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| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Williamsonia sewardiana
Taxonomy
Williamsonia sewardiana was named by Sahni (1932). It is not extant. Its type locality is Amarjola, Rajmahal Hills, which is in a Jurassic fluvial horizon in the Rajmahal Formation of India.
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1932 | Williamsonia sewardiana Sahni |
| 1976 | Williamsonia sewardiana Lakhanpal et al. |
| 1991 | Williamsonia sewardiana Chandra and Tewari |
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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.
†Williamsonia sewardiana Sahni 1932
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Diagnosis
No diagnoses are available
Measurements
No measurements are available
No ecological data are available
Age range: Late/Upper Jurassic or 161.50000 to 145.00000 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Jurassic | India (Rajasthan) | Williamsonia sewardiana (30133) | |
| Late/Upper Jurassic | India (Jharkhand) | Williamsonia sewardiana (type locality: 224719) |