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Spirelytha petaliformis
Taxonomy
Kitakamithyris petaliformis was named by Pavlova (1973). Its type specimen is PIN 2774/174, a shell (Articulated shell), and it is a 3D body fossil. Its type locality is Kastanat-Djilga 1, Bazardarin Fm, which is in a Sakmarian coastal siltstone in the Bazardarin Formation of Tajikistan.
It was recombined as Spirelytha petaliformis by Shi and Waterhouse (1991), Angiolini (1995), Shen et al. (2000), Shi et al. (2001), Mohd Shafeea Leman (2003) and Angiolini et al. (2005).
It was recombined as Spirelytha petaliformis by Shi and Waterhouse (1991), Angiolini (1995), Shen et al. (2000), Shi et al. (2001), Mohd Shafeea Leman (2003) and Angiolini et al. (2005).
Synonymy list
| Year | Name and author |
|---|---|
| 1973 | Kitakamithyris petaliformis Pavlova p. 136 figs. Pl 10, figs 2-5; text-fig 38,39 |
| 1991 | Spirelytha petaliformis Shi and Waterhouse p. 36 figs. 5.9-5.12,5.14,5.15 |
| 1995 | Spirelytha petaliformis Angiolini p. 200 |
| 2000 | Spirelytha petaliformis Shen et al. p. 274 figs. Pl 4, figs 4-8 |
| 2001 | Spirelytha petaliformis Shi et al. figs. Pl 1, fig 3 |
| 2003 | Spirelytha petaliformis Mohd Shafeea Leman figs. 4I-J |
| 2005 | Spirelytha petaliformis Angiolini et al. p. 82 |
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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.
†Spirelytha petaliformis Pavlova 1973
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Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 4 | 14.7 | 7.00 | 23.0 | 17.6 | 7.61 |
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| Source: o = order, c = class, p = phylum, uc = unranked clade | |||||
| References: Nesnidal et al. 2013, Aberhan et al. 2004 | |||||
Age range: base of the Asselian to the top of the Artinskian or 298.90000 to 279.30000 Ma
Collections (11 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Asselian | Pakistan | Spirelytha petaliformis (50590 50669 123826) | |
| Asselian | China (Yunnan) | Spirelytha petaliformis (61505) | |
| Sakmarian | Tajikistan | Kitakamithyris petaliformis (type locality: 100332) | |
| Sakmarian | Malaysia | Spirelytha petaliformis (82630 117676 221708) | |
| Sakmarian | China (Yunnan) | Spirelytha petaliformis (61511 61512) | |
| Artinskian | Thailand | Spirelytha petaliformis (117765) |