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Actinopterella
Taxonomy
Actinopterella was named by Williams (1908).
It was assigned to Pterineidae by Williams (1908); and to Actinopterellinae by Bouchet et al. (2010).
It was assigned to Pterineidae by Williams (1908); and to Actinopterellinae by Bouchet et al. (2010).
Synonymy list
| Year | Name and author |
|---|---|
| 1908 | Actinopterella Williams |
| 2010 | Actinopterella Bouchet et al. |
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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.
G. †Actinopterella Williams 1908
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| H. S. Williams 1908 | Oblique pterinoid shells with posterior wing and anterior ear both well developed; both valves strongly convex, left valve ventricose, with narrow oblique body; right valve generally less convex than left but convex from beak to ventral margin, not becoming resupinate. Umbones protruding slightly beyond the hinge line. Ligamental area well developed, striated; cardinal teeth present, three or four in number; lateral teeth (or tooth) well developed and close to ligamental area. A small deep, anterior muscular scar situated on the ear; the large posterior muscular scar is obscure. Surface ornamentation fine or strong radial ribs on body and wing and occasionally on ear of left valve; radial ribs on body of right valve occasionally strong but generally obscure. Size smaller than many pterinoids; largest specimens from Maine collections rarely over 35 mm. long. |