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Cerithiopsis (Heterocerithiopsis) smithfieldensis
Taxonomy
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1916 | Cerithiopsis (Heterocerithiopsis) smithfieldensis Olsson pp. 136 - 137 figs. Plate 1, Fig. 7 |
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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.
†Cerithiopsis (Heterocerithiopsis) smithfieldensis Olsson 1916
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. Olsson 1916 | Shell small, elongate-conic, with slightly convex outlines : protoconch of 1 + whorls (the tip broken on my specimens ) ; the last nuclear whorl strongly keeled ; above the peripheral keel with 20 curved, oblique riblets, below with oblique riblets which cross each other at right angles ; later whorls about 7, the 1st 4 with only 2 tuberculated spirals, the remainder with 3; the last spiral is introduced above the other 2 and soon equals them in strength ; riblets about 19, straight, extending from the suture across the spirals and their interspaces ; the spirals tuberculated by the riblets ; suture distinct, excavated with a small , smooth spiral within ; base markedly flattened, with 2 smooth spirals, the uppermost commencing at the suture, the 2nd, just below ; the rest of the base is smooth but occasion ally an obscure spiral is present encircling the columella ; can al bent to the left. |