Cretalamna feldmanni

HOGANSON, ERICKSON & HOLLAND, 2019


Classification: Elasmobranchii Lamniformes Otodontidae

Reference of the original description
HOGANSON, J.W. & ERICKSON, M. & HOLLAND, F.D. (2019)
Chondrichthyan and Osteichthyan Paleofaunas from the Cretaceous (Late Maastrichtian) Fox Hills Formation of North Dakota, USA: Paleoecology, Paleogeography, and Extinction. Bulletins of American Paleontology, 398: 1-94

Types
Cretalamna feldmanni
Holotype: UND: PC 15903;

Images of types

Description:


Citation: Cretalamna feldmanni HOGANSON, ERICKSON & HOLLAND, 2019: In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 06/2021

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Cretalamna feldmanni sp. nov.,holotype, upper left lateral (UND-PC 15903); 8.5, labial view; 8.6, lingual view © Hoganson et al. (2019)

Description
Original diagnose after Hoganson et al. (2019) p. 25 [27441]: Known only from upper left lateral tooth characterized by prominent central cusp flanked on each side by single well-developed cusplets possessing basal extensions of the enamel cutting surface just beyond the edge of the root. Entire crown margin is a smooth cutting edge having cusplets separated from cusp only by deep groove that is nearly covered by enamel at top of cusps. Entire crown surface is nonstriated. Upper one-third of cusp gently flexed lingually, no prominent central lingual bulge. Root with insignificant central foramen. Root has characteristic quadrate shape formed by distinct, straight-sided lobes at anterior and posterior tips, anterior being longer, from which lower margins of root converge on mesial position of the root, forming distinct straight V-shaped lower edge of tooth. Tooth large, only slightly wider than long.

Remarks
valid after Hoganson et al. (2019) p. 25 [27441];


References
HOGANSON, J.W. & ERICKSON, M. & HOLLAND, F.D. (2019)
Chondrichthyan and Osteichthyan Paleofaunas from the Cretaceous (Late Maastrichtian) Fox Hills Formation of North Dakota, USA: Paleoecology, Paleogeography, and Extinction. Bulletins of American Paleontology, 398: 1-94