Children (28 direct children, 37 direct and indirect children):
Planorbella trivolvis
(tree size 2)
Marsh rams-horn
Planorbella magnifica
Magnificent ramshorn
Planorbella duryi
(tree size 1)
Planorbella multivolvis
Acorn ramshorn
Planorbella tenuis
Planorbella traski
Planorbella scalaris
Mesa rams-horn
Planorbella corpulenta
(tree size 2)
Corpulent ramshorn
Planorbella subcrenata
Planorbella oregonensis
Lamb rams-horn
Planorbella campanulata
(tree size 3)
Bellmouth ramshorn
Planorbella columbiensis
Planorbella occidentalis
Planorbella ammon
Planorbella binneyi
Planorbella truncata
Planorbella pilsbryi
(tree size 1)
Planorbella nigricans
Planorbella hornii
Planorbella anceps
Planorbella clewistonensis
Planorbella conanti
Planorbella disstoni
Planorbella fordensis
Planorbella ophis
Planorbella pseudotrivolvis
Planorbella smithii
Planorbella valens