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Arctitreta triangularis
Taxonomy
Streptorhynchus triangularis was named by Wiman (1914).
It was recombined as Arctitreta triangularis by Kalashnikov (1993).
It was recombined as Arctitreta triangularis by Kalashnikov (1993).
Synonymy list
| Year | Name and author |
|---|---|
| 1914 | Streptorhynchus triangularis Wiman p. 55 figs. Pl 10, fig 1-19,28,29 |
| 1960 | Streptorhynchus triangularis Harker p. 51 figs. Pl 15, figs 7-9 |
| 1993 | Arctitreta triangularis Kalashnikov p. 21 figs. pl 5, figs 4,5 |
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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.
†Arctitreta triangularis Wiman 1914
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Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 2 | 16.9 | 15.0 | 19.0 | 17.0 | 2.83 |
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| Source: c = class, p = phylum, uc = unranked clade | |||||
| References: Nesnidal et al. 2013, Aberhan et al. 2004 | |||||
Age range: base of the Artinskian to the top of the Roadian or 290.10000 to 266.90000 Ma
Collections (4 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Artinskian | Svalbard and Jan Mayen | Streptorhynchus triangularis (212503) | |
| Kungurian | Russian Federation | Arctitreta triangularis (110007 110111) | |
| Roadian | Canada (Nunavut) | Streptorhynchus triangularis (11089) |