Cederstroemia siverssoni

GUINOT, UNDERWOOD, CAPPETTA & WARD, 2013


Classification: Elasmobranchii Orectolobiformes Orectolobidae

Reference of the original description
GUINOT, G. & UNDERWOOD, C.J. & CAPPETTA, H. & WARD, D.J. (2013)
Sharks (Elasmobranchii: Euselachii) from the Late Cretaceous of France and the UK. Journal of Systematic Palaeontology, 11 (6): 589–671

Synonyms / new combinations and misspellings
Cederstroemia cf. siverssoni

Types
Cederstroemia siverssoni
Holotype: USTL: JUH2-21;


Description:


Citation: Cederstroemia siverssoni GUINOT, UNDERWOOD, CAPPETTA & WARD, 2013: In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 06/2021

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Description
Original diagnose after Guinot et al. (2013) p. 619 [24889]: Orectolobiform with gradient monognathic and possible dignathic heterodonty. Teeth as high as wide in anterior files, gradually broader than high in more lateral files. Low and bulky triangular cusp broadly united to heels. High heels sub-horizontal in anterior teeth and strongly inclined in lateral and posteriors; well-developed cutting edges of heels with labially directed and occasionally bifid lateral extremities. Slight ornament of short and parallel vertical ridges on the lateral extremity of the lingual face of the heels. Well-developed and elongate apron rectangular to weakly digitate and protruding labially; basal edge of the apron reaching or overtaking the baseline of the root. Broad lingual protuberance of the crown not reaching the baseline of the root. Basal root face rectangular, hemiaulacorhize to partially holaulacorhize (nutritive groove open on the lingual half of the basal face) in posteriors. Numerous marginolingual foramina.

Remarks
valid after Guinot et al. (2013) p. 619 [24889];


References
SOKOLSKYI, T. & GUINOT, G. (2021)
Elasmobranch (Chondrichthyes) assemblages from the Albian (Lower Cretaceous) of Ukraine. Cretaceous Research, 117: 104603
DOI: 10.1016/j.cretres.2020.104603
GUINOT, G. & UNDERWOOD, C.J. & CAPPETTA, H. & WARD, D.J. (2013)
Sharks (Elasmobranchii: Euselachii) from the Late Cretaceous of France and the UK. Journal of Systematic Palaeontology, 11 (6): 589–671
DOI: 10.1080/14772019.2013.767286
GUINOT, G. (2013)
Late Cretaceous elasmobranch palaeoecology in NW Europe. Palaeogeography, Palaeoclimatology, Palaeoecology, 388: 23–41
DOI: 10.1016/j.palaeo.2013.07.027
GUINOT, G. (2013)
Regional to global patterns in Late Cretaceous selachian (Chondrichthyes, Euselachii) diversity. Journal of Vertebrate Paleontology, 33 (3): 521–531
DOI: 10.1080/02724634.2013.740116
GUINOT, G. (2013)
Late Cretaceous elasmobranch palaeoecology in NW Europe. Palaeogeography, Palaeoclimatology, Palaeoecology, 388: 23–41
DOI: 10.1016/j.palaeo.2013.07.027
GUINOT, G. (2013)
Regional to global patterns in Late Cretaceous selachian (Chondrichthyes, Euselachii) diversity. Journal of Vertebrate Paleontology, 33 (3): 521–531
DOI: 10.1080/02724634.2013.740116