Bythiacanthus lopesi
Figueroa & Gallo, 2017
Classification: Elasmobranchii Ctenacanthiformes Heslerodidae
Reference of the original description
New chondrichthyan fin spines from the Pedra de Fogo Formation, Brazil. Journal of South American Earth Sciences, 76, 389–396
New chondrichthyan fin spines from the Pedra de Fogo Formation, Brazil. Journal of South American Earth Sciences, 76, 389–396
Description:
Citation: Bythiacanthus lopesi Figueroa & Gallo, 2017: In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 08/2026
Description
Original diagnosis after Figueroa & Gallo, 2017 [25212]: Chondrichthyan only by a fin spine with a rhomboidal shape in lateral view, extremely compressed laterally and lacking marked curvature in the anteroposterior direction; convex posterior face, especially near the posterior closure; denticles absent on the posterolateral margins of the spine; flat lateral faces; long basal profile, almost of the same length of the posterior profile; relatively small intramuscular portion; anterior face formed by an isolated nodose ridge; ornamentation of longitudinal ridges formed by tubercles elongated distally and more evident proximally.
Original diagnosis after Figueroa & Gallo, 2017 [25212]: Chondrichthyan only by a fin spine with a rhomboidal shape in lateral view, extremely compressed laterally and lacking marked curvature in the anteroposterior direction; convex posterior face, especially near the posterior closure; denticles absent on the posterolateral margins of the spine; flat lateral faces; long basal profile, almost of the same length of the posterior profile; relatively small intramuscular portion; anterior face formed by an isolated nodose ridge; ornamentation of longitudinal ridges formed by tubercles elongated distally and more evident proximally.
Remarks
shark-references Species-ID=14875;
shark-references Species-ID=14875;
References
Rise and diversification of chondrichthyans in the Paleozoic. Paleobiology, 50(2), 271–284
DOI: 10.1017/pab.2024.1
The Paleozoic ichthyofauna of the Amazonas and Parnaíba basins, Brazil. Journal of South American Earth Sciences, 82, 122–132
DOI: 10.1016/j.jsames.2018.01.001
New chondrichthyan fin spines from the Pedra de Fogo Formation, Brazil. Journal of South American Earth Sciences, 76, 389–396
DOI: 10.1016/j.jsames.2017.03.015
Rise and diversification of chondrichthyans in the Paleozoic. Paleobiology, 50(2), 271–284
DOI: 10.1017/pab.2024.1
The Paleozoic ichthyofauna of the Amazonas and Parnaíba basins, Brazil. Journal of South American Earth Sciences, 82, 122–132
DOI: 10.1016/j.jsames.2018.01.001
New chondrichthyan fin spines from the Pedra de Fogo Formation, Brazil. Journal of South American Earth Sciences, 76, 389–396
DOI: 10.1016/j.jsames.2017.03.015
