| Type of | : | Opalinata (Subphylum) Wenyon, 1926 | |
Ref: T. Cavalier-Smith, 2004: table 4.1 (p. 77). [inferred] |
| Type of | : | Opalinata (Superclass) Wenyon, 1926 | |
Ref: T. Cavalier-Smith & J.M. Scoble, 2013(2012): table 1 (p. 333). [inferred] |
| Type of | : | Opalinea (Class) Wenyon (1926) | |
Ref: T. Cavalier-Smith, 2004: table 4.1 (p. 77). [inferred] |
| Type of | : | Opalinida (Order) Poche, 1913 | |
Ref: T. Cavalier-Smith & J.M. Scoble, 2013(2012): table 1 (p. 333). [inferred] |
| Type of | : | Opalinidae (Family) Claus, 1874 | |
Ref: T. Cavalier-Smith & J.M. Scoble, 2013(2012): table 1 (p. 333). [inferred] |