Chlamydoselachus thomsoni
Richter & Ward, 1990
Classification: Elasmobranchii Hexanchiformes Chlamydoselachidae
Reference of the original description
Fish remains from the Santa Marta Formation (Late Cretaceous) of James Ross Island, Antarctica. Antarctic Science, 2(1), 67–76
Fish remains from the Santa Marta Formation (Late Cretaceous) of James Ross Island, Antarctica. Antarctic Science, 2(1), 67–76
Description:
Citation: Chlamydoselachus thomsoni Richter & Ward, 1990: In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 04/2024
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Distribution Geographic
type locality: western side of San Jose Pass, James Ross Island, locality DJ-261, Antarctica [2044];
other localities: northern part of James Ross Island, Antarctica [1345]; northwestern Hornby Island, British Columbia, Canada (Manning Point and Collishaw Point) [19279];
Distribution of Chlamydosechidae show google map
type locality: western side of San Jose Pass, James Ross Island, locality DJ-261, Antarctica [2044];
other localities: northern part of James Ross Island, Antarctica [1345]; northwestern Hornby Island, British Columbia, Canada (Manning Point and Collishaw Point) [19279];
Distribution of Chlamydosechidae show google map
Distribution Strategraphy
Sheet conglomerates (within ?Beta Member), Santa Marta Formation, Late Cretaceous, Campanian [2044]; Lachman Crags Member, Santa Marta Formation, Late Cretaceous, Campanian [1345]; green to blue-gray shale of the Lambert Formation, late Campanian to early Maastrichtian [19279];
Sheet conglomerates (within ?Beta Member), Santa Marta Formation, Late Cretaceous, Campanian [2044]; Lachman Crags Member, Santa Marta Formation, Late Cretaceous, Campanian [1345]; green to blue-gray shale of the Lambert Formation, late Campanian to early Maastrichtian [19279];
Measurement
median cusp length: 8,53 mm; tooth high: 8,18 mm; rooth length: 6,33 mm; root width: 4,9 mm [2044];
median cusp length: 8,53 mm; tooth high: 8,18 mm; rooth length: 6,33 mm; root width: 4,9 mm [2044];
Material
one tooth (holotype; BAS P.1009)[2044]; 1 tooth (collection nr. IAA-IRJ2000-1, Instituto Antartico Argentino) [1345];
one tooth (holotype; BAS P.1009)[2044]; 1 tooth (collection nr. IAA-IRJ2000-1, Instituto Antartico Argentino) [1345];
Description
Original diagnose after RICHTER & WARD, 1990 [2044]: Chlamydoselachus thomsoni can be separated from all other species of Chlamydoselachus by the combination of he following characters: Stout upright median cusp with coarse continuous anastomosing vertical striae on the labial crown face, very wide cutting edges; fine discontinuous striae on the lingual crown surface; root apically high and labio-lingually short with poorly differentiated root lobes.
Original diagnose after RICHTER & WARD, 1990 [2044]: Chlamydoselachus thomsoni can be separated from all other species of Chlamydoselachus by the combination of he following characters: Stout upright median cusp with coarse continuous anastomosing vertical striae on the labial crown face, very wide cutting edges; fine discontinuous striae on the lingual crown surface; root apically high and labio-lingually short with poorly differentiated root lobes.
Remarks
shark-references Species-ID=1463;
shark-references Species-ID=1463;
References
Pictorial guide to the fossil shark teeth from the Upper Cretaceous of Hornby Island, British Columbia, Canada. Digital Production W.A. HESSIN, p. 1–35.
Late Cretaceous Antarctic fish diversity. from: FRANCIS, J. E., PIRRIE, D. & CRAME, J.A. (Eds) 2006. Cretaceous–Tertiary High–Latitude Palaeoenvironments, James Ross Basin, Antarctica. Geological Society, London, Special Publications, 258: 83–100
Fish remains from the Santa Marta Formation (Late Cretaceous) of James Ross Island, Antarctica. Antarctic Science, 2(1), 67–76
DOI: 10.1017/S0954102090000074
Pictorial guide to the fossil shark teeth from the Upper Cretaceous of Hornby Island, British Columbia, Canada. Digital Production W.A. HESSIN, p. 1–35.
Late Cretaceous Antarctic fish diversity. from: FRANCIS, J. E., PIRRIE, D. & CRAME, J.A. (Eds) 2006. Cretaceous–Tertiary High–Latitude Palaeoenvironments, James Ross Basin, Antarctica. Geological Society, London, Special Publications, 258: 83–100
Fish remains from the Santa Marta Formation (Late Cretaceous) of James Ross Island, Antarctica. Antarctic Science, 2(1), 67–76
DOI: 10.1017/S0954102090000074
