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| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Dielasma minor
Taxonomy
Dielasma minor was named by Waagen (1882). It is not a trace fossil. Its type locality is Amb, "Chonetes Bed", Salt Range, which is in a Wordian coastal sandstone in the Amb Formation of Pakistan.
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1882 | Dielasma minor Waagen p. 346 figs. Pl 25, fig 12 |
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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.
†Dielasma minor Waagen 1882
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Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 2 | 6.23 | 3.70 | 10.5 | 7.10 | 4.81 |
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| Source: o = order, c = class, p = phylum, uc = unranked clade | |||||
| References: Aberhan et al. 2004, Nesnidal et al. 2013 | |||||
Age range: base of the Wordian to the top of the Changhsingian or 266.90000 to 252.17000 Ma
Collections (5 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Wordian | Pakistan | Dielasma minor (type locality: 81501) | |
| Wordian | Oman | Dielasma minor (63777) | |
| Capitanian | Pakistan | Dielasma minor (125882) | |
| Changhsingian | China (Chongqing) | Dielasma minor (149277 149278) |