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| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Polyptychites (Polyptychites) rawsoni
Taxonomy
Polyptychites (Polyptychites) rawsoni was named by Alsen (2006) [DISTRIBUTION: Valanginian; Greenland.]. Its type specimen is MGUH 28094, a shell, and it is not a trace fossil.
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 2006 | Polyptychites (Polyptychites) rawsoni Alsen p. 88 figs. pl. 31, figs. P-S |
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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.
†Polyptychites (Polyptychites) rawsoni Alsen 2006
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Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 2 | 19.5 | 19.0 | 20.0 | 19.5 | 0.707 | |
| shell diameter | 2 | 47.5 | 47.0 | 48.0 | 47.5 | 0.707 | |
| shell inflation | 2 | 11.8 | 11.5 | 12.2 | 11.8 | 0.495 |
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| Source: o = order, c = class | |||||
| References: Kiessling 2003, Kiessling 2004 | |||||
Age range: Valanginian or 139.80000 to 132.90000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Valanginian | Greenland | Polyptychites rawsoni (83741) |