Fairchildodus rioclarensis
Chahud, 2023
Classification: Holocephali
Reference of the original description
Holocephali from the Irati Formation (Paraná Basin), Brazil: Origin, paleogeographical and paleoenvironmental considerations. Estudios Geologicos, 79(2), Article e155
Holocephali from the Irati Formation (Paraná Basin), Brazil: Origin, paleogeographical and paleoenvironmental considerations. Estudios Geologicos, 79(2), Article e155
Description:
Citation: Fairchildodus rioclarensis Chahud, 2023: 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 Chahud, 2023 [32489]: Elasmobranchii known only by the teeth. High crown, without cusps, elongated in lingual-labial direction. Thickness of the base (root) equal to or less than the crown. The sides of the tooth perpendicular to the labial and lingual faces have a triangular-shape with the central region of the triangle being convex on one side and concave on the opposite side. Row teeth touching each other but do not form dental plates. Apex longitudinal ridge separates the labial and lingual faces, which form an acute angle.
Original diagnosis after Chahud, 2023 [32489]: Elasmobranchii known only by the teeth. High crown, without cusps, elongated in lingual-labial direction. Thickness of the base (root) equal to or less than the crown. The sides of the tooth perpendicular to the labial and lingual faces have a triangular-shape with the central region of the triangle being convex on one side and concave on the opposite side. Row teeth touching each other but do not form dental plates. Apex longitudinal ridge separates the labial and lingual faces, which form an acute angle.
Remarks
shark-references Species-ID=16591;
type species of Fairchildodus Chahud, 2023 [32489] by monotypy (Art. 68.3 ICZN);
shark-references Species-ID=16591;
type species of Fairchildodus Chahud, 2023 [32489] by monotypy (Art. 68.3 ICZN);
References
Holocephali from the Irati Formation (Paraná Basin), Brazil: Origin, paleogeographical and paleoenvironmental considerations. Estudios Geologicos, 79(2), Article e155
DOI: 10.3989/egeol.44987.632
Holocephali from the Irati Formation (Paraná Basin), Brazil: Origin, paleogeographical and paleoenvironmental considerations. Estudios Geologicos, 79(2), Article e155
DOI: 10.3989/egeol.44987.632
