Spirobolidae
(tree size 327)
Messicobolidae
(tree size 32)
Pseudospirobolellidae
(tree size 18)
Allopocockiidae
(tree size 15)
Atopetholidae
(tree size 97)
Rhinocricidae
(tree size 919)
Typhlobolellidae
(tree size 10)
Spirobolellidae
(tree size 147)
Floridobolidae
(tree size 3)
Hoffmanobolidae
(tree size 3)