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Trivia mienisi
Taxonomy
Trivia mienisi was named by Fehse and Grego (2006). Its type specimen is HUJ 9720-1, a shell, and it is a 3D body fossil. Its type locality is Ficarazzi, which is in a Piacenzian coastal horizon in Italy.
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 2006 | Trivia mienisi Fehse and Grego pp. 89 - 91 figs. 1-3 |
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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.
†Trivia mienisi Fehse and Grego 2006
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| D. Fehse and J. Grego 2006 | The shell is medium-sized, light-weight, solid and inflatedly ovate. The spire is slightly elevated, covered by callus, faintly visible beneath two vertical riblets extending upwards from the posteriorly terminal. The body whorl is inflated and ovate, about 95% of total height, with both terminals slightly produced posteriorly. The terminal tips are blunt. The dorsum is evenly roundly elevated, without even a dorsal depression. The dorsum is completely covered by 30-36 strong, irregular ribs with interstices of the double widthof the ribs. Some of the dorsal riblets terminate anywhere on the shell, others become fused. The ventrum is convex with straight terminals. The aperture is semicircularly curved, narrow, barely wider at fossular section. The labrum is roundly callused, narrow, slightly curved, keeled towards its inner margin. The outer labral margin roundly callused with a small shoulder. On its inner margin the labrum bears 20-22 fine, somewhat irregular denticles with interstices of variable width. The siphonal and anal canal are shallowly indented. Both are bordered adapically and abapically by callused and rounded ventral side-walls. The columella and fossula are less developed. The columellais straight, narrow, tapering steeply inwards. The parietal lip is not developed, bearing 18-20 fine ribs, continued as finer folds onto the columella and fossula. The fossula is slightly concave and not clearly delimited from the rest of the columella. The inner fossular edge is slightly protruded and denticulated. |
Measurements
No measurements are available
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| Source: f = family, c = class | |||||
| References: Hendy et al. 2009, Kiessling 2004 | |||||
Age range: Piacenzian or 3.60000 to 2.58000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Piacenzian | Italy | Trivia mienisi (type locality: 178466) |