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Home Latest Update :  3 Tuesday April 2012
Other Genus
OrderFORAMINIFERIDA
Sub OrderROTALIINA
Super FamilyASTERIGERINACEA
FamilyASTERIGERINATIDAE
Genus EOEPONIDELLA
EOEPONIDELLA Wickenden, 1949
 
Type species: Eoeponidella linki Wickenden, 1949; OD(M).Eoeponidella Wickenden, 1949 (*3372), p. 81. Heminwayina Bermúdez, 1951 (*204), p. 325: type species: Discorbis multisectus Galloway and Heminway,
1941(*1207), p. 384; OD.Asterellina Anderson, 1963 (*37), p. 313: type species: Pninaella? pulchella F. L. Parker, 1952(*2339) p.420; OD.Eoeponidella (Umboasterella) Seiglie. 1965(*2846), p. 6; type species: Eoeponidella (Umboasterella) meyerhoffi Seiglie, 1965: OD.Test small, planoconvex to biconvex, two to three whorls, chambers crescentic and sutures depressed, curved, and oblique on the convex spiral side, five to eight chambers in the final whorl, sutures radial on the centrally depressed and flatter involute umbilical side where a secondarily added umbilical plate over the aperture forms a stellate series around the umbilicus, occasional specimens may have a small umbilical plug, periphery rounded to subangular; wall calcareous, finely to relatively coarsely perforate; primary aperture a broad interiomarginal arch in the umbilical face of the final chamber, the aperture obscured as the supplementary coverplate is added, leaving only a small opening near the proximal chamber margin. U. Cretaceous (Campan­ian) to Holocene; cosmopolitan.
 
Remarks: Heminwayina was placed in synonymy by Loeblich and Tappan (1964, *1910, p. C577), Asterellina was considered a syno­nym by Seiglie (1964, *2846), Seiglie and Ber­múdez (1965, *2852), and Haman, 1973, *1369); Eoeponidella (Umboasterella) was regarded as differing in having an umbilical plug, rather than a simple umbilicus, but this feature appears variable even within a species, as noted by Anderson for Asterellina. The holotype of Pninaella pulchella also has a plug, although the paratype does not appear to have this, hence if this character were used for generic separation, Asterellina would have priority over Umboasterella.
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