Pristiophorus humboldti

Villafaña, Nielsen, Klug & Kriwet, 2019


Classification: Elasmobranchii Pristiophoriformes Pristiophoridae

Reference of the original description
Villafaña, J.A. & Nielsen, S.N. & Klug, S. & Kriwet, J. (2019)
Early Miocene cartilaginous fishes (Chondrichthyes: Holocephali, Elasmobranchii) from Chile: Diversity and palaeobiogeographic implications. Journal of South American Earth Sciences, 96, Article 102317

Types
Pristiophorus humboldti
Holotype: SGO: PV 1307; Paratype: SGO: PV 1308; SGO: PV 1309; SGO: PV 1310;

Images of types

Description:


Citation: Pristiophorus humboldti Villafaña, Nielsen, Klug & Kriwet, 2019: In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 01/2023

Please send your images of "Pristiophorus humboldti" to info@shark-references.com

Pristiophorus humboldti sp. nov., [Holotype: SGO.PV 1307(A–D), Paratypes: SGO.PV 1308 [(E–G), SGO.PV 1309 (H–J)] from the early Miocene marine deposits of the Navidad Formation at the Punta Perro site (PPN), Cardenal Caro Province, O'Higgins Region, Chile. A, H labial view; B, G, J occlusal view; C, I lingual view; D profile view; E anterior view; F dorsal view. Scale bar equals 500 μm. © Villafaña (2019)

Description
Original diagnose after Villafaña et al. (2019) p. 5-6 [27515]: The new species of Pristiophorus is characterized by a combination of the following dental characters: In labial view, the tooth displays a high, slender and pointed principal cusp, the crown shoulder is comparably low. The cusp is slightly curved lingually. Tooth crown labio-lingually narrow. The enameloid surface is completely smooth in labial view, however, weak and oblique ridges are present lingually on the crown shoulders. The cutting edge is well-developed reaching far up the cusp, not reaching the lateral edges of the crown shoulders. In lingual view, the distal and mesial parts of the crown exhibit broad and slightly concave shoulders with distinct cutting edge. Additional, horizontal to oblique ridges are present on the lingual crown shoulders that meet laterally, forming a defined, shallow depression distinguishing teeth of this species from all other known species. The apron is low and broad with a semicircular labial edge. The uvula is short and broad.

Remarks
valid after Villafaña et al. (2019) p. 5 [27515];


References
Villafaña, J.A. & Nielsen, S.N. & Klug, S. & Kriwet, J. (2019)
Early Miocene cartilaginous fishes (Chondrichthyes: Holocephali, Elasmobranchii) from Chile: Diversity and palaeobiogeographic implications. Journal of South American Earth Sciences, 96, Article 102317
DOI: 10.1016/j.jsames.2019.102317