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Johnsonathyris adrianensis
Taxonomy
Johnsonathyris adrianensis was named by Savage et al. (1978). Its type specimen is USNM 223913 and is a 3D body fossil. It is the type species of Johnsonathyris.
Synonymy list
| Year | Name and author |
|---|---|
| 1978 | Johnsonathyris adrianensis Savage et al. p. 382 figs. Pl. 2, figs. 41-50; Text-figs. 10-13 |
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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.
†Johnsonathyris adrianensis Savage et al. 1978
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| N. M. Savage et al. 1978 | The diagnosis of the genus also applies to the type species, at least while the genus is monotypic. [ small subglobular Athyridi dae, subcircular to pentagonal in outline. The anterior commissure is strongly uniplicate. Short, laterally convex dental lamellae lie close to the valve walls. The imperforate cardinal plate bears a shallow trough containing a small median ridge. The brachidium has spiralia with about six volutions j oined by a V-shaped jugum placed anterior of midlength. No jugal saddle or jugal stem is present.] |