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Gyrodes expansa

Gastropoda - Naticidae

Taxonomy
Gyrodes expansa was named by Gabb (1864) [ANSP 4245 is lectotype.]. It is extant. Its type specimen is ANSP 4245, a shell.

It was recombined as Gyrodes (Sohlella) expansus by Popenoe et al. (1987).

Synonymy list
YearName and author
1864Gyrodes expansa Gabb p. 108 figs. Pl. 19, fig. 62a-b [only; not fig. 62c
1987Gyrodes (Sohlella) expansus Popenoe et al. pp. 88 - 89 figs. 6.33-6.38

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Protostomia
Spiralia
superphylumLophotrochozoa
phylumMollusca
classGastropodaCuvier 1797
RankNameAuthor
superorderHypsogastropoda(Ponder and Lindberg 1997)
infraorderLittorinimorphaGolikov and Starobogtov 1975
superfamilyNaticoidea(Forbes 1838)
familyNaticidaeGuilding 1834
subfamilyAmpullospirinaeCox 1930
genusGyrodesConrad 1860
speciesexpansaGabb 1864

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.

Diagnosis
ReferenceDiagnosis
W. P. Popenoe et al. 1987Shell thick for the subgenus, medium to moderately large sized, surface strongly textured by growth lines especially in large individuals; spire about 24% of total height; suture appressed, at posterior third of penultimate whorl; shoulder roundly tabulate; whorl profile flattened abapical to the tabulation, then roundly inflated; umbilical margin roundly subangulate; umbilicus steeply sloping; growth line obliquely prosocline with antispiral flexure within the umbilicus; aperture broadly tear-drop shaped; outer lip thin, projected posteriorly; inner lip thin anteriorly, thickened posteriorly, wrapping onto the last whorl at the umbilical angulation.