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Nipponomaria yokoyamai
Taxonomy
Pleurotomaria yokoyamai was named by Hayasaka (1943). It is a 3D body fossil. Its type locality is Kinshozan, Kuro zone, Akasaka, Gifu Prefecture, which is in a Capitanian carbonate limestone in the Akasaka Formation of Japan.
It was recombined as Zhonghuaspira yokoyamai by Nützel and Nakazawa (2012); it was recombined as Nipponomaria yokoyamai by Asato and Kase (2016); it was recombined as Biarmeaspira yokoyamai by Mazaev (2017).
It was recombined as Zhonghuaspira yokoyamai by Nützel and Nakazawa (2012); it was recombined as Nipponomaria yokoyamai by Asato and Kase (2016); it was recombined as Biarmeaspira yokoyamai by Mazaev (2017).
Entered
by M. Clapham on 2012-02-28; modified by M. Clapham on 2013-10-27
Synonymy list
| Year | Name and author |
|---|---|
| 1943 | Pleurotomaria yokoyamai Hayasaka p. 28 figs. Pl 2, fig 1; text-fig 1 |
| 2012 | Zhonghuaspira yokoyamai Nützel and Nakazawa p. 111 figs. 8P,Q, 9A |
| 2014 | Pleurotomaria yokoyamai Isozaki and Kase p. 253 figs. 3A-C |
| 2016 | Nipponomaria yokoyamai Asato and Kase p. 386 figs. 1-5 |
| 2017 | Biarmeaspira yokoyamai Mazaev p. 231 |
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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.
†Nipponomaria yokoyamai Hayasaka 1943
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Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 8 | 98.0 | 26.0 | 180.0 | 110.0 | 47.1 | |
| shell diameter | 8 | 125.2 | 102.7 | 160.0 | 120.0 | 25.8 |
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| Source: f = family, o = order | |||||
| References: Hendy 2009, Bambach et al. 2007 | |||||
Age range: base of the Wordian to the top of the Capitanian or 266.90000 to 259.51000 Ma
Collections (6 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Wordian | Japan | Nipponomaria yokoyamai (181935) | |
| Capitanian | Japan | Nipponomaria yokoyamai (181934) Pleurotomaria yokoyamai (type locality: 109637 163387 163388) Zhonghuaspira yokoyamai (109667) |