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Gastropoda - Aporrhaidae
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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.
|E. L. Packard 1922 (Gyrodes californica)||Shell medium size, nearly as high as broad, spire low, consisting of three whorls, which are depressed, rounded without groove or tabulation; suture appressed; aperture subcircular, broadly rounded below and angulated above; umbilicus very small; surface sculptured by irregular lines of growth. Height of type, about 17 mm.; diameter of body whorl, 19.5 mm.|