Heterodontus laevis

GUINOT, UNDERWOOD, CAPPETTA & WARD, 2013


Classification: Elasmobranchii Heterodontiformes Heterodontidae

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
Heterodontus cf. laevis

Types
Heterodontus laevis
Holotype: NHMUK: P. 49771;


Description:


Citation: Heterodontus laevis GUINOT, UNDERWOOD, CAPPETTA & WARD, 2013: In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 03/2021

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Description
Original diagnose after Guinot et al. (2013) p. 605 [24889]: Anterior teeth erect and cuspidate; main cusp triangular with a pair of lateral cusplets; broad mediolingual protuberance, well-developed outer cutting edges of cusplets linked together by a horizontal ridge; apron with concave edge, irregular ridges and pitted ornament. Root Y-shaped with well-developed lingual protuberance; mediolingual, central, mediolabial and marginolingual foramina present. Anterolateral teeth with low and broad main cusp devoid of lateral cusplets and more mesiodistally expanded root, weak labial ornament and developed marginolingual faces. Lateral teeth low, labiolingually compressed and mesiodistally elongate with smooth enameloid and sub-rectilinear lingual and labial edges in profile view; well-developed occlusal crest displaced lingually; marginal angles triangular or bevelled with labial or lingual distal notch; concave lingual crown face in profile view. Root with flat basal face; several lingual, labial and smaller basal foramina; mediolingual foramen linked to the wide labial foramina by an oblique duct.

Remarks
valid after Guinot et al. (2013) p. 605 [24889];


References
HOVESTADT, D.C. (2018)
Reassessment and revision of the fossil Heterodontidae (Chondrichthyes: Neoselachii) based on tooth morphology of extant taxa. Palaeontos, 30: 73 textpages, 8 textfigures, 3 tables, 44 plates
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