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Pachycrommium nagaoi
Taxonomy
Ampullina nagaoi was named by Hatai and Nisiyama (1952) [DISTRIBUTION: Oligocenr; Japan.]. It is not a trace fossil.
It was recombined as Pachycrommium nagaoi by Majima (1989).
It was recombined as Pachycrommium nagaoi by Majima (1989).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1952 | Ampullina nagaoi Hatai and Nisiyama p. 167 |
| 1989 | Pachycrommium nagaoi Majima p. 31 |
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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.
†Pachycrommium nagaoi Hatai and Nisiyama 1952
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Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: superf = superfamily, c = class | |||||
| References: Kiessling 2004, Hendy et al. 2009 | |||||
Age range: Early/Lower Oligocene or 33.90000 to 27.30000 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Early/Lower Oligocene | Japan | Pachycrommium nagaoi (78399) | |
| Rupelian | Japan (Saga) | Ampullina nagaoi (204551) |