Wasps back row forward Genaro Fessia will take the place of the injured Alvaro Galindo in Argentina's 30-strong squad for the World Cup in New Zealand next month.
Galindo pulled a thigh muscle while playing for French club side Racing Metro at the weekend.
Fessia will join up with the Pumas during the week before they head for New Zealand, the Argentina Rugby Federation announced.
Argentina squad - revised:
Forwards: Patricio Albacete (Toulouse/France), Marcos Ayerza (Leicester Tigers/England), Maximiliano Bustos (Montpellier/France) Alejandro Campos (Agen/France), Manuel Carizza (Biarritz/France), Agustin Creevy (Montpellier/France), Julio Alfredo Farias Cabello (Tucuman RC), Juan Martin Fernandez Lobbe (Toulon/France), Juan Figallo (Montpellier/France), Mariano Galarza (Pampas XV), Genaro Fessia (Wasps/England), Mario Ledesma (no club), Juan Manuel Leguizamon (Lyon/France), Rodrigo Roncero (Stade Francais/France), Martin Scelzo (Agen/France), Leonardo Senatore (Gimnasia y Esgrima Rosario), Nicolas Vergallo (Toulouse/France).
Backs: Horacio Agulla (Leicester Tigers/England), Marcelo Bosch (Biarritz/France), Gonzalo Camacho (Exeter/England), Felipe Contepomi (Stade Francais/France), Santiago Fernandez (Montpellier/France), Lucas Gonzalez Amorosino (Montpellier/France), Agustin Gosio (Club Newman), Juan Jose Imhoff (Duendes RC Rosario), Alfredo Lalanne (London Irish/England), Martin Rodriguez (Stade Francais/France) Federico Sanches (Bordeaux Begles/France), Gonzalo Tiesi (Stade Francais/France) Tomas Vallejos (Harlequins/England).
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