Parvodus graciliani
Ribeiro & de França, 2025
Classification: Elasmobranchii Hybodontiformes Lonchidiidae
Reference of the original description
A new species of Lonchidiidae (Hybodontiformes) from the Late Jurassic of Brazil (Aliança Formation, Jatobá Basin). Anatomical Record-Advances In Integrative Anatomy and Evolutionary Biology, in press
A new species of Lonchidiidae (Hybodontiformes) from the Late Jurassic of Brazil (Aliança Formation, Jatobá Basin). Anatomical Record-Advances In Integrative Anatomy and Evolutionary Biology, in press
Description:
Citation: Parvodus graciliani Ribeiro & de França, 2025: In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 04/2026
Description
Diagnosis after Ribeiro & de França, 2025 [35493]: Parvodus graciliani sp. nov. is distinguished by the following combination of characters (synapomorphies of Parvodus denoted by a cross [†]; autapomorphic states of P. graciliani sp. nov. denoted by an asterisk [*]): (1) teeth with a rounded labial protuberance extending beyond the crown margin and reaching the crown-root junction (†); (2) smooth labial surface of the crown, with a single vertical ridge extending from the apex of the main cusp to the central portion of the cusp (*), and terminating at the labial protuberance; (3) some teeth bear a “hook”-shaped projection on the distal portion of the protuberance (*); (4) lingual surface of the main cusp lacking a protuberance (†); (5) lingual surface ornamented with horizontal folds on the crown shoulder of the crown, reaching the lateral cusplets (†).
Diagnosis after Ribeiro & de França, 2025 [35493]: Parvodus graciliani sp. nov. is distinguished by the following combination of characters (synapomorphies of Parvodus denoted by a cross [†]; autapomorphic states of P. graciliani sp. nov. denoted by an asterisk [*]): (1) teeth with a rounded labial protuberance extending beyond the crown margin and reaching the crown-root junction (†); (2) smooth labial surface of the crown, with a single vertical ridge extending from the apex of the main cusp to the central portion of the cusp (*), and terminating at the labial protuberance; (3) some teeth bear a “hook”-shaped projection on the distal portion of the protuberance (*); (4) lingual surface of the main cusp lacking a protuberance (†); (5) lingual surface ornamented with horizontal folds on the crown shoulder of the crown, reaching the lateral cusplets (†).
Remarks
shark-references Species-ID=17779
shark-references Species-ID=17779
References
A new species of Lonchidiidae (Hybodontiformes) from the Late Jurassic of Brazil (Aliança Formation, Jatobá Basin). Anatomical Record-Advances In Integrative Anatomy and Evolutionary Biology, in press
DOI: 10.1002/ar.70120
A new species of Lonchidiidae (Hybodontiformes) from the Late Jurassic of Brazil (Aliança Formation, Jatobá Basin). Anatomical Record-Advances In Integrative Anatomy and Evolutionary Biology, in press
DOI: 10.1002/ar.70120
