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Taxonomy
Modiola illinoisensis was named by Worthen (1884). It is a 3D body fossil.
It was recombined as Myalina illinoisensis by Girty (1915); it was recombined as Promytilus illinoisensis by Busanus and Hoare (1991).
It was recombined as Myalina illinoisensis by Girty (1915); it was recombined as Promytilus illinoisensis by Busanus and Hoare (1991).
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1884 | Modiola illinoisensis Worthen p. 16 |
| 1897 | Myalina arkansana Weller p. 262 figs. pl. 20 f. 16-17 |
| 1903 | Myalina arkansana Girty p. 307 |
| 1915 | Myalina illinoisensis Girty p. 94 figs. Pl. 6 f.4-5 |
| 1991 | Promytilus illinoisensis Busanus and Hoare pp. 467 – 468 fig. 3.17–3.19 |
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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.
†Promytilus illinoisensis Worthen 1884
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Invalid names: Myalina arkansana Weller 1897 [synonym]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. W. Busanus and R. D. Hoare 1991 | Promytilus with moderately large anterior lobe separated from rest of valve by distinct, broad sulcus; dorsal margin straight to slightly sinuous posteriorly; posterior margin broadly convex, more narrowly so posteroventrally; surface or- namented with prominent growth laminae. |