Between brackets is the number of accepted species
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Shows the number of accepted species within the taxon
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- Foraminifera (47 954)
- Class Foraminifera incertae sedis (761)
- Class Fusulinata † (9 261)
- Class Globothalamea (20 534)
- Subclass Rotaliana (13 869)
- Subclass Textulariana (6 046)
- Order Lituolida (3 534)
- Suborder Lituolina (1 546)
- Suborder Nezzazatina (68)
- Suborder Rzehakinina (34)
- Suborder Spiroplectamminina (469)
- Suborder Trochamminina (602)
- Superfamily Trochamminoidea Schwager, 1877 (602)
- Family Adercotrymidae Brönnimann & Whittaker, 1987 (18)
- Family Remaneicidae Loeblich & Tappan, 1964 (15)
- Family Trochamminidae Schwager, 1877 (569)
- Suborder Verneuilinina (815)
- Order Loftusiida (1 021)
- Order Textulariida (1 491)
- Order Trochamminida accepted as Trochamminina
- Order Buliminida accepted as Rotaliida
- Order Carterinida (9)
- Order Robertinida (610)
- Class Monothalamea (1 492)
- Class Nodosariata (10 772)
- Class Tubothalamea (5 134)
- Class Xenophyophorea accepted as Xenophyophoroidea
- Order Foraminiferida accepted as Foraminifera