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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).
Species lacking formal opinion data
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 | |||||
Age range: base of the Ypresian to the top of the Pleistocene or 56.00000 to 0.01170 Ma
Collections (65 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Ypresian | North Pacific | A. quadrata (270732) | |
| Lutetian | North Pacific | A. poagi (270710 271476 271477 271490 272251) A. quadrata (268631 271506 272231) A. quadrata, A. poagi (270709 272213 272229) | |
| Lutetian - Bartonian | North Pacific | A. quadrata (270720 271504 272250) A. quadrata, A. poagi (268630 272210) | |
| Bartonian | North Pacific | A. poagi (271487 272227) A. quadrata (272228 272247) | |
| Priabonian | North Pacific | A. quadrata (268600) | |
| Late/Upper Oligocene | South Pacific | A. spp. (260087 260088) | |
| Early/Lower Miocene | North Pacific | A. quadrata (261062 261066 261067 261070) | |
| Early/Lower Miocene - Middle Miocene | North Pacific | A. quadrata (261059) | |
| Middle Miocene | North Pacific | A. quadrata (261033 261037 261040 261041 261043 261044 261045 261046 261048 261050 261053 261054 261055 261056) | |
| Middle Miocene - Late/Upper Miocene | North Pacific | A. quadrata (261032 267851) | |
| Late/Upper Miocene | North Pacific | A. quadrata (260983 260991 260992 260993 260995 260997 260998 261000 261003 261005 261006 261009 261012 261014 261015 261018 261024) A. quadrata, A. poagi (261013) | |
| Late/Upper Miocene - Pliocene | North Pacific | A. quadrata (260980) | |
| Pleistocene | North Pacific | A. quadrata (260959) |