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Niveria avellanula
Taxonomy
Trivia avellanula was named by Sacco (1894).
It was recombined as Trivia (Sulcotrivia) avellanula by Schilder (1941); it was recombined as Niveria avellanula by Fehse and Landau (2002).
It was recombined as Trivia (Sulcotrivia) avellanula by Schilder (1941); it was recombined as Niveria avellanula by Fehse and Landau (2002).
Synonymy list
| Year | Name and author |
|---|---|
| 1894 | Trivia avellanula Sacco p. 53 figs. pl. 3, fig. 43 |
| 1932 | Trivia avellanula Schilder p. 104 |
| 1941 | Trivia (Sulcotrivia) avellanula Schilder p. 74 |
| 2002 | Niveria avellanula Fehse and Landau pp. 97 - 98 figs. 2/5a-c; 6/1a-d |
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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 avellanula Sacco 1894
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| D. Fehse and B. Landau 2002 | Shell large, solid, somewhat elongated and inflated, oval. Spire covered by callus, barely visible beneath 2-3 vertical riblets, extending upwards from the posterior terminal. Body whorl elongated globose, about 90% of total height. The terminals are rounded, the anterior produced, the posterior weakly so. Dorsum rounded, slightly elevated in mid-portion, covered by 20-22 strong ribs. A fairly wide dorsal sulcus, of variable strength, extends longitudinally across the centre of the dorsum. The ribs become thickened at the edge of the sulcus, narrowing as they cross the depression. Base very weakly and regularly convex. The aperture is relatively wide. Outer lip broadened, convex, widest in mid-portion, becoming narrower towards the terminals and regularly rounded, bearing 16-20 strong, equal teeth. Outer lip, with a strong angular margin. Siphonal and anal canals are slightly protruding. Columellaconcave, tapering inwards, bordered internally by a weak carinal ridge. Columella bears 16-17 ribs, which run onto the carinal ridge, where they become thickened. The carinal ridge is slightly protruding in the fossular region. Fossula concave and not clearly delimited from the rest of the columella. |
Measurements
No measurements are available
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| Source: f = family, c = class | |||||
| References: Hendy et al. 2009, Kiessling 2004 | |||||
Age range: base of the Tortonian to the top of the Piacenzian or 11.62000 to 2.58800 Ma
Collections (4 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Tortonian | Italy | Niveria avellanula (178120) | |
| Zanclean | Spain | Niveria avellanula (178254) | |
| Zanclean - Piacenzian | Italy | Niveria avellanula (178221) | |
| Piacenzian | Spain | Niveria avellanula (80562) |