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Amphitetras antediluviana var. 'beta' W. Smith 1855, p. 8; pl. 1, fig. 11
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| Status | Invalid | |
| Comments | Improper epithet. Also in W. Smith 1856, p. 47, pl. 44, fig. 318 a’’’ (ref. 001007). Name possibly validated by Peragallo in Pelletan 1889, p. 223 (ref. 001001) as Amphitetras antediluviana var. 'beta' cruciformis. |
| Published in | Smith, W. 1855 [ref. 000864]. Notes of an excursion to the south of France and the Auvergne in Search of Diatomaceae. Annals and Magazine of Natural History, 2nd series, 15:1-9, pl. 1. |
| Type | | INA card not found. Click here to check this name in the INA website. |
| Type Locality | | Language of description | E |
| Collector | | Assessment of record accuracy | likely accurate |
| List of nomenclatural synonyms | Biddulphia antediluviana var. excavata Frenguelli 1945
Amphitetras excavata W. Smith 1855
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