight-head prop , with only Davies differing.
Gatland has also hinted at making changes in the pack, which again misfired at the line-out and started to creak at the scrum once New Zealand coach Graham Henry sent on loose-head Tony Woodcock for the second half.
Blair scored his first after a slashing break from Robinson had been carried on by mobile loose-head prop Gethin Jenkins, and replacement Sweeney then latched onto a loose ball straight after coming onto the field for the second.
应用推荐