The RFL website has named only 18 players for both sides this week - I expect this is most likely incompetence in the way their web publisher has formatted the text. Other matches have the standard 19-man squads.
Oxford - Biscombe [spelt wrong - what a disgrace, Burnett, Canterbury, Clayton, Cooke, Fleming, Gill, Hayes, Joynt, MacDonald [also spelt wrong, McAllister, McRae, Moules, Newbould, O'Callaghan, Riley, Siddons, Windley

So that's probably:
Stuart Biscomb, Harvey Burnett, Casey Canterbury, Connor Clayton, Will Cooke, Scott Fleming, Jordan Gill, Mark Hayes, Jake Joynt, Curtis Macdonald, Clark McAllister, Dwaine McRae, Brad Moules, Tommy Newbould, Liam O'Callaghan, Kane Riley, Jordan Siddons, Callum Windley

Dual reg - Brad Moules (from Wakefield). Although I've not seen an announcement I think it's dual reg rather than loan.
Loan - none

Compared to last week's squad:
Out - Marcus Brooker, Andy Hoggins, Anthony Cox, Harrison Brough, Jack Pickles, Josh Atkinson
In - Jordan Siddons, Tommy Newbould, Jordan Gill, Clark McAllister, Dwaine McRae,
Also, last week Tom Alexander was in the initial squad but replaced by Connor Clayton before game day.


South Wales from the RFL - Baller, Bateman, C Davies, Duffy, P Edwards, Emanuelli, Farrer, A Gay, I'Anson, B Jones, R Jones, C Parker, Y Parker, Reece, Roets, Vitalini, Willacot, Williams

However, it appears that South Wales have actually announced their line-up:
Ben Jones, Yannick Parker, Christiaan Roets, Lewis Reece, Paul Edwards, Andy Gay, Shaun Owens, Jamie l'Anson, Connor Farrer, Chris Davies, Zak Williams, Connor Parker, Ash Bateman
Interchanges - Izaak Duffy, Richard Jones, Chris Vitalini, Paul Emanuelli
Left out - Baller, Willacot (Shaun Owens isn't in the 18, giving more weight to my belief that it's an error)