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Taxonomy
Macrocallista ariakensis was named by Nagao (1928). It is a 3D body fossil. Its type locality is Mirokudake, which is in an Eocene marine horizon in Japan.
It was recombined as Callista (Microcallista) ariakensis by Matsubara and Ugai (2006).
It was recombined as Callista (Microcallista) ariakensis by Matsubara and Ugai (2006).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1928 | Macrocallista ariakensis Nagao p. 112 |
| 2006 | Callista (Microcallista) ariakensis Matsubara and Ugai |
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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.
†Callista (Microcallista) ariakensis Nagao 1928
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Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: f = family, c = class | |||||
| References: Kiessling 2004, Aberhan et al. 2004 | |||||
Age range: base of the Middle Eocene to the top of the Late/Upper Eocene or 47.80000 to 33.90000 Ma
Collections (8 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Paleogene | Japan (Nagasaki) | Macrocallista ariakensis (203223) | |
| Eocene | Japan (Chikugo) | Macrocallista ariakensis (203228) | |
| Middle Eocene | Japan | Callista ariakensis (71014 71015 71016 71017 71025) | |
| Late/Upper Eocene | Japan | Macrocallista ariakensis (203227) |