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Globigerinella adamsi
Taxonomy
Hastigerina (Bolliella) adamsi was named by Banner and Blow (1959). It is not extant.
It was recombined as Globigerinella adamsi by Fraass et al. (2024).
It was recombined as Globigerinella adamsi by Fraass et al. (2024).
Sister species lacking formal opinion data
Entered
by A. McCoy (authorized by J. Sessa) on 2024-11-14
Synonymy list
| Year | Name and author |
|---|---|
| 1959 | Hastigerina (Bolliella) adamsi Banner and Blow p. 13 |
| 2024 | Globigerinella adamsi Fraass et al. |
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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.
†Globigerinella adamsi Banner and Blow 1959
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| F. T. Banner and W. H. Blow 1959 | The adult test is very slightly trochoid, being almost, but not perfectly,
planispiral. The globular proloculum is followed by a whorl of about six rapidly enlarging subglobular chambers in the megalospheric generation; the microspheric generation is not known. The juvenile aperture extends from the ventral 'umbilicus to the periphery and reaches an interiomarginal equatorial position, but is clearly asymmetrical and Hastigerina-like. In the succeeding whorl (also of about six chambers) the chambers are more nearly planispiral and become radially elongate without lateral compression; the chambers may become four times as high as broad. The later chambers are more loosely coiled, and by the end of the second whorl the test is almost equally biumbilicate, and the aperture has an equal extension into each umbilicus. A very thin and narrow, very finely perforate, apertural lip is present on the later chambers. extending back along the umbilical border of each chamber to meet the proceeding chamber. The last formed adult chamber may be in contact only with the immediately preceding chamber, and not directly attached to the penultimate whorl; when this occurs, the primary apertures of the later chambers are not wholly closed, and remain open as relict apertures, which occur first on the ventral umbilical margin. and then (often by the third whorl) on both ventral and dorsal umbilical margins. The wall of the test is thin, uniformly and finely perforate, distinctly and uniformly hispid. |