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Portlockiella kentuckyensis
Taxonomy
Portlockiella kentuckyensis was named by Knight (1945). Its type specimen is USNM 11767, a shell, and it is a 3D body fossil. Its type locality is Elizabethtown, which is in a Meramecian carbonate limestone in the Ste. Genevieve Formation of Kentucky. It is the type species of Portlockiella.
Synonymy list
| Year | Name and author |
|---|---|
| 1945 | Portlockiella kentuckyensis Knight pp. 581 - 582 figs. pl. 79 f. 2a-c |
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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.
†Portlockiella kentuckyensis Knight 1945
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. B. Knight 1945 | This species is characterized by relatively large size, coarse ornamentation, and somewhat square-faced whorls; revolving costae characteristically grouped rather than evenly distributed, a pair of costae close to the upper suture followed by a conspicuously wide, rather flat, interspace which slopes downward at an angle a little more than 50? from the vertical to a conspicuous costa that forms a shoulder separating the upper from the outer whorl face, another costa at about the middle of the other whorl face followed below by an interspace and next by the selenizone which is bordered above by a somewhat weak costa and below by a stronger costa that forms the angulation between the outer whorl face and the base, five or six costae on the base, evenly spaced and about equally developed except that the next to last one close to the umbilicus is a little stronger than the others and the last one, actually within the umbilical slope, is a little weaker, the revolving costae crossed by fine, sharp transverse lirae outlining the form of the outer lip; the selenizone a little narrower than the other interspaces and not so deeply concave, the lunulae somewhat asymmetrical, more comma-shaped than crescentic; the slit short, only a little more than a notch; shell moderately thick, its structure imperfectly known, but seemingly of two layers. The first 2+ whorls are smooth and deeply imbricating, the ornamentation being introduced first on the third whorl. |
Measurements
No measurements are available
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| Source: o = order | |||||
| Reference: Bambach et al. 2007 | |||||
Age range: Meramecian or 342.90000 to 335.40000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Meramecian | USA (Kentucky) | Portlockiella kentuckyensis (type locality: 156788) |