Hexanchus hookeri
Ward, 1979
Classification: Elasmobranchii Hexanchiformes Hexanchidae
Reference of the original description
Additions to the fish fauna of the English Palaeogene. 3. A review of the Hexanchid sharks with a description of four new species. Tertiary Research, 2(3), 111–129
Additions to the fish fauna of the English Palaeogene. 3. A review of the Hexanchid sharks with a description of four new species. Tertiary Research, 2(3), 111–129
Description:
Citation: Hexanchus hookeri Ward, 1979: In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 05/2024
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Hexanchus hookeri Ward, 1979; Early Eocene, Ypresian, Tolagaysor Formation, Aktolagay Plateau, Aktobe region, Kazakhstan. Collection and © Adam Anderson
Hexanchus hookeri Ward, 1979; Early Eocene, Ypresian, Tolagaysor Formation, Aktolagay Plateau, Aktobe region, Kazakhstan. Collection and © Adam Anderson
Description
Original diagnose after Ward (1979) p. 116 [2493]: Hexanchus having small teeth, (not exceeding 20 mm. in length) approximately one and a half times as long as high. Principal cusp distinctly larger than first distal cusplet with coarse serrations at the base of the mesial cutting edge. MesiaI and distal cutting edges of distal cusplets straight.
Original diagnose after Ward (1979) p. 116 [2493]: Hexanchus having small teeth, (not exceeding 20 mm. in length) approximately one and a half times as long as high. Principal cusp distinctly larger than first distal cusplet with coarse serrations at the base of the mesial cutting edge. MesiaI and distal cutting edges of distal cusplets straight.
Remarks
shark-references Species-ID=2858;
valid after Ward (1979) p. 115 [2493]; Adnet & Martin (2007) p. 284 [22];
shark-references Species-ID=2858;
valid after Ward (1979) p. 115 [2493]; Adnet & Martin (2007) p. 284 [22];
References
Increase of body size in sixgill sharks with change in diet as a possible background of their evolution. Historical Biology, 19(4), 279–289
DOI: 10.1080/08912960701194461
Biometric analysis of the teeth of fossil and Recent hexanchid sharks and its taxonomic implications. Acta Palaeontologica Polonica, 51(3), 477–488
Elasmobranch teeth (Vertebrata, Pisces) from the Dongen Formation (Eocene) in the Netherlands. Mededelingen Van De Werkgroep Voor Tertiaire En Kwartaire Geologie, 22(2), 73–122
Fossil sharks, rays and chimaeroids of the English Tertiary period. Gosport Museum, 1–47, 10 fig., 3 tabl., 16 pl.
Increase of body size in sixgill sharks with change in diet as a possible background of their evolution. Historical Biology, 19(4), 279–289
DOI: 10.1080/08912960701194461
Biometric analysis of the teeth of fossil and Recent hexanchid sharks and its taxonomic implications. Acta Palaeontologica Polonica, 51(3), 477–488
Elasmobranch teeth (Vertebrata, Pisces) from the Dongen Formation (Eocene) in the Netherlands. Mededelingen Van De Werkgroep Voor Tertiaire En Kwartaire Geologie, 22(2), 73–122
Fossil sharks, rays and chimaeroids of the English Tertiary period. Gosport Museum, 1–47, 10 fig., 3 tabl., 16 pl.
