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Contraspina purdoni
Taxonomy
Productus purdoni was named by Davidson (1862).
It was recombined as Productus (Waagenoconcha) purdoni by Reed (1931), Chao (1931); it was recombined as Productus (Ruthenia) purdoni by Reed (1944); it was recombined as Waagenoconcha purdoni by Waterhouse (1966), Zhang and Jin (1976), Shimizu (1981); it was recombined as Contraspina purdoni by Waterhouse (2002).
It was recombined as Productus (Waagenoconcha) purdoni by Reed (1931), Chao (1931); it was recombined as Productus (Ruthenia) purdoni by Reed (1944); it was recombined as Waagenoconcha purdoni by Waterhouse (1966), Zhang and Jin (1976), Shimizu (1981); it was recombined as Contraspina purdoni by Waterhouse (2002).
Subspecies
Synonymy list
| Year | Name and author |
|---|---|
| 1862 | Productus purdoni Davidson p. 31 figs. Pl 2, fig 5 |
| 1865 | Productus purdoni Salter figs. Pl 5, fig 10 |
| 1884 | Productus purdoni Waagen p. 705 figs. Pl 73, figs 1-3 |
| 1897 | Productus purdoni Diener p. 21 figs. Pl 2, figs 1,2 |
| 1915 | Productus purdoni Diener p. 75 figs. Pl 8, figs 4,5 |
| 1931 | Productus (Waagenoconcha) purdoni Chao p. 297 figs. Pl 29, fig 4 |
| 1931 | Productus (Waagenoconcha) purdoni Reed p. 10 figs. Pl 3, figs 2,2a,2b |
| 1944 | Productus (Ruthenia) purdoni Reed p. 59 figs. Pl 11, fig 4; pl 14, figs 3-5 |
| 1966 | Waagenoconcha purdoni Waterhouse p. 23 figs. Pl 4, figs 2,3; pl 5, figs 2,3 |
| 1976 | Waagenoconcha purdoni Zhang and Jin p. 176 figs. Pl 5, figs 1-3,5,6 |
| 1981 | Waagenoconcha purdoni Shimizu p. 74 figs. Pl 8, figs 12-14 |
| 2002 | Contraspina purdoni Waterhouse |
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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.
†Contraspina purdoni Davidson 1862
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†Waagenoconcha purdoni circularis Reed 1944
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. B. Waterhouse 1966 | Large Waagenoconcha with moderately prominent little incurved massive ventral umbo, gently rounded shoulders and moderately deep sulcus; dorsal valve flat with low fold, spines with short elongated narrow bases. |
Measurements
| part | N | mean | |||||
|---|---|---|---|---|---|---|---|
| shell height | 1 | 23.0 | |||||
| valve height | 1 | 31.0 |
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| Source: subo = suborder, c = class, p = phylum, uc = unranked clade | |||||
| References: Aberhan et al. 2004, Williams et al. 2000, Nesnidal et al. 2013 | |||||
Age range: base of the Wordian to the top of the Changhsingian or 266.90000 to 251.90200 Ma
Collections (31 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Wordian | China (Nei Mongol) | Productus purdoni (109209) | |
| Wordian | Mongolia | Waagenoconcha purdoni (109034) | |
| Wordian - Capitanian | China (Heilongjiang) | Waagenoconcha purdoni (61875) | |
| Wuchiapingian | India | Productus purdoni (107358) | |
| Wuchiapingian | China (Xizang) | Waagenoconcha purdoni (110482 121583) | |
| Wuchiapingian | Pakistan | Productus purdoni (117776 119890 126276 126296 126459 127030 212247) | |
| Lopingian | India | Productus purdoni (230331 230337) | |
| Wuchiapingian - Changhsingian | Pakistan | Productus purdoni (117777 126748 126890) | |
| Changhsingian | Nepal | Waagenoconcha purdoni (43146 120443 120449) | |
| Changhsingian | India (Kashmir) | Waagenoconcha sp. (115369) | |
| Changhsingian | Pakistan | Productus purdoni (83145 89064 119554 119637 119677 127562) | |
| Changhsingian | China (Xizang) | Waagenoconcha purdoni (187558) | |
| Changhsingian - Griesbachian | India (Kashmir) | Waagenoconcha purdoni (50044 50045) |