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Orthothetina planoconvexa
Taxonomy
Orthothetina planoconvexa was named by Hayasaka (1933). It is a 3D body fossil. Its type locality is Kadosawa Limestone quarries, Nabeyama, Tochigi Prefecture (Hayasaka coll), which is in a Roadian carbonate limestone in the Nabeyama Formation of Japan.
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1933 | Orthothetina planoconvexa Hayasaka p. 32 figs. Pl 7, fig 2; text-fig 5 |
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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.
†Orthothetina planoconvexa Hayasaka 1933
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Diagnosis
No diagnoses are available
Measurements
| part | N | mean | |||||
|---|---|---|---|---|---|---|---|
| shell height | 1 | 25.0 |
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| Source: c = class, p = phylum, uc = unranked clade | |||||
| References: Nesnidal et al. 2013, Aberhan et al. 2004 | |||||
Age range: base of the Roadian to the top of the Changhsingian or 274.40000 to 251.90200 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Roadian | Japan | Orthothetina planoconvexa (type locality: 125086) | |
| Changhsingian | China (Chongqing) | Orthothetina planoconvexa (94984) |