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Protanastrophia distorta
Taxonomy
Parastrophinella distorta was named by Nikolaev et al. (1977) [Oradovskaya in Nikolaev, Oradovskaya & Sapelnikov 1977].
It was recombined as Protanastrophia distorta by Jin and Popov (2008).
It was recombined as Protanastrophia distorta by Jin and Popov (2008).
Synonymy list
Year | Name and author |
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1977 | Parastrophinella distorta Nikolaev et al. p. 48 figs. pl. 5 f. 4 |
2008 | Protanastrophia distorta Jin and Popov pp. 223-224, Appendix 2 |
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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.
†Protanastrophia distorta Nikolaev et al. 1977
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Diagnosis
Reference | Diagnosis | |
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J. Jin and L. E. Popov 2008 | Shells up to 15 mm wide, weakly dorsibiconvex, strongly asymmetrical shell with sigmoidal anterior commissure; rudimentary, apsacline ventral inter− area (Oradovskaya 1983: pl. 9: 2), incipient fold and sulcus originating at 2–3 mm from umbo; up to 24 rounded ribs originating at some distance from umbones of both valves; discrete, subparallel inner hinge plates. |