Mesetaraja maleficapelli

ENGELBRECHT, MORS, REGUERO & KRIWET, 2019


Classification: Elasmobranchii Rajiformes Rajidae

Reference of the original description
ENGELBRECHT, A. & MORS, T. & REGUERO, M.A. & KRIWET, J. (2019)
Skates and rays (Elasmobranchii, Batomorphii) from the Eocene La Meseta and Submeseta formations, Seymour Island, Antarctica. Historical Biology, 31 (8): 1028-1044

Types
Mesetaraja maleficapelli
Holotype: NRM-PZ: P16250;


Description:


Citation: Mesetaraja maleficapelli ENGELBRECHT, MORS, REGUERO & KRIWET, 2019: In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 05/2021

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Description
Original diagnose after Engelbrecht et al. (2019) p. 1037 [27541]: Extinct rajid known only by a single tooth that is characterized by the following combination of dental characteristics: small tooth (approximately 1 mm wide); crown wider than root; crown completely smooth and consists of a labio-lingually broad but mesio-distally narrow cusp with accessory labial and lingual apices that are arranged labio-lingually (central one being the highest); cusp and accessory cusplets give cusp a ragged profile; anterior accessory cusplet slightly hook-shaped; basal crown face asymmetrical and ovate; short, broad and rounded labial apron; distinct lingual uvula absent; basal crown base forms a slightly convex rim around cusp.

Remarks
type species of Mesetaraja Engelbrecht et al., 2019 p. 1037 [27541] by original designation (Art. 68.2 ICZN);

valid after Engelbrecht et al. (2019) p. 1037 [27541];


References
ENGELBRECHT, A. & MORS, T. & REGUERO, M.A. & KRIWET, J. (2019)
Skates and rays (Elasmobranchii, Batomorphii) from the Eocene La Meseta and Submeseta formations, Seymour Island, Antarctica. Historical Biology, 31 (8): 1028-1044
DOI: 10.1080/08912963.2017.1417403