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Sphenodiscus pleurisepta
Taxonomy
Ammonites pleurisepta was named by Conrad (1857) [DISTRIBUTION: Maastrichtian; Atlantic and Gulf Coastal Plains.]. It is a 3D body fossil.
It was recombined as Sphenodiscus pleurisepta by Hyatt (1903), Böse (1928), Reyment (1955), Kennedy et al. (1996), Kennedy et al. (1997) and Landman and Cobban (2003).
It was recombined as Sphenodiscus pleurisepta by Hyatt (1903), Böse (1928), Reyment (1955), Kennedy et al. (1996), Kennedy et al. (1997) and Landman and Cobban (2003).
Synonymy list
| Year | Name and author |
|---|---|
| 1857 | Ammonites pleurisepta Conrad p. 159 figs. pl. 15, fig. 1 |
| 1903 | Sphenodiscus pleurisepta Hyatt p. 59 figs. PI.III.tio-^.7-15:PI.IV:PI.V.tigs.1-3:PI.VI.tig.6 |
| 1928 | Sphenodiscus pleurisepta Böse p. 304 |
| 1955 | Sphenodiscus pleurisepta Reyment p. 89 fig. 44b,c |
| 1996 | Sphenodiscus pleurisepta Kennedy et al. p. 11 figs. 4A, 5-12 |
| 1997 | Sphenodiscus pleurisepta Kennedy et al. p. 9 |
| 2003 | Sphenodiscus pleurisepta Landman and Cobban p. 17 figs. 12-15 |
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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.
†Sphenodiscus pleurisepta Conrad 1857
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Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 3 | 60.2 | 51.4 | 74.2 | 57.1 | 11.9 | |
| shell diameter | 3 | 106.0 | 92.2 | 131.1 | 98.4 | 20.9 | |
| shell inflation | 3 | 5.46 | 5.20 | 5.80 | 5.40 | 0.306 |
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| Source: o = order, c = class | |||||
| References: Kiessling 2003, Kiessling 2004 | |||||
Age range: base of the Late/Upper Maastrichtian to the top of the Early/Lower Maastrichtian or 70.60000 to 66.00000 Ma
Collections (61 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Maastrichtian | USA (Texas) | Sphenodiscus pleurisepta (4528 4548 4556 4559 4563 4582 4584 4588 4593 4601 4605 4608 4609 4611 4616 4621 4626 4627 4628 4629 4630 4631 4633 4636 7489) | |
| Early/Lower Maastrichtian | USA (Mississippi) | Sphenodiscus pleurisepta (4099 4100 4118) | |
| Late/Upper Maastrichtian | Mexico (Coahuila de Zaragoza) | Sphenodiscus pleurisepta (88246 88247) | |
| Late/Upper Maastrichtian | USA (South Dakota) | Sphenodiscus pleurisepta (178315) | |
| Late/Upper Maastrichtian | USA (Texas) | Sphenodiscus pleurisepta (4398 4401 4421 4423 4431 4506 4520 4536 4632) | |
| Late/Upper Maastrichtian | USA (Maryland) | Sphenodiscus pleurisepta (82408) | |
| Late/Upper Maastrichtian | USA (Colorado) | Sphenodiscus pleurisepta (178285 178286 178287 178288 178312) | |
| Late/Upper Maastrichtian | USA (Wyoming) | Sphenodiscus pleurisepta (178307 178310 178311 178313 178314) | |
| Late/Upper Maastrichtian | USA (Mississippi) | Sphenodiscus pleurisepta (4123 4125 4127 4137 4160 4163 4164 4165) | |
| Late/Upper Maastrichtian | USA (Missouri) | Sphenodiscus pleurisepta (205794) | |
| Late/Upper Maastrichtian | USA (Alabama) | Sphenodiscus pleurisepta (83238) |