Hemipristis tanakai
Tomita, Yabumoto & Kuga, 2023
Classification: Elasmobranchii Carcharhiniformes Hemigaleidae
Reference of the original description
A New Snaggletooth Shark Species, Hemipristis tanakai Sp. Nov., from the Ashiya Group (Oligocene), Northern Kyushu, Japan. Paleontological Research, 28(3), 273–278
A New Snaggletooth Shark Species, Hemipristis tanakai Sp. Nov., from the Ashiya Group (Oligocene), Northern Kyushu, Japan. Paleontological Research, 28(3), 273–278
Description:
Citation: Hemipristis tanakai Tomita, Yabumoto & Kuga, 2023: In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 08/2026
Description
Original diagnosis after Tomita, Yabumoto & Kuga, 2023 [32471]: Hemipristis tanakai sp. nov. is distinguished from other congeners based on the presence of the following characters: the height of the upper jaw tooth exceeds 1.5 cm; the number of mesial serrations is less than five; and the apical-most denticle of the mesial serrations is more distantly located from the baseline of the root compared with that of the distal serrations (refer to the “comparison” section for details).
Original diagnosis after Tomita, Yabumoto & Kuga, 2023 [32471]: Hemipristis tanakai sp. nov. is distinguished from other congeners based on the presence of the following characters: the height of the upper jaw tooth exceeds 1.5 cm; the number of mesial serrations is less than five; and the apical-most denticle of the mesial serrations is more distantly located from the baseline of the root compared with that of the distal serrations (refer to the “comparison” section for details).
Remarks
shark-references Species-ID=16588
shark-references Species-ID=16588
References
Paleozoic, Mesozoic and Cenozoic Chondrichthyes from the Japanese Islands. National Museum of Nature and Science Monographs, 56, 1–184
A New Snaggletooth Shark Species, Hemipristis tanakai Sp. Nov., from the Ashiya Group (Oligocene), Northern Kyushu, Japan. Paleontological Research, 28(3), 273–278
DOI: 10.2517/PR220021
New tropical carcharhinids (Chondrichthyes, Carcharhiniformes) from the late Eocene-early Oligocene of Balochistan, Pakistan: Paleoenvironmental and paleogeographic implications. Journal of Asian Earth Sciences, 30, 303–323
DOI: 10.1016/j.jseaes.2006.10.002
Paleozoic, Mesozoic and Cenozoic Chondrichthyes from the Japanese Islands. National Museum of Nature and Science Monographs, 56, 1–184
A New Snaggletooth Shark Species, Hemipristis tanakai Sp. Nov., from the Ashiya Group (Oligocene), Northern Kyushu, Japan. Paleontological Research, 28(3), 273–278
DOI: 10.2517/PR220021
New tropical carcharhinids (Chondrichthyes, Carcharhiniformes) from the late Eocene-early Oligocene of Balochistan, Pakistan: Paleoenvironmental and paleogeographic implications. Journal of Asian Earth Sciences, 30, 303–323
DOI: 10.1016/j.jseaes.2006.10.002
