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Tompophiceras extremum
Taxonomy
Glyptophiceras extremum was named by Spath (1935). It is a 3D body fossil. Its type locality is Cape Stosch, river 10, locality 691, which is in a Griesbachian marine siliciclastic in the Wordie Creek Formation of Greenland.
It was recombined as Tompoites extremum by Ermakova (1977); it was recombined as Tompophiceras extremum by Tozer (1969), Bychkov et al. (1976) and Tozer (1994).
It was recombined as Tompoites extremum by Ermakova (1977); it was recombined as Tompophiceras extremum by Tozer (1969), Bychkov et al. (1976) and Tozer (1994).
Sister species lacking formal opinion data
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1935 | Glyptophiceras subextremum Spath p. 56 figs. Pl 5, fig 6; pl 6, fig 4 |
| 1935 | Glyptophiceras extremum Spath p. 57 figs. Pl 11, fig 4; pl 18, fig 4; pl 19, figs 7a-c |
| 1969 | Tompophiceras extremum Tozer p. 353 figs. Pl 16, figs g-j |
| 1976 | Tompophiceras extremum Bychkov et al. |
| 1977 | Tompoites extremum Ermakova |
| 1977 | Tompoites subextremum Ermakova |
| 1994 | Tompophiceras extremum Tozer p. 49 figs. Pl 3, figs 1-6 |
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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.
†Tompophiceras extremum Spath 1935
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Invalid names: Glyptophiceras subextremum Spath 1935 [synonym]
Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 7 | 14.5 | 11.0 | 19.0 | 15.0 | 5.66 | |
| shell diameter | 7 | 57.6 | 41.7 | 72.5 | 62.0 | 11.0 |
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| Source: o = order, c = class | |||||
| References: Kiessling 2004, Kiessling 2003 | |||||
Age range: Griesbachian or 251.90200 to 250.50000 Ma
Collections (12 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Griesbachian | Russian Federation | Tompophiceras extremum (214748) | |
| Griesbachian | Greenland | Glyptophiceras extremum (118651 118690 type locality: 118778) Glyptophiceras subextremum (118525 118682 118757) Tompophiceras extremum (112751) | |
| Griesbachian | Canada (Nunavut) | Tompophiceras extremum (47940 47950 47955 137953) |