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Spinifrons
Taxonomy
Spinifrons was named by Stehli (1954) [Sepkoski's age data: P Sakm-u P Leon-m Sepkoski's reference number: 7]. Its type is Spinifrons quadratus.
It was assigned to Tolmatchoffiini by Williams et al. (2000); and to Strophomenida by Sepkoski (2002).
It was assigned to Tolmatchoffiini by Williams et al. (2000); and to Strophomenida by Sepkoski (2002).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1954 | Spinifrons Stehli p. 318 |
| 2000 | Spinifrons Williams et al. p. 502 |
| 2002 | Spinifrons Sepkoski |
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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. †Spinifrons Stehli 1954
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†Spinifrons delicatula Cooper and Grant 1975
†Spinifrons grandicosta Hoover 1981
†Spinifrons magna Cooper and Grant 1975
†Spinifrons planoconvexa Waterhouse 1981
†Spinifrons quadrata Stehli 1954
Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 5 | 25.0 | 17.2 | 34.0 | 25.0 | 7.39 |
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| Source: subo = suborder, c = class, p = phylum, uc = unranked clade | |||||
| References: Aberhan et al. 2004, Nesnidal et al. 2013, Williams et al. 2000 | |||||
Age range: base of the Artinskian to the top of the Capitanian or 290.10000 to 259.51000 Ma
Collections (26 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Artinskian | USA (Texas) | S. delicatula (102613) | |
| Artinskian - Kungurian | USA (Texas) | S. delicatula (75929) | |
| Kungurian | Venezuela (Merida) | S. grandicosta (41507 41508 41514 41516 41517) | |
| Kungurian | USA (Texas) | S. magna (75865 81635 81637 81726 81848 81950) S. magna, S. quadrata (75881) S. quadrata (75863 75864 102627) S. quadratus (81710 81724 81860 81862) S. sp. (43566) | |
| Kungurian | Thailand | S. planoconvexa (117142 221705 221706) | |
| Capitanian | Malaysia (Pahang) | S. sp. (42725) |