Scymnodalatias kazenobon

NISHIMATSU & UJIHARA, 2019


Classification: Elasmobranchii Squaliformes Somniosidae

Reference of the original description
NISHIMATSU, K. & UJIHARA, A. (2019)
A New Deep-Sea Shark Scymnodalatias kazenobon (Squaliformes, Somniosidae) from the Miocene Yatsuo Group in Central Japan. Paleontological Research, 23 (1): 23-29

Types
Scymnodalatias kazenobon
Holotype: NUUL: 127; Paratype: NUUL: 128;


Description:


Citation: Scymnodalatias kazenobon NISHIMATSU & UJIHARA, 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 Nishimatsu & Ujihara (2019) p. 24 [26949]: Lower tooth height much greater than width. Cusp rather upright, thin, and narrow, and triangular with straight edges. Apex of cusp sharp. Distal heel high, narrow, well differentiated, and semicircular. Distal heel forming distinct V-shaped notch where it meets main cusp. On labial face, wide flat apron extending to root basal edge. Several large foramina located at mesial and distal sides of apron. Large foramen opening above basal notch. On lingual face, straight and well-marked lingual bulge developing, and distinct central foramen situated below short uvula. One large mesio-lingual foramen opening on mesial side of central foramen. Shallow medio-lingual duct extending from central foramen to lower notch. Lower notch shallow. Base of root almost straight, except for central notch.

Remarks
valid after Nishimatsu & Ujihara (2019) p. 24 [26949];


References
NISHIMATSU, K. & UJIHARA, A. (2020)
Deep-sea elasmobranch fauna with the first descriptions of genera Arynchobatis and Pseudoraja from the Miocene Yatsuo group in Toyama, central Japan. Historical Biology, 32 (8): 1120-1142
DOI: 10.1080/08912963.2019.1566325
NISHIMATSU, K. & UJIHARA, A. (2019)
A New Deep-Sea Shark Scymnodalatias kazenobon (Squaliformes, Somniosidae) from the Miocene Yatsuo Group in Central Japan. Paleontological Research, 23 (1): 23-29
DOI: 10.2517/2018PR006