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Spirotropis (Antiplanes) perversa
Taxonomy
Pleurotoma (Surcula) perversa was named by Gabb (1865). It is extant.
It was recombined as Pleurotoma perversa by Cooper (1888) and Ashley (1895); it was recombined as Turris perversa by Packard (1918); it was recombined as Spirotropis (Antiplanes) perversa by Grant, IV and Gale (1931) and Soper and Grant (1932); it was recombined as Antiplanes perversa by Clark (1931); it was replaced with Antiplanes catalinae by Hendy (2021).
It was recombined as Pleurotoma perversa by Cooper (1888) and Ashley (1895); it was recombined as Turris perversa by Packard (1918); it was recombined as Spirotropis (Antiplanes) perversa by Grant, IV and Gale (1931) and Soper and Grant (1932); it was recombined as Antiplanes perversa by Clark (1931); it was replaced with Antiplanes catalinae by Hendy (2021).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1865 | Pleurotoma (Surcula) perversa Gabb p. 183 |
| 1866 | Pleurotoma (Surcula) perversa Gabb p. 6 figs. PI. 1, Fig. 10 |
| 1888 | Pleurotoma perversa Cooper p. 260 |
| 1895 | Pleurotoma perversa Ashley p. 343 |
| 1918 | Turris perversa Packard pp. 342 - 343 figs. Plate 41, figures 3a and 3b |
| 1931 | Antiplanes perversa Clark pp. table opp. p. 30 |
| 1931 | Spirotropis (Antiplanes) perversa Grant, IV and Gale |
| 1932 | Spirotropis (Antiplanes) perversa Soper and Grant |
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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.
Spirotropis (Antiplanes) perversa Gabb 1865
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| U. S. Grant, IV and H. R. Gale 1931 | Shell of medium to large size, more often sinistral than dextral, spire elevated, of variable height, whorls eleven to twelve, flattened or rounded, smooth except for growth lines and on well-preserved specimens extremely fine spirals, protoconch of about two smooth, rounded, loosely coiled whorls; aperture varying aromid two-fifths length of shell, outer lip thin, with a deep, rounded notch a short distance below the suture, columella smooth, somewhat flexuous, of variable length, inner lip slightly resorbed; operculum with a terminal nucleus like that of typical Spirotropis. |