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Niveria permixta
Taxonomy
Cypraea permixta was named by de Cristofori and Jan (1832) [Lectotype designated by Pinna & Spezia (1978, p. 139, pi. 21, fig. 1, la),]. Its type specimen is MCSNM i.4314, a shell, and it is a 3D body fossil.
It was recombined as Trivia permixta by Schilder (1932); it was recombined as Trivia (Sulcotrivia) permixta by Schilder (1941) and Schilder and Schilder (1971); it was recombined as Niveria permixta by Fehse and Landau (2002).
It was recombined as Trivia permixta by Schilder (1932); it was recombined as Trivia (Sulcotrivia) permixta by Schilder (1941) and Schilder and Schilder (1971); it was recombined as Niveria permixta by Fehse and Landau (2002).
Synonymy list
| Year | Name and author |
|---|---|
| 1832 | Cypraea permixta de Cristofori and Jan p. 15 |
| 1932 | Trivia permixta Schilder p. 105 |
| 1941 | Trivia (Sulcotrivia) permixta Schilder p. 74 |
| 1971 | Trivia (Sulcotrivia) permixta Schilder and Schilder p. 18 |
| 2002 | Niveria permixta Fehse and Landau pp. 96 - 97 figs. 2/4a-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 permixta de Cristofori and Jan 1832
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| D. Fehse and B. Landau 2002 | Shell large, solid, somewhat elongated to very inflated, oval. Spire covered by callus, but faintly visible beneath 3-5 vertical riblets extending upwards from the posterior terminal. Body whorl varies from somewhat elongated and globose to greatly inflated, about 90% of total height. The terminals are rounded, the anterior strongly produced, the posterior weakly so. Dorsum rounded to strongly humped in the posterior third, covered by 30-34 ribs. On mid-portion of the shell, the ribs become much wider towards the summit, where in most specimens they are obsolete, to a variable degree. The summit has a polished appearance due to callus deposited over the ribs, rather than abrasion. A dorsal sulcus, of variable strength and width, extends longitudinally across the centre of the dorsum, bisecting some of the ribs, depressing others. Base convex, with the terminalsrecurved. The aperture is relatively narrow in the posterior portion and curved adapically, wider in the anterior part. Outer lip broadened, convex, widest in mid-portion, becoming narrower towards the terminals and regularly rounded, bearing 20-25 strong, equal teeth. Outer lip, with a strong angular margin. Siphonal and anal canals are slightly protruding. Columella convex, tapering steeply inwards, bordered internally by a strong carinal ridge. Columella bearing 18-23 ribs, which run onto the carinal ridge, where they become thickened. The carinal ridge is strongly protruding in the fossular region. Fossula deeply concave and clearly delimited from the rest of the columella. In most specimens a colour pattern is preserved; dorsal part brown, base and outer lip white. |
Measurements
No measurements are available
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| Source: f = family, c = class | |||||
| References: Kiessling 2004, Hendy et al. 2009 | |||||
Age range: base of the Zanclean to the top of the Piacenzian or 5.33300 to 2.58800 Ma
Collections (4 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Zanclean | Spain | Niveria permixta (80564 178254) | |
| Piacenzian | Spain | Niveria permixta (80561 80562) |