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Cleiothyridina circularis
Taxonomy
Athyris circularis was named by Ustritsky (1960).
It was recombined as Cleiothyridina circularis by Chen and Shi (2006).
It was recombined as Cleiothyridina circularis by Chen and Shi (2006).
Sister species lacking formal opinion data
Synonymy list
Year | Name and author |
---|---|
1960 | Athyris circularis Ustritsky p. 81 figs. Pl 22, figs 6,7 |
1985 | Athyris circularis Jin and Fang figs. Pl 1, figs 9, 10 |
2006 | Cleiothyridina circularis Chen and Shi p. 28 figs. Pl 8, figs 14-34; text-figs 16-18 |
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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.
†Cleiothyridina circularis Ustritsky 1960
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Diagnosis
No diagnoses are available
Measurements
part | N | mean | minimum | maximum | median | s.d. | |
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shell height | 3 | 11.2 | 5.90 | 15.8 | 15.0 | 5.50 |
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Source: subo = suborder, c = class, p = phylum, uc = unranked clade | |||||
References: Nesnidal et al. 2013, Aberhan et al. 2004 |
Age range: base of the Artinskian to the top of the Kungurian or 290.10000 to 272.30000 Ma
Collections (16 total)
Time interval | Ma | Country or state | Original ID and collection number |
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Artinskian | China (Xinjiang) | Cleiothyridina circularis (35516 62817 62819 62820 62825 62826 62828) | |
Artinskian | China (Yunnan) | Athyris circularis (132457) | |
Kungurian | China (Xinjiang) | Cleiothyridina circularis (62737 62740 62742 62744 62745 62757 62808 62811) |