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Platystrophia ponderosa

Rhynchonellata - Orthida - Platystrophiidae

Platystrophia ponderosa was named by Foerste (1909). It is a 3D body fossil.

It was recombined as Vinlandostrophia ponderosa by Zuykov and Harper (2007).

Synonymy list
YearName and author
1909Platystrophia ponderosa Foerste p. 225 figs. pl. 4 f. 14
1979Platystrophia ponderosa Alberstadt pp. B16-B18 figs. Plate 1, figures 1-21; plate 2, figures 1-27; plate 4, figures 16, 18-33
2007Vinlandostrophia ponderosa Zuykov and Harper pp. 29 - 30 figs. Plate II, figures 17-20; Figure 2A,B

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EubilateriaAx 1987
phylumBrachiopodaCuvier 1805
subphylumRhynchonelliformeaWilliams et al. 1996
classRhynchonellataWilliams et al. 1996
orderOrthidaSchuchert and Cooper 1932
suborderOrthidinaSchuchert and Cooper 1932
superfamilyPlectorthoideaSchuchert and Le Vene 1929
familyPlatystrophiidaeSchuchert 1929

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.

A. F. Foerste 1909Platystrophia ponderosa is characterized by its large size, thick valves, and quadrangular outline; the brachial valve has a prominent, though rather rounded, median fold, usually occupied by four plications. The sinus on the pedicel valve is broad, not very deep, and is occupied usually by three plications. The lateral plications vary between 7 and 9. Sometimes 6 plications occupy the median fold. The shell is greatly thickened interiorly, especially around the deep muscular scar in the pedicel valve.
L. P. Alberstadt 1979Vinlandostrophia species having shells quadrate to subquadrate in outline, with maximum width in anterior third of shell; radial ornament of angular costate, three costae in sulcus, four on fold and six to eight costae on flanks of both valves; ventral sulcus and dorsal fold prominent, shallow to moderately deep; septalium V-shaped.