''Cassidulina'' is a genus of foraminifera described in the Treatise Part C. ( 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 Cushman, 1950. Related genera include '' Cassidulinella'', '' Favocassidulina'', '' Globocassidulina'', and '' Buriela''. ''Cassidulina'', itself, is cosmopolitan, with a stratigraphic range extending from the Upper Eocene to recent.

Species

* '' Cassidulina albemariensis'' McCulloch, 1977 * '' Cassidulina alternans'' Yabe & Hanzawa, 1925 * '' Cassidulina asanoi'' Uchio, 1950 * '' Cassidulina bradshawi'' Uchio, 1960 * '' Cassidulina braziliensis'' Cushman, 1922 * '' Cassidulina caledoniana'' McCulloch, 1981 * '' Cassidulina carapitana'' Hedberg, 1937 † * '' Cassidulina carinata'' Silvestri, 1896 * '' Cassidulina costatula'' Cushman, 1933 * '' Cassidulina cretacea'' Cushman, 1931 * '' Cassidulina crustosa'' Saidova, 1975 * '' Cassidulina curvata'' Phleger & Parker, 1951 * '' Cassidulina curvatiformis'' McCulloch, 1977 * '' Cassidulina cushmani'' R.E. & K.C. Stewart, 1930 * '' Cassidulina deafueraensis'' McCulloch, 1977 * '' Cassidulina delicatiformis'' (McCulloch, 1977) * '' Cassidulina detierraensis'' McCulloch, 1977 * '' Cassidulina differens'' McCulloch, 1977 * '' Cassidulina elegantissima'' Cushman, 1925 * '' Cassidulina globosa'' Hantken, 1865 * '' Cassidulina hoodensis'' McCulloch, 1977 * '' Cassidulina inflatiformis'' McCulloch, 1977 * '' Cassidulina insueta'' Cushman, 1947 * '' Cassidulina izuensis'' Aoki, 1967 * '' Cassidulina kasiwazakiensis'' Husezima & Maruhasi, 1944 * '' Cassidulina laevigata'' d'Orbigny, 1826 * '' Cassidulina limbata'' Cushman & Hughes, 1925 * '' Cassidulina lineocorrugata'' McCulloch, 1977 * '' Cassidulina lobulata'' McCulloch, 1977 * '' Cassidulina lomitensis'' Galloway & Wissler, 1927 * '' Cassidulina margareta'' Karrer, 1877 † * '' Cassidulina marshallana'' Todd, 1954 * '' Cassidulina moluccensis'' Germeraad, 1946 * '' Cassidulina monicaniformis'' McCulloch, 1977 * '' Cassidulina monstruosa'' Voloshinova, 1952 † * '' Cassidulina neoteretis'' Seidenkrantz, 1995 * '' Cassidulina norvangi'' Thalmann, 1952 * '' Cassidulina obtusa'' Williamson, 1858 * '' Cassidulina oshimai'' Aoki, 1967 * '' Cassidulina palmerae'' Bermúdez & Acosta, 1940 * '' Cassidulina patula'' Cushman, 1933 * '' Cassidulina penangensis'' McCulloch, 1977 * '' Cassidulina perumbonata'' Keyzer, 1953 * '' Cassidulina pilasensis'' McCulloch, 1977 * '' Cassidulina planata'' Saidova, 1975 * '' Cassidulina planulata'' McCulloch, 1977 * '' Cassidulina pulchella'' d'Orbigny, 1839 * '' Cassidulina quadrata'' Cushman & Hughes, 1925 * '' Cassidulina radiata'' Chave, 1987 * '' Cassidulina rarilocula'' Cushman, 1933 * '' Cassidulina reniforme'' Nørvangi, 1945 * '' Cassidulina seca'' McCulloch, 1977 * '' Cassidulina simpsonsbayensis'' McCulloch, 1977 * '' Cassidulina spiniferiformis'' McCulloch, 1977 * '' Cassidulina spiralis'' Natland, 1938 * '' Cassidulina striatostoma'' Zheng, 1979 * '' Cassidulina subcalifornica'' Drooger, 1953 * '' Cassidulina subcarinata'' Uchio, 1960 * '' Cassidulina sublaevigata'' Hofker, 1956 * '' Cassidulina sublimbata'' Asano & Nakamura, 1937 * '' Cassidulina subtumida'' Cushman, 1933 * '' Cassidulina teretis'' Tappan, 1951 * '' Cassidulina tortuosa'' Cushman & Hughes, 1925 * '' Cassidulina translucens'' Cushman & Hughes, 1925 * '' Cassidulina tumida'' Natland, 1938 * '' Cassidulina velaensis'' McCulloch, 1981 * '' Cassidulina victoriensis'' Collins, 1974 * '' Cassidulina vulgata'' McCulloch, 1977 * '' Cassidulina wakasaensis'' Asano & Nakamura, 1937 * '' Cassidulina weinmanensis'' McCulloch, 1977 * '' Cassidulina wordeni'' McCulloch, 1977 * '' Cassidulina wrangellensis'' McCulloch, 1977 * '' Cassidulina yabei'' Asano & Nakamura, 1937

References

* Joseph A. Cushman, 1950. Foraminifera, their classification and economic use. Harvard University Press, Cambridge, Massachusetts. 4th edition, 1950 * Alfred R. Loeblich, Jr. and Helen Tappan, 1964. Sarcodina, chiefy "Thecamoebians" and Foraminiferida. Treatise on Invertebrate Paleontology, Part C, Protista 2. Geological Society of America and University of Kansas Press, 1964. * Alfred R. Loeblich, Jr. and Helen Tappan, 1988. Forminiferal Genera and their classification. Geological Survey of Iran, (e-book) 2005

External links

*
''Cassidulina'' at the Worls Register of Marine Species (WoRMS)
{{Taxonbar, from=Q5049369 Rotaliida genera Fossil taxa described in 1826 Extant Eocene first appearances