cassidulindae cassidulindae the cassidulinidae is a family of paleocene to recent benthic foraminifera (amoeboid protists) that make up part of the rotaliid superfamily cassidulinacea, characterized by calcareous test with biserially arranged chambers in a planispiral coil, at least in the early stage, but which later may uncoil. cassidulindaetemporal range: paleocene - recent scientific classification domain: eukaryota (unranked): sar (unranked): rhizaria superphylum: retaria phylum: foraminifera order: rotaliida superfamily: cassidulinacea family: cassidulindae(d'orbigny, 1839) subfamiies see text the cassidulinidae includes three subfamilies, the cassidulininae, ehrenbergininae, and orthoplectinae, which contain as many as fourteen (14) genera.