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Derbyella
Taxonomy
Derbyella was named by Grabau (1931) [Sepkoski's age data: P Wc Sepkoski's reference number: 1,538]. Its type is Derbyella bureri.
It was assigned to Scacchinellidae by Muir-Wood and Cooper (1960); to Scacchinellinae by Williams et al. (2000); and to Strophomenida by Sepkoski (2002).
It was assigned to Scacchinellidae by Muir-Wood and Cooper (1960); to Scacchinellinae by Williams et al. (2000); and to Strophomenida by Sepkoski (2002).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1931 | Derbyella Grabau p. 269 |
| 1960 | Derbyella Muir-Wood and Cooper p. 131 |
| 2000 | Derbyella Williams et al. p. 608 |
| 2002 | Derbyella Sepkoski |
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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.
G. †Derbyella Grabau 1931
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†Derbyella bureri Grabau 1931
†Derbyella jalaidensis Lee and Gu 1980
†Derbyella kanmerai Yanagida 1967
†Derbyella minor Grabau 1931
†Derbyella subrotunda Grabau 1931
Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 2 | 9.75 | 7.60 | 12.5 | 10.1 | 3.46 |
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| Source: subo = suborder, c = class, p = phylum, uc = unranked clade | |||||
| References: Williams et al. 2000, Nesnidal et al. 2013, Aberhan et al. 2004 | |||||
Age range: base of the Asselian to the top of the Changhsingian or 298.90000 to 251.90200 Ma
Collections (5 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Asselian | Thailand | D. kanmerai (120945) | |
| Wordian | China (Nei Mongol) | D. bureri (109257) D. bureri, D. subrotunda, D. minor (109180) D. jalaidensis (111138) | |
| Changhsingian | China (Xizang) | D. sp. (203184) |