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Hormotoma grayiana
Taxonomy
Hormotoma grayiana was named by Donald (1899). It is not extant.
Sister species lacking formal opinion data
Synonymy list
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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.
†Hormotoma grayiana Donald 1899
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. G. Donald 1899 | Shell very elongated, conical, composed of more than eight whorls. Whorls increasing gradually, convex, smooth, with the exception of a raised thread just below the suture. Sinual band situated below the middle of the whorl, level with the surface or but slightly depressed, limited by a raised thread on each side. Lines of growth fine, sharp, curving strongly backward to the band above, and still more obliquely forward below, not visible on the band itself. Aperture imperfectly known, probably subovoid. |
Measurements
No measurements are available
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| Source: subg = subgenus, o = order | |||||
| References: Bambach et al. 2007, Aberhan et al. 2004, Hendy 2009 | |||||