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Gansserina
Taxonomy
Gansserina was named by Bolli (1951) [Sepkoski's age data: K Maes-l K Maes-u]. It was considered unknown by Loeblich and Tappan (1988).
It was assigned to Globotruncanidae by Loeblich and Tappan (1988); to Foraminiferida by Sepkoski (2002); and to Globotruncaninae by Hayward et al. (2022).
It was assigned to Globotruncanidae by Loeblich and Tappan (1988); to Foraminiferida by Sepkoski (2002); and to Globotruncaninae by Hayward et al. (2022).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1951 | Gansserina Bolli |
| 1988 | Gansserina Loeblich and Tappan |
| 2002 | Gansserina Sepkoski |
| 2022 | Gansserina Hayward 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.
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. R. Loeblich and H. Tappan 1988 | Test.- A very low trochospire with a flat spiral side and a convex umbilical side. Primary aperture umbilical. Umbilicus about ⅓ of the maximum diameter. Umbilical system composed of portici bordering the successive apertures, leaving proximal accessory apertures, and sometimes composed of tegilla towards the end of the whorl. Chamber profile with one or two moderately developed keels, the keel on the umbiilical side generally less developed or reduced to a row of pustules parallel to the keel situated on the spiral side, or absent. Chamber surface pustulose on the umbilical side, except sometimes towards the end of the last whorl; slightly pustulose on the spiral side; initial chambers typically globular on the spiral side. Sutures depressed, more or less radial on the umbilical side; curved and variably raised on the spiral side. Peripheral outline sub-circular, slightly lobate. |
Measurements
No measurements are available
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| Source: subo = suborder, o = order | |||||
| References: Loeblich and Tappan 1984, Kiessling 2004 | |||||
Age range: base of the Early/Lower Maastrichtian to the top of the Early/Lower Paleocene or 72.20000 to 61.66000 Ma
Collections (39 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Campanian - Early/Lower Paleocene | Türkiye (Aydin) | G. gansseri (162810) | |
| Late/Upper Campanian - Late/Upper Paleocene | Türkiye (Aydin) | G. gansseri (162808) | |
| Early/Lower Maastrichtian | Mexico (Chiapas) | G. gansseri (64439) | |
| Early/Lower Maastrichtian | Egypt | G. gansseri (240611 240616 240618 240622) | |
| Late/Upper Maastrichtian | Mexico (Guerrero) | G. gansseri (7463) | |
| Late/Upper Maastrichtian | Germany (Bayern) | Globotruncana gansseri (67197) | |
| Late/Upper Maastrichtian | Egypt | G. gansseri (240605 240606) | |
| Maastrichtian | Egypt | G. gansseri (240630 240631) | |
| Maastrichtian | Tunisia | G. wiedenmayeri (57391 57392 57393 57395 57396 57397 57399 57400 57402 57403 57404 57405 57428 57430 57432 57433) | |
| Maastrichtian | Greece | G. gansseri (64302) | |
| Danian | Egypt | G. gansseri (57295 57296 57298 57300 57301 57304 57305 57306 57307) |