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| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Opisthotrigonia retrorsa
Taxonomy
Trigonia retrorsa was named by Kitchin (1903). It is not extant. It is the type species of Opisthotrigonia.
It was recombined as Opisthotrigonia retrorsa by Cox (1952).
It was recombined as Opisthotrigonia retrorsa by Cox (1952).
Synonymy list
| Year | Name and author |
|---|---|
| 1903 | Trigonia retrorsa Kitchin |
| 1952 | Opisthotrigonia retrorsa Cox |
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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.
†Opisthotrigonia retrorsa Kitchin 1903
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Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: o = order, c = class | |||||
| Reference: Aberhan et al. 2004 | |||||
Age range: base of the Late/Upper Tithonian to the top of the Berriasian or 150.80000 to 139.80000 Ma
Collections (3 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Tithonian | India (Gujarat) | Opisthotrigonia retrorsa (64623) | |
| Late/Upper Tithonian | India (Gujarat) | Opisthotrigonia retrorsa (66780) | |
| Berriasian | India (Gujarat) | Opisthotrigonia retrorsa (64624) |