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Erato laevilabiata
Taxonomy
Eratopsis barrandei laevilabiata was named by Sacco (1894). Its type specimen is NHMW 1863/0015/0612, a shell, and it is a 3D body fossil.
It was recombined as Erato laevilabiata by Fehse and Grego (2012).
It was recombined as Erato laevilabiata by Fehse and Grego (2012).
Synonymy list
| Year | Name and author |
|---|---|
| 1894 | Eratopsis barrandei laevilabiata Sacco p. 62 |
| 2012 | Erato laevilabiata Fehse and Grego pp. 26 - 27 figs. Plate 1, figs 11, 15, 16; Plate 11, figs 1-7; Plate 15, fig. 5 |
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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.
†Erato laevilabiata Sacco 1894
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| D. Fehse and J. Grego 2012 | Shell small sized, widely pear-shaped, with a short, somewhat pointed spire. Protoconch mostly covered by thick callus. Suture indistinct. Appearance and number of whorls of protoconch and teleoconch not observable. Spire covered by very thick callus, which covers the suture. Body whorl almost 90% of total shell height, shouldered adapically, with the maximum diameter at * of the distance from the adapical suture, evenly tapering below and only slightly constricted at the ventrum. Dorsum usually covered with large pustules. Dorsum rounded. Dorsal sulcus incised but represented by at least a dimple behind the anterior extremity in fully adult specimens.Aperture comprises c. 80% of total shell height, almost straight and fairly narrow. Labrum very wide, thickened, smooth, rounded and sloping slightly into the aperture, rounded at the outer margin, bearing 10 to 13 coarse, irregular teeth, which extend onto the labrum for a variable distance. Siphonal canal short, widely indented, rounded and straight. Columella smooth, almost straight, with a weakly developed inner carinal ridge and an obsolete parietal lip. Columellar denticles obsolete or absent. Fossula not delimited from the columella. Inner fossular margin slightly constricted. Terminal ridge biplicated.
Range of variation – Some shells are strongly pustulated whereas others are almost smooth. The dorsal sulcus is sometimes almost obsolete. The shell shape varies from ovate to pyriform with the spire more or less elevated. |