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Jedria meeki

Gastropoda -

Taxonomy
Naticopsis meeki was named by Knight (1933). Its type specimen is YPM 14157, a shell, and it is not a trace fossil. Its type locality is SL-1. Headwaters of Feefee Creek, north of Olive St. & west of Lindberg Blvd., 1.5 km northwest of Stratmann (Olivette), which is in a Moscovian marine shale in the Appanoose Formation of Missouri. It is the type species of Jedria.

It was recombined as Naticopsis (Jedria) meeki by Yochelson (1953), Hoare (1961), Kues (1991), Pan (1997) and Kues and Batten (2001); it was recombined as Jedria meeki by Wagner (2017).

Synonymy list
YearName and author
1933Naticopsis meeki Knight pp. 373 – 374 figs. pl. 42 f. 1g-h
1953Naticopsis (Jedria) meeki Yochelson p. 65
1961Naticopsis (Jedria) meeki Hoare pp. 181 - 182 figs. pl. 22 f. 10-11
1991Naticopsis (Jedria) meeki Kues p. 227 figs. 3.7-3.9
1997Naticopsis (Jedria) meeki Pan p. 607
2001Naticopsis (Jedria) meeki Kues and Batten p. 61
2017Jedria meeki Wagner p. 4354

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Protostomia
Spiralia
superphylumLophotrochozoa
phylumMollusca
RankNameAuthor
classGastropodaCuvier 1797
subclassOrthogastropoda
superorderNeritopsinaCox 1960
superfamilyNeritoidea(Rafinesque 1815)
subfamilyNaticopsidae()
genusJedria()
speciesmeeki()

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.

Diagnosis
ReferenceDiagnosis
J. B. Knight 1933Moderately large, neritiform gastropods, which at adult stages have a shallow spiral groove passing around the upper half of the whorls, the groove bounded by the somewhat swollen or shouldered subsutural region, and a rounded revolving ventricosity a little below mid-whorl height; shoulders set off from the spire by only moderately deep sutures and ornamented by fine, but distinct costae, which die out below in the groove; parietal inductura thickened, somewhat flattened, and extended in the plane of the aperture, in some half-grown specimens crossed by distinct transverse rugae; color pattern, fine, closely spaced zigzag, dark, transverse bands on a lighter background.

N. meeki differs from N. ventricosa at the same growth stage mainly in that it is smaller and finer in every particular; its shouldering is not so strong, the costae on the shoulders are finer, the revolving groove is not so well marked and the ventricose band is rounded and not subangular. The nepionic and neanic stages are quite similar to those of N. ventricosa but are again very much smaller and more delicate. In spite of the above, the maximum size, of course rarely attained, seems to be quite as large as in N. ventricosa. My largest specimen, unfortunately too imperfect to figure, must have been fully 49 mm. high and 38 mm. wide. N. meeki differs from N. scintilla in being more strongly grooved, shouldered, and costate than that species, and in having deeper sutures.