Fit-again Ulster flank Stephen Ferris features on the list of additional players for the upcoming knockout stages of the Heineken Cup.
Saracens' Will Fraser, Gonzalo Camacho of Leicester Tigers and the vastly-experienced Clermont back-row, Elvis Vermeulen, also feature.
Ferris, who played in the 2012 Heineken Cup final, is currently on the comeback trail following a long-term ankle injury.
The 28-year-old will be in contention for a starting place against Saracens in the quarter-final at Ravenhilll.
Under ERC tournament rules, clubs which have qualified for the knockout stages of the Heineken Cup and Amlin Challenge Cup can nominate up to three players for registration to supplement their initial 38-player European squads.
The registrations of players who were nominated by Thursday, 20 March are subject to confirmation by the relevant Unions and by ERC.
Additional Heineken Cup players:
Clermont: Etienne Falgoux, Uwanakaro Tawalo, Elvis Vermeulen
Leicester Tigers: Gonzalo Camacho, Pablo Matera, Logovii Mulipola
Leinster: Darragh Fanning, Luke McGrath
Munster: Gerry Hurley, Quentin Macdonald, Gerhard van den Heever
Saracens: Will Fraser, Tim Streather
Toulon: Alexandre Menini, Ivan Roux
Toulouse: Francois Cros
Ulster: Stephen Ferris, Stuart Mccloskey, Andrew Warwick
Amlin Challenge Cup:
Bath: Horacio Agulla, Dave Attwood, Charlie Beech
Brive: Petrus Hauman, Jean-Baptiste Pejoine
Gloucester: Billy Burns, Nick Wood, Tom Young
Harlequins: Rob Buchanan, Jack Clifford, Jordan Turner-Hall
London Wasps: Nathan Morris, Brett Sheehan, James Short
Northampton Saints: James Craig, Matti Williams, Will Hooley
Sale Sharks: Josh Beaumont, Viliami Fihaki
Stade FranÃ§ais: Jerome Fillol, Heinke van der Merwe, Paul Williams