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Spirovallum
Taxonomy
Spirovallum was named by Waterhouse (1963). Its type is Spirovallum liratum.
It was assigned to Phymatopleuridae by Waterhouse (1963); to Eotomariidae by Waterhouse and Chen (2006); and to Gosseletininae by Wagner (2023).
It was assigned to Phymatopleuridae by Waterhouse (1963); to Eotomariidae by Waterhouse and Chen (2006); and to Gosseletininae by Wagner (2023).
Species
S. fasciatum, S. liratum (type species)
Synonymy list
| Year | Name and author |
|---|---|
| 1963 | Spirovallum Waterhouse p. 605 |
| 2006 | Spirovallum Waterhouse and Chen p. 90 |
| 2023 | Spirovallum Wagner p. G1643 |
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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. †Spirovallum Waterhouse 1963
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†Spirovallum fasciatum Waterhouse 1963
†Spirovallum liratum Waterhouse 1963
Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 3 | 17.9 | 16.5 | 20.5 | 17.0 | 2.18 | |
| shell diameter | 3 | 14.8 | 13.5 | 17.0 | 14.0 | 1.89 |
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| Source: f = family, o = order | |||||
| References: Bambach et al. 2007, Hendy 2009 | |||||
Age range: base of the Sakmarian to the top of the Changhsingian or 293.52000 to 252.17000 Ma
Collections (7 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Sakmarian | Canada (Yukon) | S. sp. (121747) | |
| Artinskian | New Zealand (Southland) | S. fasciatum (41773) | |
| Changhsingian | New Zealand | S. sp. (120424) | |
| Changhsingian | Nepal | S. sp. (62451 120519 120520) | |
| Changhsingian | New Zealand (Southland) | S. liratum (41786) |