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Pentamerus palaformis
Taxonomy
Pentamerus palaformis was named by Jin and Copper (2000) [= 1928 Pentamerus oblongus juvenalis Twenhofel, p. 204 (nomen nudem).
= 1981 Pentamerus oblongus, smooth morphotype; Mork, p. 542, pl. 84, figs. 12-15; pl. 85, figs. 4-6, 10-13.
= 1984 Pentamerus oblongus blandus Jin, p. 67, pl. 4, figs. 1-14; pl. 5, figs. 8-1 0; pl. 6, figs. 4-7; pl. 7, figs. 1-7; pl. 8, figs. 1-5 (nomen nudem).
= 1991 Pentamerus oblongus juvenalis; Jin and Caldwell, p. 316, pl. I, figs. 9-11.]. Its type specimen is GSC 59162, a valve, and it is a 3D body fossil. Its type locality is A0222. Baie aux Goelands, which is in an Aeronian carbonate lime mudstone in the Jupiter Formation of Canada.
Sister species lacking formal opinion data
Synonymy list
Year | Name and author |
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2000 | Pentamerus palaformis Jin and Copper pp. 37 - 39 figs. Pl. 9, figs. 6-24; Pl. 10, figs. 1-11; Pl. II, figs. 1-5; Pl. 12, figs. 4-10; Text-figs. 20-23 |
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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.
†Pentamerus palaformis Jin and Copper 2000
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Diagnosis
Reference | Diagnosis | |
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J. Jin and P. Copper 2000 | Medium to very large, subtriangular, subrhomboidal, or subpentagonal, equibiconvex shells of Pentamerus, with relatively obtuse apical angles. Medium-sized shells usually wider than long, showing weak trilobation and anterior protrusion of median lob |