Kornia fibula, 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.8187527 |
persistent identifier |
https://treatment.plazi.org/id/D2D2D504-131B-4342-9CEC-4C8E29E433C1 |
taxon LSID |
lsid:zoobank.org:act:D2D2D504-131B-4342-9CEC-4C8E29E433C1 |
treatment provided by |
Felipe |
scientific name |
Kornia fibula |
status |
sp. nov. |
Kornia fibula sp. nov.
urn:lsid:zoobank.org:act:D2D2D504-131B-4342-9CEC-4C8E29E433C1
Figs 25–26 View Fig View Fig ; Tables 15–16 View Table 15 View Table 16
Paragattendorfia View in CoL n. sp. I Korn & Weyer, 2003: 95, pl. 2 figs 20–21.
Paragattendorfia cf. sphaeroides Becker et al., 2021 : text fig. 3n–o.
Gattendorfia cf. crassa View in CoL – Becker 1997: 34, pl. 1 fig. 10.
Diagnosis
Species of Kornia with globular, moderately involute conch (ww/dm ~0.95; uw/dm ~0.15) at 12 mm conch diameter. Growth lines with very deep and wide external sinus.
Etymology
From the Latin ‘ fibula ’ = ‘clasp’, a connotation of the name of the type locality at Oese.
Material examined
Holotype
GERMANY • Rhenish Mountains , Oese , old quarry; Hangenberg Limestone, bed 28; Weyer & Korn 2000 Coll.; illustrated by Korn & Weyer (2003: pl. 2 figs 20–21); re-illustrated here in Fig. 25B View Fig ; MB.C.5260.3 .
Paratypes
GERMANY • 2 specimens; Rhenish Mountains, Oberrödinghausen , railway cutting; Hangenberg Limestone , bed 2a; Weyer 1993–1994 Coll.; MB.C.31069.1–2 • 1 specimen; Rhenish Mountains, Oberrödinghausen , railway cutting; Hangenberg Limestone , bed 3d1b; Weyer 1993–1994 Coll.; MB.C.31070 • 2 specimens; Rhenish Mountains , Oberrödinghausen , railway cutting; Hangenberg Limestone , bed 3d2; Weyer 1993–1994 Coll.; MB.C.31071.1–2 • 3 specimens; Rhenish Mountains , Oese , old quarry; Hangenberg Limestone, bed 22; Weyer & Korn 2000 Coll.; MB.C.5262.2 , MB.C.5262.4 , MB.C.5262.5 • 1 specimen; Rhenish Mountains , Letmathe, between Schälk and Grürmannsheide; Hangenberg Limestone; Denckmann 1901 Coll.; MB.C.1215 .
Description
Holotype MB.C.5260.3 ( Fig. 25B View Fig ), measuring 11.4 mm diameter, has an almost ball-shaped conch with a small umbilicus and a low aperture (ww/dm = 0.94; uw/dm = 0.15; WER = 1.46) and a C-shaped whorl profile. The ornament possesses lamellar growth lines that are strongly rursiradiate in their direction. They form a low dorsolateral projection and already on the inner flank turn back to extend with a deep and wide sinus across the outer flanks and the venter ( Fig. 26B View Fig ).
The larger paratype MB.C.31069.2 ( Fig. 25A View Fig ) with 16 mm conch diameter displays a similar growth line course, but with less strong backward turn. It has a globular, involute conch (ww/dm = 0.87; uw/ dm = 0.11).
The sectioned paratype MB.C.31069.1 allows the study of conch geometry between 4.7 and 19.2 mm diameter ( Fig. 26A View Fig ). During this growth interval, the whorl profile maintains a similar shape. The venter is broad and merges continuously into the convex flanks; the umbilical margin is rounded. The growth trajectories show an almost isometric ontogeny in this growth interval ( Fig. 26C–D View Fig ).
Remarks
Kornia fibula sp. nov. differs from K. acia sp. nov. in the ball-shaped juvenile conch (spindle-shaped in K. acia ) and wider umbilicus at 10 mm conch diameter (uw/dm = 0.15 in K. fibula but only 0.10 in K. acia ). The superficially similar Globimitoceras globiforme differs in the narrower umbilicus (uw/ dm ~ 0.15 in Kornia fibula but only 0.08 in G. globiforme at 10–15 mm dm).
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 fibula
Korn, Dieter & Weyer, Dieter 2023 |
Paragattendorfia
Korn D. & Weyer D. 2003: 95 |
Paragattendorfia cf. sphaeroides
Becker R. T. 1997: 34 |
Gattendorfia cf. crassa
Becker R. T. 1997: 34 |