Helodus laevissimus

(Agassiz, 1837)


Classification: Holocephali Helodontiformes Helodontidae

Reference of the original description
Agassiz, L. (1837)
Recherches sur les poissons fossiles, 8th and 9th livraisons (September 1837). Petitpierre et Prince (text) and H. Nicolet (plates), Neuchâtel, vol. 3: [i]-viii, 1-[72], pl. B, C, 10a, 10b, 13, 14, 16, 21, 25a, 40a.

Types
Helodus laevissimus



Description:


Citation: Helodus laevissimus (Agassiz, 1837): In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 12/2024

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Remarks
shark-references Species-ID=8777;
synonym of Psephodus laevissimus after Woodward (1889) p.181 [2593]

Links: Original description of Agassiz Recherches sur les Poissons Fossiles (1833-1843)

References
Schnetz, L. & Dunne, E.M. & Feichtinger, I. & Butler, R.J. & Coates, M.I. & Sansom, I.J. (2024)
Rise and diversification of chondrichthyans in the Paleozoic. Paleobiology, in press
DOI: 10.1017/pab.2024.1
M'Coy, F. (1855)
A synopsis of the classification of the British Palæozoic rocks, with a systematic description of the British Palæozoic fossils in the Geological museum of the University of Cambridge. In Sedgwick, A.(ed), A synopsis of the classification of the British Palæozoic rocks, London :J.W. Parker and Son; [etc.] 1855.
Giebel, C.G. (1848)
Die Fische der Vorwelt, mit steter Berücksichtigung der lebenden Fische. Erster Band: Wirbelthiere. Dritte Abtheilung: Fische: i–xii, 1–467. Leipzig (Brockhaus).
Pictet, F.-J. (1845)
Traité élémentaire de paléontologie; ou, Histoire naturelle des animaux fossiles, considérés dans leurs rapports zoologiques et géologiques. Paris, Langlois et Leclerq, 1844-46, vol. II, pp. 259-310
de Koninck, L.G. (1844)
Description des animaux fossiles qui se trouvent dans le terrain Carbonifère de Belgique. IV + 716 pp.(Dessain), Liège.
Agassiz, L. (1838)
Recherches sur les poissons fossiles, 11th livraison (November 1838). Petitpierre et Prince (text) and H. Nicolet (plates), Neuchâtel, vol. 3: [73]-140, pl. 1a, 8a, 8b, 15, 17, 19, 20, 24, 25b, 30, 31, 32, 33, 34, 35, 39, 40.
Agassiz, L. (1837)
Recherches sur les poissons fossiles, 8th and 9th livraisons (September 1837). Petitpierre et Prince (text) and H. Nicolet (plates), Neuchâtel, vol. 3: [i]-viii, 1-[72], pl. B, C, 10a, 10b, 13, 14, 16, 21, 25a, 40a.