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Derbyia hemisphaerica
Taxonomy
Derbyia hemisphaerica was named by Waagen (1884).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1884 | Derbyia hemisphaerica Waagen p. 604 figs. Pl 54, figs 1-3 |
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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.
†Derbyia hemisphaerica Waagen 1884
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Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 2 | 30.0 | 30.0 | 30.0 | 30.0 | - |
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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 Wordian to the top of the Changhsingian or 266.90000 to 252.17000 Ma
Collections (51 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Wordian | China (Nei Mongol) | Derbyia hemisphaerica (109209) | |
| Wuchiapingian | Pakistan | Derbyia hemisphaerica (119890 125912 125913 125915 125928 126265 126273 126343 126692 126698 126699 126738 126881 126895 126932 126936 126937 126938 126939 126940 126941 126994 127007 127024) Streptorhynchus robusta (117780) | |
| Wuchiapingian - Changhsingian | Pakistan | Derbyia hemisphaerica (126700 126701 126703 126704 126706 126743 126746 126752 126753 126982 127014 127017) | |
| Changhsingian | Pakistan | Derbyia hemisphaerica (89064 90251 119608 119637 125352 125353 126882 126897 126898 126933 126980 126996) | |
| Changhsingian | Japan | Derbyia hemisphaerica (117839) |