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| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Discorbina
Taxonomy
Discorbina was named by Carpenter et al. (1862). It is extant. It was considered unknown by Carpenter et al. (1862).
It was assigned to Discorbidae by Carpenter et al. (1862).
It was assigned to Discorbidae by Carpenter et al. (1862).
Synonymy list
| Year | Name and author |
|---|---|
| 1862 | Discorbina Carpenter et al. p. 203 |
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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.
G. Discorbina Carpenter et al. 1862
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| W. B. Carpenter et al. 1862 | The genus Discorbina may be regarded as presenting the characteristic features of the Rotaline series in their simplest, as Rotalia does in their most developed, condition. Its shell is typically a turbinoid spire, formed by a succession of vesicular segments, every one of which bears a strong resemblance to a segment of Globigenrina; the only essential difference between the two types consisting in this, that each chamber of Globigerina has a distinct communication with the umbilical vestibule, whilst in Discorbina each chamber communicates only with that which precedes and follows it. The aperture is a large fissure, more or less arched, reaching to the lower edge of the umbilical margin of the septal plane; and it is nearly always more or less occluded by an "astral flap", which may be a mere projection of the exogenous substance deposited on the umbilicus, or may be part of the more developed "asterigerine" plates to be presently described. The general form of the shell is conical, with a rather sharp margin and a nearly flat base. |
Measurements
No measurements are available
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| Source: o = order | |||||
| Reference: Kiessling 2004 | |||||
Age range: base of the Late/Upper Cretaceous to the top of the Early/Lower Pleistocene or 100.50000 to 0.78100 Ma
Collections (3 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Cretaceous | South Africa | D. pileolus (38815) | |
| Lutetian | Nigeria | D. globularis, D. orbicularis, D. turbo (60711) | |
| Early/Lower Pleistocene | Panama | D. patelliformis (91912) |