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Niveria parvavellana
Taxonomy
Trivia sphaericulata parvavellana was named by Sacco (1894) [Lectotype, designated by Ferrero Mortara et al. (1984).]. Its type specimen is BS.68.043.12.010, a shell, and it is a 3D body fossil.
It was recombined as Trivia parvavellana by Schilder (1932); it was recombined as Trivia (Sulcotrivia) parvavellana by Schilder (1941); it was recombined as Niveria parvavellana by Fehse and Landau (2002).
It was recombined as Trivia parvavellana by Schilder (1932); it was recombined as Trivia (Sulcotrivia) parvavellana by Schilder (1941); it was recombined as Niveria parvavellana by Fehse and Landau (2002).
Synonymy list
Year | Name and author |
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1894 | Trivia sphaericulata parvavellana Sacco p. 49 figs. pl. 3, fig. 36 |
1932 | Trivia parvavellana Schilder p. 104 |
1941 | Trivia (Sulcotrivia) parvavellana Schilder p. 74 |
2002 | Niveria parvavellana Fehse and Landau pp. 98 - 99 figs. 3/1 a-c, 2a, b; 6/4a-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 parvavellana Sacco 1894
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Diagnosis
Reference | Diagnosis | |
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D. Fehse and B. Landau 2002 | Shell small, solid, inflated and oval. Spire covered by callus, barely visible beneath 2 vertical riblets, extending upwards from the posterior terminal. Body whorl globose, about 95% of total height. The terminals are produced, the anterior flattened, the posterior rounded. Dorsum evenly rounded, covered by 16-20 strong, somewhat irregular ribs. A narrow dorsal sulcus, of variable strength, extends longitudinally across the centre of the dorsum. The ribs become thickened at the edge of the sulcus and either bisected or narrowed as they cross the depression. Base almost straight, with the anterior terminal hardly recurved and the posterior strongly so. The aperture is narrow, strongly curved adapically and widened in the area of the fossula. Outer lip broadened, convex, widest in mid-portion, becoming narrower towards the terminals and regularly rounded, bearing 19-22 strong, equal teeth. Outer lip, with an angular margin. Siphonal and anal canals are slightly indented. Columella concave, tapering inwards, bordered internally by a weak carinal ridge. Columella bears 17-19 ribs, which run onto the carinal ridge, which is slightly protruding in the fossular region. Fossula concave and not clearly delimited from the rest of the columella. In most of the specimens a clear colour pattern is visible; it consists of a small brown spot on the anterior end of the dorsal sulcus, a patch surrounding the posterior end and mid-dorsally a larger patch on either side of the sulcus, which, in some specimens, are fused. |
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 Messinian to the top of the Piacenzian or 7.24600 to 2.58800 Ma
Collections (6 total)
Time interval | Ma | Country or state | Original ID and collection number |
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Messinian | France | Niveria parvavellana (178470) | |
Zanclean | Italy | Niveria parvavellana (178810) | |
Zanclean | Spain | Niveria parvavellana (80564 178254) | |
Piacenzian | Spain | Niveria parvavellana (80561 80562) |