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Bipulvina
Taxonomy
Bipulvina was named by Yochelson (1958) [Sepkoski's age data: O Trem Sepkoski's reference number: 1]. It is not extant. Its type is Bipulvina croftsae.
It was assigned to Tryblidiinae by Yochelson (1958) and Knight and Yochelson (1960); to Bipulvinidae by Starobogatov (1970); to Tryblidiidae by Runnegar and Jell (1976); and to Tryblidiida by Sepkoski (2002).
It was assigned to Tryblidiinae by Yochelson (1958) and Knight and Yochelson (1960); to Bipulvinidae by Starobogatov (1970); to Tryblidiidae by Runnegar and Jell (1976); and to Tryblidiida by Sepkoski (2002).
Species
B. croftsae (type species), B. liaoningensis
Synonymy list
| Year | Name and author |
|---|---|
| 1958 | Bipulvina Yochelson |
| 1960 | Bipulvina Knight and Yochelson p. 78 |
| 1970 | Bipulvina Starobogatov p. 301 |
| 1976 | Bipulvina Runnegar and Jell p. 119 |
| 2002 | Bipulvina Sepkoski |
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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.
G. †Bipulvina Yochelson 1958
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†Bipulvina croftsae Yochelson 1958
†Bipulvina liaoningensis Yü and Yochelson 1999
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| E. L. Yochelson 1958 | Low, spoon-shaped monoplacophorans having the interior of the dorsum flattened for more than half of its length and set off from the anterior and posterior slopes; apex strongly anterior, just projecting over apertural margin ; five pairs of subtriangular lateral muscle scars located relatively high on lateral slopes, with some additional markings on anterior slope; ornament unknown; interior of shell with two furrows parallel to lines of muscle scars. |