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Spirodela
Taxonomy
Spirodela was named by Schleiden (1839). It is extant.
It was reranked as Lemna (Spirodela) by Dawson (1875).
It was assigned to Lemna by Dawson (1875); and to Lemnaceae by Knowlton (1919), McIver and Basinger (1993).
It was reranked as Lemna (Spirodela) by Dawson (1875).
It was assigned to Lemna by Dawson (1875); and to Lemnaceae by Knowlton (1919), McIver and Basinger (1993).
Species
Species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1839 | Spirodela Schleiden |
| 1875 | Lemna (Spirodela) Dawson |
| 1919 | Spirodela Knowlton |
| 1993 | Spirodela McIver and Basinger |
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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.
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: p = phylum | |||||
| Reference: Kiessling 2009 | |||||
Age range: base of the Maastrichtian to the top of the Lostcabinian or 72.20000 to 51.10000 Ma
Collections (4 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Maastrichtian | Canada (Alberta) | S. acutata (35246) | |
| Graybullian | USA (Wyoming) | S. magna (11360) | |
| Lostcabinian | USA (Wyoming) | S. magna (11485) | |
| Early/Lower Eocene | USA (Wyoming) | S. magna (11393) |