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It is an unsettled issue in foraminiferal research what range of morphological variability is intraspecific. The approach varies significantly between specialists. In most cases we adopt a wide definition of the species listed.

Arenaceous

....... Astrorhizoides polygona (Heron-Allen & Earland)
....... Hyperammina subnodosa Brady
....... Technitella legumen Norman
....... Saccorhiza ramosa (Brady)
....... Reophax pilulifer Brady

Calcareous

....... Epistominella arctica Green
....... Eponides tener (Brady)
....... Eponides tumidulis (Brady) horvathi Green
....... Stetsonia horvathi Green
....... Discorbidae spp. Please look at and comment
....... Melonis barleeanus (Williamson)
....... Elphidiella arctica (Parker & Jones)
....... Elphidium bartletti Cushman
....... Elphidium subarcticum Cushman
....... Elphidium incertum (Williamsom)
....... Elphidium excavatum (Terquem) clavatum Cushman
....... Cassidulina reniforme Nørvang
....... Neogloboquadrina pachyderma (Ehrenberg)

References cited