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Ellipsoidina
Taxonomy
Ellipsoidina was named by Seguenza (1859) [Sepkoski's age data: T Eo T Plio]. It was considered unknown by Hayward et al. (2012).
It was assigned to Foraminiferida by Sepkoski (2002); and to Ellipsoidinidae by Cushman (1927) and Hayward et al. (2012).
It was assigned to Foraminiferida by Sepkoski (2002); and to Ellipsoidinidae by Cushman (1927) and Hayward et al. (2012).
Synonymy list
Year | Name and author |
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1859 | Ellipsoidina Seguenza |
1927 | Ellipsoidina Cushman p. 72 |
2002 | Ellipsoidina Sepkoski |
2012 | Ellipsoidina Hayward et al. p. 206 |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
G. †Ellipsoidina Seguenza 1859
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Diagnosis
Reference | Diagnosis | |
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B.W. Hayward et al. 2012 | Test small to large, may be biserial to uniserial, circular in cross-section; last chamber completely enveloping the former chambers, or sometimes overlapping biserial earlier part and only completely enveloping the test when
it becomes uniserial; chambers ovoid to spherical, attached only at the base of the test; wall smooth or striate; aperture terminal, lunate to chevron-shaped slit; possesses an internal successive, hemi-cylindrical tooth plate between foramina. |
Measurements
No measurements are available
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Source: o = order | |||||
Reference: Kiessling 2004 |