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Taxonomy
Papiliophyllum elegantulum was named by Stumm (1937). Its type specimen is USNM 94448 and is a 3D body fossil.
Synonymy list
| Year | Name and author |
|---|---|
| 1937 | Papiliophyllum elegantulum Stumm p. 430 figs. Pl. 53, fig. 7; Pl. 54, figs. 7a - e |
| 1974 | Papiliophyllum elegantulum Merriam pp. 50 - 51 figs. Plate 7, figures 4-10; plate 8, figures 1-8 |
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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.
†Papiliophyllum elegantulum Stumm 1937
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| C. W. Merriam 1974 | This is a large Papiliophyllum. The width of the mature lonsdaleioid dissepimentarium is less than half the radius and consists of three to seven columns of medium to large, steeply inclined dissepi- ments. Some tabulae are complete, arched distally. They are usually flattened axially and periaxially in the ephebic stages and commonly are arched more deeply and rather irregularly in the neanic stages. In advanced ephebic stages the dissepimentarium is nar- rowest at the cardinal fossula; the thickened septa bounding the fossula invade this peripheral band. Minor septa are weakly developed or unrecognizable. Septa of the cardinal quadrants are heavily to mod- erately thickened in the ephebic stages. |
Measurements
No measurements are available
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| Source: o = order, c = class | |||||
| Reference: Kiessling 2004 | |||||
Age range: Late/Upper Emsian or 399.50000 to 393.47000 Ma
Collections (4 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Emsian | USA (California) | Papiliophyllum elegantulum (225991 225992) | |
| Late/Upper Emsian | USA (California) | Papiliophyllum elegantulum (225967 225995) |