Macrorhizodus cf. nolfi
Zhelezko, 1999
Classification: Elasmobranchii Lamniformes Lamnidae
Reference of the original description
Elasmobranhii i biostratigraphia paleogena Zauralia i Srednei Asii. (Elasmobranchii and Palaeogene biostratigraphy of Transural and Central Asia). Materialy po Stratigrafii i Paleontologii Urala, 3, 324 pp, Ekaterinburg, UrO RAN
Elasmobranhii i biostratigraphia paleogena Zauralia i Srednei Asii. (Elasmobranchii and Palaeogene biostratigraphy of Transural and Central Asia). Materialy po Stratigrafii i Paleontologii Urala, 3, 324 pp, Ekaterinburg, UrO RAN
Types
Macrorhizodus cf. nolfi
Macrorhizodus cf. nolfi
Description:
Citation: Macrorhizodus cf. nolfi Zhelezko, 1999: In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 08/2026
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Description
Original diagnosis after Zhelezko, 1999 [2658] (translated from russian via AI): Dental apparatus of tearing-cutting type. Roots of anterior teeth arched, moderately thick; root branches rounded, of medium length, tapered at the ends. Central protuberance low, gradually transitioning to the weakly convex surface of the branches. Lateral cusplets small, spiniform, often reduced.
Roots of lateral and posterior teeth of upper and lower jaws flat or with a low arch; central protuberance not pronounced. Branches wide, flat on the inner side. Crowns cutting, in overall shape approaching an isosceles triangle.
Lateral denticles numbering one or two pairs, triangular-blade-like, on many teeth with clearly pronounced signs of reduction. Denticles confluent-accessory (fused-adnate). Isthmus (bridge) narrow, constricted. Cutting edge as a rule uninterrupted (not broken).
Original diagnosis after Zhelezko, 1999 [2658] (translated from russian via AI): Dental apparatus of tearing-cutting type. Roots of anterior teeth arched, moderately thick; root branches rounded, of medium length, tapered at the ends. Central protuberance low, gradually transitioning to the weakly convex surface of the branches. Lateral cusplets small, spiniform, often reduced.
Roots of lateral and posterior teeth of upper and lower jaws flat or with a low arch; central protuberance not pronounced. Branches wide, flat on the inner side. Crowns cutting, in overall shape approaching an isosceles triangle.
Lateral denticles numbering one or two pairs, triangular-blade-like, on many teeth with clearly pronounced signs of reduction. Denticles confluent-accessory (fused-adnate). Isthmus (bridge) narrow, constricted. Cutting edge as a rule uninterrupted (not broken).
Remarks
shark-references Species-ID=14214;
shark-references Species-ID=14214;
References
A study of the sharks and rays from the Lillebælt Clay (Early–Middle Eocene) of Denmark, and their palaeoecology. Bulletin of the Geological Society of Denmark, 62, 39–88
DOI: 10.37570/bgsd-2014-62-04
A study of the sharks and rays from the Lillebælt Clay (Early–Middle Eocene) of Denmark, and their palaeoecology. Bulletin of the Geological Society of Denmark, 62, 39–88
DOI: 10.37570/bgsd-2014-62-04
