Sinuolineidae Shulman, 1959
Myxoproteus abyssus Yoshino & Moser, 1974
Myxoproteus ambiguus (Thélohan, 1895)
Myxoproteus caudatus Shulman, 1953
Myxoproteus cujaeus Sarkar, 1996
Myxoproteus elongatus Shulman, 1953
Myxoproteus formosus Kovaljova & Gaevskaya, 1979
Myxoproteus impar Zhao & Song, 2003
Myxoproteus irregularis (Kabata, 1962)
Myxoproteus meridianalis Evdokimova, 1977
Myxoproteus ovale Aseeva, 2003
Myxoproteus scoleciformis Kovaljova & Gaevskaya, 1979
