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Trilobatus primordius
Taxonomy
Globigerinoides primordius was named by Blow and Banner (1962). It is not extant.
It was recombined as Trilobatus primordius by Spezzaferri et al. (2018).
It was recombined as Trilobatus primordius by Spezzaferri et al. (2018).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1962 | Globigerinoides primordius Blow and Banner p. 15 |
| 2018 | Trilobatus primordius Spezzaferri 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.
†Trilobatus primordius Blow and Banner 1962
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| W. H. Blow and F. T. Banner 1962 | Test low trochospiral, equatorial profile elongate, three and a half to four chambers in the final whorl, increasing rapidly in size as added; sutures of the spiral and umbilical sides depressed, radial to slightly curved; surface on the final chamber finely hispid with short spines representing spine bases between the pores. Umbilicus small; primary aperture a low to moderate arch, interiomarginal, umbilical. A single small, supplementary aperture on spiral side. |