Sphaeroidinellopsis seminulina ...
Sphaeroidinellopsis seminulina (Schwager 1866) 1866 Globigerina seminulina Schwager: fig. 142. 1959 Sphaeroidinella dehiscens subdehiscens Blow: pl. 12, fig. 71a–c. 1960 non Sphaeroidinellopsis disjuncta Banner & Blow: pl. 7, fig. 2. 2009 Sphaeroidinellopsis seminulina Hokuto, Ayayu, Toshiaki, H...
| Main Authors: | , , , |
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| Format: | Text |
| Language: | unknown |
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Zenodo
2021
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| Subjects: | |
| Online Access: | https://dx.doi.org/10.5281/zenodo.10960134 https://zenodo.org/doi/10.5281/zenodo.10960134 |
| Summary: | Sphaeroidinellopsis seminulina (Schwager 1866) 1866 Globigerina seminulina Schwager: fig. 142. 1959 Sphaeroidinella dehiscens subdehiscens Blow: pl. 12, fig. 71a–c. 1960 non Sphaeroidinellopsis disjuncta Banner & Blow: pl. 7, fig. 2. 2009 Sphaeroidinellopsis seminulina Hokuto, Ayayu, Toshiaki, Hayashi & Tanaka: 549, pl. 3, fig. 2a–c. Test morphology. Low trochospiral, compact, equatorial periphery broadly ovate to slightly trilobulate. The ultimate whorl presents three subglobular chambers, with sutures obscured by a heavy cortex. In umbilical view, the umbilicus is narrow with a low umbilical aperture bordered by a thickened crenulated rim (Kennett & Srinivasan 1983). In spiral view, previous chambers’ whorls tend to be hidden under the cortex. When visible, the sutures are straight and incised. In edge view, rounded margin and compact outline with a flat trochospire. Range. Tortonian (Zone M13)–Piacenzian (Zone PL 3). According to Kennett & Srinivasan (1983) this taxon appeared in the early ... : Published as part of Fabbrini, Alessio, Zaminga, Ilaria, Ezard, Thomas H. G. & Wade, Bridget S., 2021, Systematic taxonomy of middle Miocene Sphaeroidinellopsis (planktonic foraminifera), pp. 953-968 in Journal of Systematic Palaeontology 19 (13) on pages 958-959, DOI: 10.1080/14772019.2021.1991500, http://zenodo.org/record/10960117 ... |
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