Genus Nodosaria Lamarck, 1816

Diagnosis

Test uniserial, sutures horizontal, perpendicular to test axis. Surface smooth or with vertical costae; aperture radiate, or circular, bordered with radial grooves (Hayward et al. 2012). Species of this genus in Icelandic waters have sub-globular to pyriform and slightly embracing chambers, resulting in a moderately nodular shape.