| Basic info | Taxonomic history | Classification | Included Taxa |
| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Globigerinoides subquadratus
Taxonomy
Globigerinoides subquadrata was named by Broenniman and Todd (1954). It is not extant.
It was corrected as Globigerinoides subquadratus by Kennett and Srinivasan (1983), Lam and Leckie (2020).
It was corrected as Globigerinoides subquadratus by Kennett and Srinivasan (1983), Lam and Leckie (2020).
Subspecies
Sister species lacking formal opinion data
G. altiapetura, G. bolli, G. conglobatus, G. cyclostoma, G. extremes, G. helicinus, G. hellcinus, G. impensus, G. obiquus, G. obliquus, G. quadrilobatus, G. quadrilobatus, G. quadrilobatus, G. rubber, G. subsacculifer, G. transitorius, G. altiapertura, G. diminutus, G. fistulosus, G. immaturus, G. kennetti, G. obliquus, G. parawoodi, G. praeprimordius, G. primordius, G. pyramidalis, G. quadrilobatus, G. rubescens, G. seiglei, G. seigliei, G. tenellus, G. triloba
Synonymy list
| Year | Name and author |
|---|---|
| 1954 | Globigerinoides subquadrata Broenniman and Todd |
| 1954 | Globigerinoides subquadrata Broennimann |
| 1983 | Globigerinoides subquadratus Kennett and Srinivasan p. 74 |
| 2020 | Globigerinoides subquadratus Lam and Leckie |
Is something missing? Join the Paleobiology Database and enter the data
|
|
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.
†Globigerinoides subquadratus Broenniman and Todd 1954
show all | hide all
†Globigerinoides subquadratus subelongatus Brönnimann and Resig 1971
show all | hide all
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| P. Broenniman and R. Todd 1954 | The general outline of the test is subquadrate. The major portion of the test is represented by the three-chambered final volution. The early portion of the test is distinctly trochoid. It is only slightly smaller than the antipenultimate chamber. The subglobular and appressed chambers of the final volution increase rapidly in size, and the end chamber is equal to or only slightly smaller than the preceding part of the test. The ultimate and penultimate chambers are added perpendicularly to the preceding oral face. The initial spiral is indistinct and the spiral side is much like the umbilical side. The umbilicus is very shallow. The arcuate main aperture is situated at the intersection of the umbilical sutures; the smaller. also arcuate. accessory aperture is opposite the main aperture on the spiral side. Additional accessory apertures of the early spiral are visible only in large and well-preserved specimens. The main aperture is bordered by large pustules. The well-defined sutures of the end stage are straight. Those of the initial stage are slightly curved. The walls are finely perforate and the surface is covered with strong and rather uniform pustules. The species coils to the right and to the left. The length of the test ranges from 0.35 mm to 0.6 mm. |