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Protanastrophia repanda
Taxonomy
Protanastrophia repanda was named by Jin and Popov (2008). Its type specimen is ROM 57734 and is a 3D body fossil. Its type locality is AK2c, shoreline outcrop on the north side of Akimiski Island, which is in a Telychian reef, buildup or bioherm limestone in the Attawapiskat Formation of Canada. It is the type species of Protanastrophia.
Synonymy list
| Year | Name and author |
|---|---|
| 2008 | Protanastrophia repanda Jin and Popov pp. 224 - 225 fig. 1–3 |
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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 repanda Jin and Popov 2008
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. Jin and L. E. Popov 2008 | Shell small, transversely elliptical to subpentagonal, dorsibiconvex, smooth posteriorly, weakly costate anteromedially; dorsal valve notably larger, deeper, with higher and more prominent umbo than ventral valve. Anterior commissure uniplicate, variably asymmetrical or sigmoidal. Ventral sulcus and dorsal fold developed anteriorly, broad and variously asymmetrical. Ventral median septum short, very low; inner hinge plates high, discrete, subparallel to each other; alate plates well developed. |