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Heminautilus japonicus
Taxonomy
Heminautilus japonicus was named by Baudouin et al. (2016). It is a 3D body fossil. Its type locality is Sa 203, Sanchu area, upper Ishido Formation, Gunma, which is in a Barremian coastal sandstone in the Ishido Formation of Japan.
Synonymy list
| Year | Name and author |
|---|---|
| 2016 | Heminautilus japonicus Baudouin et al. p. 90 figs. Pl 38, fig 2; pl 49, fig 2; pl 50, fig 3 |
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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.
†Heminautilus japonicus Baudouin et al. 2016
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Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 2 | 54.0 | 42.3 | 69.0 | 55.6 | 18.9 | |
| shell diameter | 2 | 88.8 | 74.4 | 106.0 | 90.2 | 22.3 | |
| shell inflation | 2 | 0.067 | 0.001 | 4.50 | 2.25 | 3.18 |
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| Source: o = order, c = class | |||||
| References: Kiessling 2004, Kiessling 2003 | |||||
Age range: Late/Upper Barremian or 125.77000 to 121.40000 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Barremian | Japan | Heminautilus japonicus (type locality: 66079 181259) |