Stethacanthus concavus
Ginter, 2018
Classification: Holocephali Symmoriiformes Symmoriidae
Reference of the original description
Symmoriiform sharks from the Pennsylvanian of Nebraska. Acta Geologica Polonica, 68(3), 391–401
Symmoriiform sharks from the Pennsylvanian of Nebraska. Acta Geologica Polonica, 68(3), 391–401
Description:
Citation: Stethacanthus concavus Ginter, 2018: In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 08/2026
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Description
Original diagnosis after Ginter, 2018 [26586]: Symmoriiform shark with the following combination of dental features: five-cuspid crown composed of a long and slender median cusp, lingually convex and slightly flattened labially, covered with subdued, dense, subparallel cristae up to three-fourth of its height, and two pairs of small lateral cusplets, not higher than one-fourth of the median cusp; reniform to rectangular base with a short, crescentic button on the orolingual side, perforated in the middle by a foramen leading to the main basal canal, and a corresponding to it short, labially concave basolabial ridge.
Original diagnosis after Ginter, 2018 [26586]: Symmoriiform shark with the following combination of dental features: five-cuspid crown composed of a long and slender median cusp, lingually convex and slightly flattened labially, covered with subdued, dense, subparallel cristae up to three-fourth of its height, and two pairs of small lateral cusplets, not higher than one-fourth of the median cusp; reniform to rectangular base with a short, crescentic button on the orolingual side, perforated in the middle by a foramen leading to the main basal canal, and a corresponding to it short, labially concave basolabial ridge.
Remarks
shark-references Species-ID=15152;
shark-references Species-ID=15152;
References
Rise and diversification of chondrichthyans in the Paleozoic. Paleobiology, 50(2), 271–284
DOI: 10.1017/pab.2024.1
Symmoriiform sharks from the Pennsylvanian of Nebraska. Acta Geologica Polonica, 68(3), 391–401
DOI: 10.1515/agp-2018-0009
Rise and diversification of chondrichthyans in the Paleozoic. Paleobiology, 50(2), 271–284
DOI: 10.1017/pab.2024.1
Symmoriiform sharks from the Pennsylvanian of Nebraska. Acta Geologica Polonica, 68(3), 391–401
DOI: 10.1515/agp-2018-0009
