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Triadithyris
Taxonomy
Triadithyris was named by Dagys (1963) [Sepkoski's age data: Tr Nori Tr Rhae Sepkoski's reference number: 434]. It is not extant. It is the type genus of Triadithyrididae.
It was assigned to Terebratulida by Sepkoski (2002); and to Triadithyrididae by Williams et al. (2006).
It was assigned to Terebratulida by Sepkoski (2002); and to Triadithyrididae by Williams et al. (2006).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1963 | Triadithyris Dagys p. 187 |
| 2002 | Triadithyris Sepkoski |
| 2006 | Triadithyris Williams et al. p. 2089 |
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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. †Triadithyris Dagys 1963
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†Triadithyris gregariaeformis Zugmayer 1882
†Triadithyris qabdoensis Sun 1981
Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 8 | 10.8 | 7.44 | 19.0 | 10.4 | 3.63 |
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| Source: f = family, c = class, p = phylum, uc = unranked clade | |||||
| References: Aberhan et al. 2004, Nesnidal et al. 2013 | |||||
Age range: base of the Carnian to the top of the Late/Upper Triassic or 237.00000 to 201.40000 Ma
Collections (27 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Carnian | China (Sichuan) | T. gregariaformis (132568) | |
| Late/Upper Triassic | Russian Federation | T. gregariaformis (127942) | |
| Norian | Russian Federation | T. gregariaformis (127967 127968 128046 128096 128098) | |
| Norian | Russian Federation (Republic of Adygea) | T. gregariaformis (127978) | |
| Norian - Rhaetian | Russian Federation (Republic of Adygea) | T. gregariaformis (127975) | |
| Norian - Rhaetian | Russian Federation | T. gregariaformis (127944 128266 128267) | |
| Norian - Rhaetian | Tajikistan | T. gregariaformis (127943 127974 128271) | |
| Alaunian | China (Xizang) | T. qabdoensis (44336) | |
| Rhaetian | Austria | Terebratula gregariaeformis (137754 138170) T. gregariaeformis (29069 29070 29071 115317 115348 137774 137776) | |
| Rhaetian | Slovakia | T. gregariaeformis (49455 137775) |