Pachygaleus lefevrei ( Daimeries, 1891 )
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publication ID |
https://doi.org/10.4202/app.2008.0306 |
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persistent identifier |
https://treatment.plazi.org/id/03DBAF0C-FFBA-EE48-FF4B-FA8BD1C5FC9C |
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treatment provided by |
Felipe (2024-08-08 19:16:40, last updated 2024-08-08 21:02:38) |
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scientific name |
Pachygaleus lefevrei ( Daimeries, 1891 ) |
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Pachygaleus lefevrei ( Daimeries, 1891)
Fig. 7A–C View Fig .
1891 Galaeus lefevrei sp. nov.; Daimeries 1891: 74 (no figure).
1905 Galeus lefevrei ( Daimeries, 1891) ; Leriche 1905: pl. 11: 54–58.
1946 Eugaleus lefevrei ( Daimeries, 1891) ; Casier 1946: pl. 1: 13.
1992 Pachygaleus lefevrei ( Daimeries, 1891) ; Cappetta 1992: 644–645.
1994 Galeorhinus lefevrei ( Daimeries, 1891) ; Kemp 1994: pl. 16: 7, 8.
1994 Galeorhinus lefevrei ( Daimeries, 1891) ; Case 1994: pl. 8: 165, 166.
1995 Pachygaleus lefevrei ( Daimeries, 1891) ; Bault and Genault 1995: pl. 7: 5, 6, pl. 8: 1, 2.
1999 Galeorhinus lefevrei ( Daimeries, 1891) ; Müller 1999: pl. 5: 2.
1999 Pachygaleus lefevrei ( Daimeries, 1891) ; Kent 1999a: pl. 2.2: P.
Material.—65 teeth.
Description.—This species has been frequently described and illustrated, so detailed treatment here is unnecessary. The teeth are medium sized (up to 10 mm width) with an oblique, compressed crown having generally smooth enameloid. The mesial cutting edge is slightly convex and usually lacks cusplets or serrations, though serrations may occur on some teeth ( Fig. 7B View Fig ). The distal heel, very long and oblique, bears numerous well−developed cusplets that become smaller distally. The root is wide, moderately robust, expanding basally in two lobes with rounded extremities. It is overhung by the labial bulge of the crown which may sometimes present irregular wrinkles.
Comments.—The type species was originally described from material of the Saint−Gilles locality ( Belgium, Ypresian) by Daimeries (1891), who attributed it to the invalid genus Galaeus (typological mistake). Cappetta (1992) amended the diagnosis of this species with the description of the new genus Pachygaleus , characterized by the large size and the very peculiar thickness of their teeth. Pachygaleus lefevrei is known from Thanetian to Lutetian deposits of the of the U.S. Atlantic Coast to west European basins including south England, Belgium, northern and southwestern France ( Casier 1946, 1966; Dutheil 1991; Cappetta 1992; Kemp 1994; Bault and Genault 1995; Kent 1999a; Müller 1999; Adnet 2006). As Cappetta (1992) noted, the distribution of this triakid shark seems to have been restricted to the North Atlantic coasts during the Paleogene.
Adnet, S. 2006. Nouvelles faunes de Selaciens (Elasmobranchii, Neoselachii) de l'Eocene moyen des Landes (Sud-Ouest, France). Implication dans la connaissance des communautes de selaciens d'eaux profondes. Palaeo Ichthyologica 10: 5 - 128.
Bault, J. - P. and Genault, B. 1995. Contribution a l'etude des elasmobranches du Thanetien (Paleocene) du Bassin de Paris. 1. Decouverte d'une faune d'elasmobranches dans la partie superieure des Sables de Bracheux (Thanetien, Paleocene) des regions de Compiegne (Oise) et de Montdidier (Somme). In: J. Herman and H. Van Waes (eds.), Selaciens et Stratigraphie. Belgian Geological Survey, Professional Papers 278: 185 - 259.
Cappetta, H. 1992. Carcharhiniformes nouveaux (Chondrichthyes, Neoselachii) de l'Ypresien du Bassin de Paris. Geobios 25: 639 - 646.
Case, G. R. 1994. Fossil fish remains from the late Paleocene Tuscahoma and early Eocene Bashi formations of Meridian, Lauderdale County, Mississippi. Part I. Selachians. Palaeontographica A 230: 97 - 138.
Casier, E. 1946. La faune ichthyologique de l'Ypresien de la Belgique. Memoire du Musee royale d' Histoire naturelle de Belgique 104: 1 - 267.
Casier, E. 1966. Faune ichthyologique du London Clay. 496 pp. British Museum (Natural History), London.
Daimeries, A. 1891. Notes ichthyologiques - VI. Annales de la Societe royale malacologique de Belgique, Bulletin des Seances 26: 73 - 77.
Dutheil, D. B. 1991. A checklist of Neoselachii (Pisces, Chondrichtyes) from Paleogene of Paris Basin, France. Tertiary Research 13: 27 - 36.
Kemp, D. 1994. Fossil Chondrichthyes from the Lower Barton and Bracklesham Groups of the Hampshire Basin: Their Taxonomy, Stratigraphic Distribution and Palaeobiology. 262 pp. Unpublished Ph. D. thesis. University of Portsmouth, Portsmouth.
Kent, B. W. 1999 a. Sharks from the Fisher / Sullivan Site. In: R. E. Weems and G. J. Grimsley (eds.), Early Eocene Vertebrates and Plants from the Fisher / Sullivan Site (Nanjemoy Formation), Stafford County, Virginia. Virginia Division of Mineral Resources Publication 152: 11 - 37.
Leriche, M. 1905. Les poissons tertiaires de la Belgique. II. Les poissons eocenes. Memoires du Musee royale d'Histoire Naturelle de Belgique 3: 49 - 228.
Muller, A. 1999. Ichthyofaunen aus dem atlantischen Tertiar des USA. Leipziger Geowissenschafteb 9 - 10: 1 - 360.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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Pachygaleus lefevrei ( Daimeries, 1891 )
| Adnet, Sylvain & Cappetta, Henri 2008 |
Pachygaleus lefevrei ( Daimeries, 1891 )
| Cappetta, H. 1992: 644 |
Galaeus lefevrei
| Daimeries, A. 1891: 74 |