Cretorectolobus olsoni

CASE, 1978


Classification: Elasmobranchii Orectolobiformes Orectolobidae

Reference of the original description
CASE, G.R. (1978)
A new selachian fauna from the Judith River Formation (Campanian) of Montana. Palaeontographica, Abt. A, 160 (1–6): 176–205, 16 fig., 6 pl., 3 tabl.

Types
Cretorectolobus olsoni
Holotype: USTL: MTA 9; Paratype: USTL: MTA 10;


Description:


Citation: Cretorectolobus olsoni CASE, 1978: In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 06/2021

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Description
Original diagnose after Case (1978) p. 188 [388]: Teeth small to medium size, ranging from 2 mm up to 5 mm, crown is low, and its cusp is directed towards the interior of the jaw, vestigial cusplets on wide lateral buttresses, and a low uvula overhanging the root area on the labial aspect.

Remarks
type species of Cretorectolobus Case, 1978, p. 188 [388] by original designation (Art. 68.2 ICZN);

valid after Case (1978) p. 185 [388]; Hoganson et al. (2019) p. 21 [27441];

synonym of Cederstroemia triangulata after Siverson (1995) p. 976 (Case, 1978, p. 188 [388] [partim], Pl. 3, fig. 2, text-fig. 10a, non PI. 3, fig. 1, text-figs. 9, 10b; Cappetta, 1987 [338], p. 74 [partim], text-fig. 68a-c, non fig. d-g.)) [2215];

valid after Siverson (1995) p. 977 [2215] (Case, 1978 [388], p. 188 [partim],P 1. 3, fig. 1, textfigs. 9, 10b,n on text-fig. 10a, P 1.3 , fig. 2 (Cederstroemiatr iangulata); Case, 1987, p. 18 [partim], P1. 8, fig. 6, non, P1. 8, figs. 1, 3-5, 7 (Squatina sp.), and 2 (Cederstroemia sp.); Cappetta, 1987 [338], p. 74 [partim], fig. 68d-g, non a-c (Cederstroemia triangulata);


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
BRINKMAN, D.B. & BRAMAN, D.R. & NEUMAN, A.G. & RALRICK, P.E. & SATO, T. (2005)
A Vertebrate Assemblage from the Marine Shales of the Lethbridge Coal Zone. In P. J. Currie and E. B. Koppelhus (eds.) Dinosaur Provincial Park, A spectacular ancient ecosystem revealed. Indiana University Press, Bloomington and Indianapolis, Indiana: 486–500
BEAVAN, N.R. & RUSSELL, A.P. (1999)
An elasmobranch assemblage from the terrestrial-marine transitional Lethbridge Coal Zone (Dinosaur Park Formation: Upper Campanian), Alberta, Canada. Journal of Paleontology, 73 (3): 494–503
SIVERSON, M. (1995)
Revision of Cretorectolobus (Neoselachii) and description of Cederstroemia n. gen., a Cretaceous carpet shark (Orectolobiformes) with a cutting dentition. Journal of Paleontology, 69 (5): 974–979, 3 fig.
CASE, G.R. (1987)
A new selachian fauna from the Late Campanian of Wyoming (Teapot Sandstone Member, Mesaverde Formation, Big Horn Basin). Palaeontographica, Abt. A, 197 (1–3): 1–37, 12 fig., 15 pl., 3 tabl.
CASE, G.R. (1978)
A new selachian fauna from the Judith River Formation (Campanian) of Montana. Palaeontographica, Abt. A, 160 (1–6): 176–205, 16 fig., 6 pl., 3 tabl.