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| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Sphaeroidothyris obesum
Taxonomy
Pionopleurum obesum was named by Cooper (1989). It is not extant. Its type locality is Jebel Balaidiyah, S1446, which is in a Callovian shallow subtidal limestone in the Tuwaiq Mountain Formation of Saudi Arabia. It is the type species of Pionopleurum.
It was recombined as Sphaeroidothyris obesum by Williams et al. (2006).
It was recombined as Sphaeroidothyris obesum by Williams et al. (2006).
Synonymy list
| Year | Name and author |
|---|---|
| 1989 | Pionopleurum obesum Cooper |
| 2006 | Sphaeroidothyris obesum Williams et al. |
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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.
†Sphaeroidothyris obesum Cooper 1989
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Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 3 | 22.1 | 18.0 | 28.0 | 21.4 | 5.08 |
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| Source: f = family, c = class, p = phylum, uc = unranked clade | |||||
| References: Aberhan et al. 2004, Nesnidal et al. 2013 | |||||
Age range: Callovian or 166.10000 to 163.50000 Ma
Collections (4 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Bajocian - Callovian | Saudi Arabia | Pionopleurum obesum (98959 99105) | |
| Bathonian - Callovian | Saudi Arabia | Pionopleurum obesum (99106) | |
| Callovian | Saudi Arabia | Pionopleurum obesum (type locality: 98758) |