Scymnodalatias kazenobon
Nishimatsu & Ujihara, 2019
Classification: Elasmobranchii Squaliformes Somniosidae
Reference of the original description
A New Deep-Sea Shark Scymnodalatias kazenobon (Squaliformes, Somniosidae) from the Miocene Yatsuo Group in Central Japan. Paleontological Research, 23(1), 23–29
A New Deep-Sea Shark Scymnodalatias kazenobon (Squaliformes, Somniosidae) from the Miocene Yatsuo Group in Central Japan. Paleontological Research, 23(1), 23–29
Description:
Citation: Scymnodalatias kazenobon Nishimatsu & Ujihara, 2019: In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 04/2024
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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.
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.
References
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
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
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
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
