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Genuspira nodosa
Taxonomy
Bembexia (Genuspira) nodosa was named by Tyler (1965). Its type specimen is USNM 144462, a shell, and it is a 3D body fossil. Its type locality is river bed immediately downstream from the Four Mile Dam on Thunder Bay River, which is in a Givetian carbonate limestone in the Four Mile Dam Formation of Michigan. It is the type species of Bembexia (Genuspira).
It was recombined as Bembexia nodosa by Rollins et al. (1971) and Linsley and Kesling (1982); it was recombined as Genuspira nodosa by Wagner (2023).
It was recombined as Bembexia nodosa by Rollins et al. (1971) and Linsley and Kesling (1982); it was recombined as Genuspira nodosa by Wagner (2023).
Synonymy list
| Year | Name and author |
|---|---|
| 1965 | Bembexia (Genuspira) nodosa Tyler p. 343 figs. pl. 48 f. 8-12 |
| 1971 | Bembexia nodosa Rollins et al. p. 154 |
| 1982 | Bembexia nodosa Linsley and Kesling p. 1085 |
| 2023 | Genuspira nodosa Wagner p. 1483 |
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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.
†Genuspira nodosa Tyler 1965
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. H. Tyler 1965 | Shell of small to moderate size, holotype 13.9 mm. high and 16 mm. wide, with features typical of the subgenus; shoulder generally strongly angular but in few specimens being slightly subdued, giving slightly roundedwhorl profile; base moderately convex; growth lines extremely fine, being indiscernible on mostspecimens; ornamentation consisting of abrupt outer angulation regularly divided to form small nodes; nodes very slightly elongate and radiallyoriented; row of nodes traceable to lower nuclear whorls; some paratypes showing subdued subsutural nodes have shoulder interrupted, forming irregular, subdued nodes; inductura of body whorl of holotype has scar probably formed by removal of attached material. |