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Niveria dorsolaevigata
Taxonomy
Trivia affinis dorsolaevigata was named by Cocconi (1873).
It was recombined as Trivia dorsolaevigata by Sacco (1894); it was recombined as Trivia (Sulcotrivia) dorsolaevigata by Schilder (1941); it was recombined as Niveria dorsolaevigata by Fehse and Landau (2002).
It was recombined as Trivia dorsolaevigata by Sacco (1894); it was recombined as Trivia (Sulcotrivia) dorsolaevigata by Schilder (1941); it was recombined as Niveria dorsolaevigata by Fehse and Landau (2002).
Synonymy list
| Year | Name and author |
|---|---|
| 1873 | Trivia affinis dorsolaevigata Cocconi p. 162 |
| 1894 | Trivia dorsolaevigata Sacco p. 52 figs. pl. 3, fig. 44 |
| 1941 | Trivia (Sulcotrivia) dorsolaevigata Schilder p. 74 |
| 2002 | Niveria dorsolaevigata Fehse and Landau p. 97 figs. 2/6a-c; 5/la-c |
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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.
†Niveria dorsolaevigata Cocconi 1873
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| D. Fehse and B. Landau 2002 | Shell large, relatively solid, inflated and oval. Spire covered by callus, faintly visible beneath 4-6 vertical riblets extending upwards from the posterior terminal. Body whorl globose and inflated, about 90-95% of total height. The terminals are rounded, the anterior strongly produced, the posterior weakly so. Dorsum rounded, bearing 30-36 fine ribs. A narrow dorsal sulcus extends longitudinally across the centre of the dorsum, depressing most of the ribs, bisecting a few in the anterior portion. Base convex, with the terminals strongly recurved. The aperture is relatively narrow below the posterior terminal, becoming progressively wider abapically. Outer lip broadened, convex, widest in mid-portion, becoming narrower towards the terminals and regularly rounded. bearing 21-23 strong, equal teeth. Outer lip, with a strong angular margin. Siphonal and anal canals follow the shell profile. Columella convex, tapering steeply inwards, bordered internally by a carinal ridge. Columellabears 17-21 ribs, which run onto the carinal ridge, which is strongly protruding in the fossular region. Fossula deeply concave and delimited from the rest of the columella. A colour pattern is preserved on one of the specimens, consisting of two irregularly formed brown spots, one at either extremity of the dorsal sulcus. |