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| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Tetrarhynchia viluensis
Taxonomy
Tetrarhynchia viluensis was named by Dagys (1968). Its type specimen is IGiG 369/78 and is a 3D body fossil. Its type locality is Vilyuy River, below mouth of Iligir River, which is in a Bifrons marine siliciclastic in the Russian Federation.
Synonymy list
| Year | Name and author |
|---|---|
| 1968 | Tetrarhynchia viluensis Dagys p. 81 figs. Pl 9, figs 2-5 |
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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.
†Tetrarhynchia viluensis Dagys 1968
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Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 3 | 9.86 | 8.00 | 12.0 | 10.0 | 2.00 |
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| Source: o = order, c = class, p = phylum, uc = unranked clade | |||||
| References: Aberhan et al. 2004, Nesnidal et al. 2013 | |||||
Age range: Middle Toarcian or 182.00000 to 175.60000 Ma
Collections (5 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Bifrons | Russian Federation | Tetrarhynchia viluensis (type locality: 135597) | |
| Middle Toarcian | Russian Federation | Tetrarhynchia viluensis (135594 135595 135596 135598) |