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Abyssamina
Taxonomy
Abyssamina was named by Schnitker and Tjalsma (1980) [Sepkoski's age data: T Than T Mi-l-l]. It was considered unknown by Schnitker and Tjalsma (1980).
It was assigned to Pallaimorphininae by Schnitker and Tjalsma (1980); and to Foraminiferida by Sepkoski (2002).
It was assigned to Pallaimorphininae by Schnitker and Tjalsma (1980); and to Foraminiferida by Sepkoski (2002).
Synonymy list
| Year | Name and author |
|---|---|
| 1980 | Abyssamina Schnitker and Tjalsma |
| 2002 | Abyssamina Sepkoski |
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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. †Abyssamina Schnitker and Tjalsma 1980
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| D. Schnitker and L. R. C. Tjalsma 1980 | Test free, spheroidal to compressed. Coiling nearly planispiral with a tendency to become trochospiral, chambers strongly overlapping. Two to 2 1/2 whorls, usually with four chambers in the last whorl. Aperture a half crescentic slit at the base of the last chamber, positioned asymmetrically between the periphery and umbilical area. Apertural face some-what slanted towards dorsal side. Wall calcareous, granular and finely perforate. |
Measurements
No measurements are available
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| Source: o = order | |||||
| Reference: Kiessling 2004 | |||||
Collections
No collection or age range data are available