Helodus laevissimus
(Agassiz, 1837)
Classification: Holocephali Helodontiformes Helodontidae
Reference of the original description
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.
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
Helodus laevissimus
Description:
Citation: Helodus laevissimus (Agassiz, 1837): In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 01/2025
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)
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
Rise and diversification of chondrichthyans in the Paleozoic. Paleobiology, in press
DOI: 10.1017/pab.2024.1
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.
Die Fische der Vorwelt, mit steter Berücksichtigung der lebenden Fische. Erster Band: Wirbelthiere. Dritte Abtheilung: Fische: i–xii, 1–467. Leipzig (Brockhaus).
A stratigraphical list of British fossils; arranged under the principal division of the British strata, with a few elementary remarks on their character and localities. London, Reeve Brothers, Strand, 132pp
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
Description des animaux fossiles qui se trouvent dans le terrain Carbonifère de Belgique. IV + 716 pp.(Dessain), Liège.
Report on the Geology of the County of Londonderry, and of Parts of Tyrone and Fermanagh. Memoirs of the Geological Survey of the United Kingdom, district mem. Geol. Surv. Ireland, Dublin, xxxi + 784 pp., A. Milliken, 1843, 784pp
Synoptical Table of British Fossil Fishes, Arranged in the Order of the Geological Formations. Report of the British Association for the Advancement of Science, 13th Meeting (1843), 194–207
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.
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.
Rise and diversification of chondrichthyans in the Paleozoic. Paleobiology, in press
DOI: 10.1017/pab.2024.1
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.
Die Fische der Vorwelt, mit steter Berücksichtigung der lebenden Fische. Erster Band: Wirbelthiere. Dritte Abtheilung: Fische: i–xii, 1–467. Leipzig (Brockhaus).
A stratigraphical list of British fossils; arranged under the principal division of the British strata, with a few elementary remarks on their character and localities. London, Reeve Brothers, Strand, 132pp
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
Description des animaux fossiles qui se trouvent dans le terrain Carbonifère de Belgique. IV + 716 pp.(Dessain), Liège.
Report on the Geology of the County of Londonderry, and of Parts of Tyrone and Fermanagh. Memoirs of the Geological Survey of the United Kingdom, district mem. Geol. Surv. Ireland, Dublin, xxxi + 784 pp., A. Milliken, 1843, 784pp
Synoptical Table of British Fossil Fishes, Arranged in the Order of the Geological Formations. Report of the British Association for the Advancement of Science, 13th Meeting (1843), 194–207
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.
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.
