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Simnia (Calpurna) cookei
Taxonomy
Simnia (Calpurna) cookei was named by MacNeil and Dockery (1984). Its type specimen is USNM 498348, a shell, and it is a 3D body fossil. Its type locality is USGS 7376. West bank of Leaf River 1 mile below abandoned bridge over Leaf River, which is in a Rupelian offshore claystone/sandstone in the Byram Formation of Mississippi.
Synonymy list
| Year | Name and author |
|---|---|
| 1984 | Simnia (Calpurna) cookei MacNeil and Dockery p. 99 figs. Plate 28, figures 9,18 |
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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.
†Simnia (Calpurna) cookei MacNeil and Dockery 1984
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| F. S. MacNeil and D. T. Dockery 1984 | Shell moderately small, medium inflated, spindle-shaped, involute with the aperture extending the length of the shell; spire concealed; surface smooth; anterior end pointed, posterior end blunt; aperture moderately narrow, outer lip thick; inner lip with a weak diagonal fold posteriorly; columella indistinct but with a weak angulation that curves gently. |
Measurements
No measurements are available
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| Source: f = family, c = class | |||||
| References: Hendy et al. 2009, Kiessling 2004 | |||||