Trilobatus Spezzaferri, Kucera, Pearson, Wade, Rappo, Poole, Morard & Stalder 2015 ...
Genus Trilobatus Spezzaferri, Kucera, Pearson, Wade, Rappo, Poole, Morard, & Stalder, 2015 Type species. Globigerina triloba Reuss, 1850. Diagnosis. Type of wall: normal perforate, spinose, coarsely cancellate ‘ sacculifer -type’ wall texture, though commonly obscured by a heterogeneous secondar...
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| Format: | Text |
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Zenodo
2019
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| Online Access: | https://dx.doi.org/10.5281/zenodo.10932441 https://zenodo.org/doi/10.5281/zenodo.10932441 |
| Summary: | Genus Trilobatus Spezzaferri, Kucera, Pearson, Wade, Rappo, Poole, Morard, & Stalder, 2015 Type species. Globigerina triloba Reuss, 1850. Diagnosis. Type of wall: normal perforate, spinose, coarsely cancellate ‘ sacculifer -type’ wall texture, though commonly obscured by a heterogeneous secondary, ‘gametogenic’ calcite. Test morphology: test low trochospiral, three to four usually globose, near-spherical chambers in the final whorl, generally high chamber expansion rate; sutures distinct, depressed, slightly straight to curved on both sides; umbilicus typically narrow; primary aperture usually extraumbilical-umbilical, generally a low arch, numerous apertures on spiral side, one per chamber, placed at the sutures of the preceding chamber and third-previous chamber (see Spezzaferri et al. 2015 for further detail). Remarks. Trilobatus is discerned from its ancestor Globoturborotalita Hofker, 1976 by possessing one or more supplementary apertures on the spiral side. Globigerinoides Cushman, 1927 also ... : Published as part of Poole, Christopher R. & Wade, Bridget S., 2019, Systematic taxonomy of the Trilobatus sacculifer plexus and descendant Globigerinoidesella fistulosa (planktonic foraminifera), pp. 1989-2030 in Journal of Systematic Palaeontology 17 (23) on page 1999, DOI: 10.1080/14772019.2019.1578831, http://zenodo.org/record/10883327 ... |
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