Raja amphitrita

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
Raja amphitrita
Holotype: NRM-PZ: P16264; Paratype: NRM-PZ: P16259; NRM-PZ: P16260; NRM-PZ: P16261; NRM-PZ: P16262; NRM-PZ: P16263; NRM-PZ: P16258;


Description:


Citation: Raja amphitrita ENGELBRECHT, MORS, REGUERO & KRIWET, 2019: In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 03/2021

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Description
Original diagnose after Engelbrecht et al. (2019) p. 1034 [27541]: Extinct skate only known by isolated teeth that are characterized by the following combination of dental characters: small, cuspidate teeth; high, symmetrical and triangular crown with smooth labial and lingual crown faces; cusp straight to slightly bent towards the posterior; knob-like structure on basal labial crown face; short cutting edges, which are restricted to the upper part of the cusp; lower part of the crown forms a rounded rim extending from the mesial to the distal side of the tooth; distal crown edge concave and mesial crown edge convex to slightly sigmoidal; no labial apron or lingual uvula; high root with root lobes separated by a rather wide but shallow furrow; basal face of the root lobes convex.

Remarks
valid after Engelbrecht et al. (2019) p. 1032 [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