Kornia sphaeroidalis ( Vöhringer, 1960 ) Korn & Weyer, 2023
publication ID |
https://doi.org/ 10.5852/ejt.2023.882.2177 |
publication LSID |
lsid:zoobank.org:pub:67C909E4-C700-4F8D-B8CE-5FD9B2C5D549 |
DOI |
https://doi.org/10.5281/zenodo.8184738 |
persistent identifier |
https://treatment.plazi.org/id/03EA5C14-CA2C-8569-FE27-FDDFFCB680AE |
treatment provided by |
Felipe |
scientific name |
Kornia sphaeroidalis ( Vöhringer, 1960 ) |
status |
comb. nov. |
Kornia sphaeroidalis ( Vöhringer, 1960) comb. nov.
Fig. 24 View Fig ; Table 14
Imitoceras sphaeroidale Vöhringer, 1960: 143 , pl. 2 fig. 7.
Acutimitoceras sphaeroidale – Korn 1994: 49, text-figs 49e, 55c.
Acutimitoceras (Stockumites) sphaeroidale – Becker 1996: 36.
non Acutimitoceras sphaeroidale – Vöhringer 1960: 143, text-fig. 21. — Korn 1992b: 17, pl. 2 figs 30– 31; 1994: text-figs 50f, 51b, 55d. — Schönlaub et al. 1992: pl. 5 figs 30–31.
Diagnosis
Species of Kornia with a thickly pachyconic, involute conch (ww/dm ~0.80; uw/dm ~0.05) at 24 mm conch diameter. Ornament with widely spaced growth lines with convex course and a shallow ventral sinus.
Material examined
Holotype
GERMANY • Rhenish Mountains, Oberrödinghausen , railway cutting; Hangenberg Limestone , bed 5; Vöhringer Coll.; illustrated by Vöhringer (1960: pl. 2 fig. 7) and Korn (1994: text-fig. 49e); re-illustrated here in Fig. 24 View Fig ; GPIT-PV- 63865.
Additional material
GERMANY • 1 specimen; Rhenish Mountains, Oberrödinghausen , railway cutting; Hangenberg Limestone , bed 5a1; Weyer 1993–1994 Coll.; MB.C. 31068 .
Description
Holotype GPIT-PV-63865 ( Fig. 24A View Fig ) is a thickly pachyconic specimen with 24 mm dm (ww/dm = 0.82). It has a slightly opened umbilicus (uw/dm = 0.06) and a low coiling rate (WER = 1.67). The specimen bears small shell remnants that possess widely spaced, lamellar growth lines; these extend in a low and wide arc across the flanks and form a broad and shallow ventral sinus. Parallel to this extend faint inner shell thickenings ( Fig. 24B View Fig ).
Specimen MB.C.31068 is a rather well-preserved specimen with 13 mm conch diameter ( Fig. 24C View Fig ). It is globular and subinvolute (ww/dm = 0.91; uw/dm = 0.19) with a low coiling rate (WER = 1.56). The whorl profile is C-shaped with rounded umbilical margin and steep, flattened umbilical wall. The shell bears lamellar growth lines directed slightly backwardly from the umbilical margin and forming a shallow, very broad sinus on the venter. There is one shell constriction that extends parallel to the growth lines.
Remarks
Vöhringer (1960) united two species under the name “ Imitoceras sphaeroidale ”. Holotype GPIT- PV-63865 is a nearly globular specimen with 24 mm dm (ww/dm = 0.82), but the illustrated cross section GPIT-PV-63927 (ww/dm = 0.69 at 15 mm dm) and the smaller specimen GPIT-PV-63932 belong to a much more slender form. This is newly described here as Hasselbachia erronea sp. nov. Unfortunately, the morphology of the inner whorls is not known.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
Kingdom |
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Phylum |
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Class |
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Order |
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Family |
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Genus |
Kornia sphaeroidalis ( Vöhringer, 1960 )
Korn, Dieter & Weyer, Dieter 2023 |
Acutimitoceras (Stockumites) sphaeroidale
Becker R. T. 1996: 36 |
Acutimitoceras sphaeroidale
Korn D. 1994: 49 |
Imitoceras sphaeroidale Vöhringer, 1960: 143
Vohringer E. 1960: 143 |
Acutimitoceras sphaeroidale
Korn D. 1992: 17 |
Schonlaub H. P. & Attrep M. & Boeckelmann K. & Dreesen R. & Feist R. & Hahn G. & Klein H. - P. & Korn D. & Kratz R. & Magaritz M. & Schramm J. - M. 1992: 38 |
Vohringer E. 1960: 143 |