"Leontiniidae"@en . "Leontiniidae is an extinct family comprising six genera of notoungulate mammals known from the middle Eocene through middle Miocene of South America (McKenna and Bell, 1997)."@en . . "Leontiniidae is an extinct family comprising six genera of notoungulate mammals known from the middle Eocene through middle Miocene of South America (McKenna and Bell, 1997)."@en . . . . . . .