Dalatias orientalis
Malyshkina, 2022
Classification: Elasmobranchii Squaliformes Dalatiidae
Reference of the original description
Miocene Elasmobranchii from the Duho Formation, South Korea. Historical Biology, 35(9), 1726–1741
Miocene Elasmobranchii from the Duho Formation, South Korea. Historical Biology, 35(9), 1726–1741
Types
Dalatias orientalis
Holotype: GNUE: 32917; Paratype: CNUNHM: F392; CNUNHM: F279; CNUNHM: F527; SMNH: FO-588;
Dalatias orientalis
Holotype: GNUE: 32917; Paratype: CNUNHM: F392; CNUNHM: F279; CNUNHM: F527; SMNH: FO-588;
Description:
Citation: Dalatias orientalis Malyshkina, 2022: In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 08/2026
Description
Original diagnosis after Malyshkina, 2022 [31076]: The teeth are relatively wide mesio-distally. The mesial cutting edge is slightly concave, forming a depression in the lower third of the crown. The distal cutting edge is convex or straight. The mesial curve of the crown is sharp. The mesial protrusion of the root is large, protruding beyond the mesial edge of the crown. The outer edge of the distal lobe of the apron is concave. The mesial lobe of the apron is wider and longer than the distal one. The uvula on the lingual side of the crown is well defined. The cutting edge of the crown, including the distal heel, is finely serrated. The outer corners of the root branches are rounded. Gradient monognatic heterodonty is present.
Original diagnosis after Malyshkina, 2022 [31076]: The teeth are relatively wide mesio-distally. The mesial cutting edge is slightly concave, forming a depression in the lower third of the crown. The distal cutting edge is convex or straight. The mesial curve of the crown is sharp. The mesial protrusion of the root is large, protruding beyond the mesial edge of the crown. The outer edge of the distal lobe of the apron is concave. The mesial lobe of the apron is wider and longer than the distal one. The uvula on the lingual side of the crown is well defined. The cutting edge of the crown, including the distal heel, is finely serrated. The outer corners of the root branches are rounded. Gradient monognatic heterodonty is present.
Remarks
shark-references Species-ID=16361;
shark-references Species-ID=16361;
References
Bioluminescence and repeated deep-sea colonization shaped the diversification and body size evolution of squaliform sharks. Proceedings of the Royal Society B-Biological Sciences, 292(2042), Article 20242932
DOI: 10.1098/rspb.2024.2932
Miocene Elasmobranchii from the Duho Formation, South Korea. Historical Biology, 35(9), 1726–1741
DOI: 10.1080/08912963.2022.2110870
First Deep-Sea Shark Fossil Teeth from the Miocene of South Korea. Zoodiversity, 55(3), 225–232
DOI: 10.15407/zoo2021.03.225
Bioluminescence and repeated deep-sea colonization shaped the diversification and body size evolution of squaliform sharks. Proceedings of the Royal Society B-Biological Sciences, 292(2042), Article 20242932
DOI: 10.1098/rspb.2024.2932
Miocene Elasmobranchii from the Duho Formation, South Korea. Historical Biology, 35(9), 1726–1741
DOI: 10.1080/08912963.2022.2110870
First Deep-Sea Shark Fossil Teeth from the Miocene of South Korea. Zoodiversity, 55(3), 225–232
DOI: 10.15407/zoo2021.03.225
