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nominal species Megalonoidea rugicosta MacNeil, 1935

Megalonoidea rugicosta MacNeil, 1935 = Amblema rugicosta

MacNeil, 1935. Jour. Paleont. 9: 15, pl. 4, fig. 3; pl. 5, figs. 3-4.

Taxonomic Opinions

= Amblema rugicosta (MacNeil, 1935) — Modell, 1957: 190.

= Megalonoidea rugicosta n. sp. — MacNeil, 1935: 15, pl. 4, fig. 3; pl. 5, figs. 3-4.