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Protanastrophia
Taxonomy
Protanastrophia was named by Jin and Popov (2008). Its type is Protanastrophia repanda. It was considered monophyletic by Jin and Popov (2008).
It was assigned to Parastrophinidae by Jin and Popov (2008).
It was assigned to Parastrophinidae by Jin and Popov (2008).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 2008 | Protanastrophia Jin and Popov pp. 222 - 224 |
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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. †Protanastrophia Jin and Popov 2008
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†Protanastrophia asimmetrica Rozman 1970
†Protanastrophia distorta Nikolaev et al. 1977
†Protanastrophia indistincta Rubel 1970
†Protanastrophia repanda Jin and Popov 2008
†Protanastrophia salairica Severgina 1978
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. Jin and L. E. Popov 2008 | Small, transversely elliptical to subpentagonal, dorsibiconvex shell, smooth posteriorly, faintly to moder− ately costate anteromedially; dorsal valve usually larger, deeper, with higher and more prominent umbo than ventral valve. Ventral sulcus and anterior commissure commonly asymmetrical. Ventral median septum short, low; inner hinge plates high, discrete, subparallel to each other; alate plates present. |