Cassidulina Elegantissima
''Cassidulina'' may refer to: * ''Cassidulina'' (foraminifera), a genus in the family Cassidulinidae * Cassidulina (echinoderms), a superfamily of sea urchins in the order Cassiduloida Cassiduloida is an order (biology), order of sea urchins. The group was extremely diverse with many families and species during the Mesozoic, but today, only seven extant species remain. A 2019 phylogenetic systematics study by Souto et al. pres ...

Cassidulina (foraminifera)
''Cassidulina'' is a genus of foraminifera described in the Treatise on Invertebrate Paleontology, Treatise Part C. (Alfred R. Loeblich Jr, Loeblich & Helen Niña Tappan Loeblich, Tappan, 1964), as having a free, lenticular test, with central boss of clear calcite on either side. Chambers are biserially arranged, enrolled planispirally with a subangular to keeled periphery. The wall is calcareous, hyaline (glassy), optically granular, perforate. The surface is smooth with a polished appearance. Sutures are radial to oblique, straight or curved. The aperture is a narrow arched slip at the base of the apertural face, partly closed by an apertural place. (Loeblich and Tappan 1988) The taxonomy of ''Cassidulina'' is rather stable, and is included in the Cassidulinidae at least as far back as Joseph Augustine Cushman, Cushman, 1950. Related genera include ''Cassidulinella'', ''Favocassidulina'', ''Globocassidulina'', and ''Buriela''. ''Cassidulina'', itself, is cosmopolitan, with ...
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Cassidulina (echinoderms)
''Cassidulina'' may refer to: * ''Cassidulina'' (foraminifera), a genus in the family Cassidulinidae * Cassidulina (echinoderms), a superfamily of sea urchins in the order Cassiduloida Cassiduloida is an order (biology), order of sea urchins. The group was extremely diverse with many families and species during the Mesozoic, but today, only seven extant species remain. A 2019 phylogenetic systematics study by Souto et al. pres ...