Suborder Laganina Mortensen 1948 (sand dollar)
Full reference: T. Mortensen. 1948. A Monograph of the Echinoidea. IV, 2. Clypeasteroida. Clypeasteridæ, Arachnoidæ, Fibulariidæ, Laganidæ and Scutellidæ. C. A. Reitzel, Copenhagen 1-471
Parent taxon: Clypeasteroida according to J. W. Durham 1955
See also Donovan 1993, Durham 1966 and Kier 1968
Sister taxa: Clypeasterina, Conoclypeidae, Faujasiidae, Oligopygidae, Plesiolampadidae, Prowillungaster, Rotulina, Runa, Scutellina, Tournoueraster, Willungaster
Subtaxa: Neolaganidae Pentedium
Ecology: slow-moving semi-infaunal detritivore
Distribution: