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Orthonema carbonaria
Taxonomy
Orthonema carbonaria was named by Worthen (1884). It is not a trace fossil.
It was corrected as Orthonema carbonarium by Worthen (1890), Knight (1934), Yochelson and Saunders (1967) and Pan (1997).
It was corrected as Orthonema carbonarium by Worthen (1890), Knight (1934), Yochelson and Saunders (1967) and Pan (1997).
Synonymy list
| Year | Name and author |
|---|---|
| 1884 | Orthonema carbonaria Worthen |
| 1890 | Orthonema carbonarium Worthen p. 145 figs. pl. 24 f. 4-4a |
| 1934 | Orthonema carbonarium Knight pp. 442 – 443 figs. pl. 57 f. 4 |
| 1967 | Orthonema carbonarium Yochelson and Saunders p. 148 |
| 1997 | Orthonema carbonarium Pan p. 608 |
| 2023 | Orthonema carbonaria Wagner p. 4373 |
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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.
†Orthonema carbonaria Worthen 1884
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. B. Knight 1934 | Moderately small, high-spired, only slightly turreted gastropods, with straight sides; whorl profile only moderately shouldered at the single subsutural carina, rather flat between the upper (subsutural) and lower carinae, except that just within each carina there is a distinct concavity; sharply angulated a t the lower carina and with a nearly flat base; sutures shallow; apertural and columellar characters unknown, though thought to be in accord with those of the genus; ornamentation two moderately elevated revolving carinae, the upper separated from the upper suture by a narrow sloping area and the lower just above the lower suture, within each carina a narrow, shallow revolving groove bordering the flattened area between; color pattern unknown. |