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Ringsteadia sphenoidea
Taxonomy
Ringsteadia sphenoidea was named by Buckman (1926). Its type specimen is NHM C41691 and is a 3D body fossil. Its type locality is Wootton Bassett (Marston Ironstone, BMNH), which is in an Oxfordian carbonate limestone in the Ampthill Clay Formation of the United Kingdom.
Synonymy list
| Year | Name and author |
|---|---|
| 1926 | Ringsteadia sphenoidea Buckman figs. Pl 672 |
| 2010 | Ringsteadia sphenoidea Wright p. 28 figs. Pl 2, fig 9; text-fig 5C |
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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.
†Ringsteadia sphenoidea Buckman 1926
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Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 2 | 79.7 | 77.8 | 81.6 | 79.7 | 2.69 | |
| shell diameter | 2 | 166.0 | 162.0 | 170.0 | 166.0 | 5.66 | |
| shell inflation | 2 | 28.2 | 27.2 | 29.2 | 28.2 | 1.41 |
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| Source: o = order, c = class | |||||
| References: Kiessling 2003, Kiessling 2004 | |||||
Age range: Late/Upper Oxfordian or 157.90000 to 154.80000 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Oxfordian | United Kingdom (Wiltshire) | Ringsteadia sphenoidea (type locality: 163926 163930) |