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Beraunia bifrons
Taxonomy
Rhabdospira bifrons was named by Perner (1903) [Rhabdospira bifrons Barrande in Perner 1903]. It is not extant. Its type locality is Kosov quarry locality (Dlouhá Hora), Kopanina Fm, which is in a Ludlow deep subtidal limestone in the Kopanina Formation of the Czech Republic. It is the type species of Rhabdospira.
It was recombined as Cyclotropis bifrons by Perner (1907) and Perner (1911); it was recombined as Beraunia bifrons by Rohr and Blodgett (2008) and Wagner (2023).
It was recombined as Cyclotropis bifrons by Perner (1907) and Perner (1911); it was recombined as Beraunia bifrons by Rohr and Blodgett (2008) and Wagner (2023).
Synonymy list
| Year | Name and author |
|---|---|
| 1903 | Rhabdospira bifrons Perner figs. pl. 75 f. 28-31 |
| 1907 | Cyclotropis bifrons Perner p. 196 figs. pl. 120 f. 1-3 |
| 1911 | Cyclotropis bifrons Perner figs. pl. 235 f. 29-33 |
| 2008 | Beraunia bifrons Rohr and Blodgett p. 55 figs. 2.14 - 2.16 |
| 2023 | Beraunia bifrons Wagner p. 555 |
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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.
†Beraunia bifrons Perner 1903
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| D. M. Rohr and R. B. Blodgett 2008 | Discoidal, flat-spired shell with rounded whorls, deep sutures, and a wide umbilicus; ornamentation of at least 15 rounded, spiral threads. |