| WebNameShort | |
| Anaulus laevis (Grunow in Van Heurck) Boyer 1900 |
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| Biddulphia acuta (Ehrenberg) Boyer 1900 |
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| Biddulphia americana (Ralfs in Pritchard) Boyer 1900 |
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| Biddulphia antillarum (Cleve) Boyer 1900 |
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| Biddulphia arctica (Brightwell) Boyer 1900 |
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| Biddulphia arctica var. californica (Grunow in Schmidt et al.) Boyer 1900 |
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| Biddulphia arctica var. campeachiana (Grunow in Van Heurck) Boyer 1900 |
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| Biddulphia arctica var. kerguelensis (Grunow in Cleve & Grunow) Boyer 1900 |
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| Biddulphia arctica var. montereyi (Brightwell) Boyer 1900 |
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| Biddulphia arctica var. pentagona Boyer 1900 |
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| Biddulphia arctica var. quadrangularis (Greville) Boyer 1900 |
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| Biddulphia arctica var. sexangulata Boyer 1900 |
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| Biddulphia biddulphiana (J.E. Smith) Boyer 1900 |
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| Biddulphia biquadrata (Janisch in Schmidt et al.) Boyer 1900 |
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| Biddulphia californica (Schmidt) Boyer 1900 |
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| Biddulphia campeachiana (Grunow) Boyer 1900 |
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| Biddulphia condecora (Ehrenberg) Boyer 1900 |
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| Biddulphia consimilis (Grunow in Van Heurck) Boyer 1900 |
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| Biddulphia convexiuscula (Grunow in Schmidt et al.) Boyer 1900 |
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| Biddulphia costulata (Grunow in Schmidt et al.) Boyer 1900 |
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