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Placopterina ohioensis
Taxonomy
Placopterina ohioensis was named by Hoare et al. (1978). Its type specimen is OSU 27233., a shell, and it is not a trace fossil. Its type locality is LIm-1. Float by radio tower on Bald Knob, which is in an Atokan carbonate shale/limestone in the Pottsville Formation of Ohio.
Synonymy list
| Year | Name and author |
|---|---|
| 1978 | Placopterina ohioensis Hoare et al. p. 1025 figs. pl. 1 f. 7-10 |
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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.
†Placopterina ohioensis Hoare et al. 1978
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| R. D. Hoare et al. 1978 | Shell small, nearly equivalved, moderately inequilateral; hinge line straight; beaks small, prosogyrate, raised slightly above the hinge line; anterior auricle small, meeting dorsal margin in an obtuse angle; anterior margin uniformly convex and posterior margin meeting dorsal margin at right angle and having less convexity than anterior margin; posterior auricle a broad winglike structure not set off from body of shell; valve surfaces marked by numerous closely spaced fine lines of growth, with no evidence of any radial ornamentation; both valves with the same ornamentation; shell thin. |
Measurements
No measurements are available
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| Source: f = family, o = order, c = class | |||||
| References: Hendy 2009, Aberhan et al. 2004, Kiessling 2004 | |||||