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Dolichupis (Trivellona) shimajiriensis
Taxonomy
Dolichupis (Trivellona) shimajiriensis was named by MacNeil (1960). Its type specimen is USNM 562667, a shell, and it is a 3D body fossil. Its type locality is USGS 17448 - Okinawa, which is in a Miocene deep-water claystone/sandstone in the Shimajiri Formation of Japan.
Synonymy list
| Year | Name and author |
|---|---|
| 1960 | Dolichupis (Trivellona) shimajiriensis MacNeil p. 49 figs. Plate 2, figures 10, 13-15 |
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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.
†Dolichupis (Trivellona) shimajiriensis MacNeil 1960
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| F. S. MacNeil 1960 | Shell medium large for the genus, inflated, spire hump well denned. Aperture narrow, gently curved centrally and anteriorly but more abruptly curved posteriorly. Anterior canal only slightly wider than the aperture above, posterior canal not appreciably sunken and slightly narrower than aperture below. Outer lip thickened and flattened both at the anterior and posterior ends. Columellar lip bearing a sharp terminal ridge at the anterior end and a sharp raised elongate pustule at the posterior end, rounded centrally. A well-defined lateral depression at the edge of the outer lip. Sculptured by sharp raised spiral ridges numbering about 22 at the inner lip edge where they become columellar teeth, 24 on the outer lip, the central ones (about 12) continuous across the dorsum with only a slight crowding, and those above and below discontinuous or recurving sharply from points about one third the distance from either end; spirals higher and sharper on the terminal ridge, at the anterior end of the outer lip, and on the posterior pustule. |