To say the least, ideas move slowly in the paleontological published record.

  • Glikman (1980) erected a new genus of Cretaceous sandtiger sharks for material from the Russian platform -- Eostriatolamia (Type = Lamna venusta LERICHE, 1929, from the Campanian of France). Cappetta (1987: 90) synonymized this genus with Synodontaspis WHITE, 1931, which would soon be overruled by the ICZN (1987) in favor of Carcharias RAFINESQUE, 1810.
  • Glikman and Averianov (1998) would argue that positional tooth counts could not support an assignment to the extant genus (Carcharias) and used Eostriatolamia for their studied material; they went on to comment that some North American taxa might belong to that genus as well — Carcharias amonensis? (CAPPETTA & CASE, 1975b), Carcharias samhammeri? (CAPPETTA & CASE, 1975a) and Carcharias holmdelensis (CAPPETTA & CASE, 1975a). As positional tooth counts were the basis for their original determination, their speculation in this matter can only be viewed as provisional.
    In any event, their conclusions appear to have been initially overlooked.
  • Cappetta 2006 included the genus but limited it to E. venusta and material from Russia; no North American material was included.
  • Kriwet et al (2008) included the genus in the Early Cretaceous of Spain.
  • Underwood & Cumbaa (2010) when reporting on the Cenomanian of Saskatchewan, erected Eostriatolamia paucicorrugata; in addition, they noted the similarity between E. striatula (DALINKEVICIUS, 1935} and Cenocarcharias CAPPETTA & CASE, 1999. They concluded Cenocarcharias to be junior to Eostriatolamia and that E. striatula and E. tenuiplicatus may possibly represent a single species.

    Glikman and Averianov (1998) included six or seven species in Eostriatolamia, based on the study of 973 teeth from Russian platform. They did not include NA taxa in their analysis but relied on general tooth-design. Elasmo.com will continue to view Carcharias samhammeri and Cenocarcharias tenuiplicatus as such; but include in NA:

  • ? E. amonensis Albian-Cenomanian of Texas and WIS;
  • ? E. holmdelensis Campanian-Maastrichtian of East & Gulf Coasts and WIS;
  • E. paucicorrugata Cenomanian of Canada.
  • Eostriatolamia sp. Santonian of New Mexico

    Cretaceous North America

    Some of the literature relevant to NA includes:

  • Cappetta & Case (1975a) erected Odontaspis holmdelensis and O. samhammeri from the late Upper Cretaceous of the East Coast.
  • Cappetta & Case (1975b) erected Odontaspis amonensis and O. tenuiplicatus from the late Lower to early Upper Cretaceous of Texas
  • Case (1987) erected Odontaspis cheathami for a sandtiger tooth-design from the Late Campanian of Wyoming. Case & Cappetta (1997: 141) moved this design to Carcharias and noted, "So, C. cheathami and C. holmdelensis appear to be very close, if not identical species".
  • Welton & Farish (1993: 89-90) included C. amonensis as Late Albian - Cenomanian of Texas.
  • Kent (1994: 39-43) noted C. holmdelensis as present in the Campanian - Maastrichtian of New Jersey & Delaware and Georgia.
  • Case & Cappetta (1997: 140-41) reported C. holmdelensis from the Maastrichtian of Texas.
  • Glikman and Averianov (1998) include Eostriatolamia holmdelensis, ?E. amonensis and ?E. samhammeri.
  • Becker et al (2006: 705) reported C. cf holmdelensis from the Arkadelphia Fm. (Maastrichtian, Arkansas).
  • Underwood & Cumbaa (2010) include E. tenuiplicatus and erect E. paucicorrugata from the Cenomanian of Saskatchewan.
  • Bourdon et al (2011) report Eostriatolamia sp from the Santonian of New Mexico.

    Selected References

    Becker, M, Chamberlain, J and Wolf, G., 2006. Chondrichthyans from the Arkadelphia Formation (Upper Cretaceous: Upper Maastrichtian) of Hot Spring County, Arkansas. Journal of Paleontology; 80:4; pp 700-716.
    Bourdon, J., Wright, K., Lucas, S.G., Spielmann, J.A. and Pence, R., 2011. Selachians from the Upper Cretaceous (Santonian) Hosta Tongue of the Point Lookout Sandstone, central New Mexico. New Mex. Mus. Nat. His. and Sc., Bulletin 52; 54pp.
    Cappetta, H., 1987. Chondrichthyes II. Mesozoic and Cenozoic Elasmobranchii: Handbook of Paleoichthyologie, v. 3b, 193 pp.
    Cappetta, H., 2006. Elasmobranchii post-Triadici (index generum et specierum). In: Riegraf, W. (Ed) Fossilium Catalogus I:Animalia 142. Leiden, Backhuys Publish, 472pp.
    Cappetta, H. & Case, G., 1975a. Contribution a l'étude des sélaciens du groupe Monmouth (Campanien-Maestrictian) du New Jersey. Palaeontographica Abteilung A, 151: 1-46.
    Cappetta, H. & Case, G., 1975b. Sélaciens nouveaux du Crétacé du Texas. Géobios, 8 (4): 303-307, 6 fig.
    Cappetta, H. and Case, G.R., 1999. Additions aux faunes de sélaciens du Crétacé du Texas (Albien superieur - Campanian): Palaeo Ichthyologica, v. 9, p. 5-111.
    Case, G.. 1987. A new selachian fauna from the Late Campanian of Wyoming (Teapot Sandstone Member, Measaverde Formation, Big Horn Basin). Palaeontographica, Abt. A, 197 (1-3): 1-37.
    Case, G. and Cappetta, H.. 1997. A new selachian fauna from the late Maastrichtian of Texas. Münchener Geowissenschaften Abhandungen 34:131-189.
    Dalinkevicius, J.A., 1935. On the fossil fishes of the Lithuanian Chalk. I. Selachii: Mémoires de la Faculté Des Sciences de l'Université de Vytautas le Grand, v. 9, p. 247-305.
    Glikman, L.S., 1980. Evolution of Cretaceous and Cenozoic lamnoid sharks [in Russian]: Doklady Akademii Nauk Soyuza Sovetskikh otsialisticheskikh Respublik, Moscow, 247 pp.
    Glikman, L.S. and Averianov, A.O., 1998. Evolution of the Cretaceous lamnoid sharks of the genus Eostriatolamia: Paleontological Journal, v. 32, p. 376-384.
    Kent, B., 1994. Fossil Sharks of the Chesapeake Region. Egan Rees & Boyer, Maryland. 146 pp.<
    Kriwet, J., Klug, S., Canudo, J. and Cuenca-Bescos, G., 2008. A new Early Cretaceous lamniform shark (Chondrichthyes, Neoselachii): Zoological Journal of the Linnean Society, v. 154, p. 278-290.
    Leriche, M., 1929. Les poissons du Crétacé marin de la Belgique et du Limbourg hollandais (note préliminaire). Les resultats stratigraphiques de leur etude: Bulletin de la Société Belge de Géologie, de Paléontologie et d'Hydrologie, v. 37, p. 199- 299.
    Rafinesque, C.S., 1810. Caratteri di alcuni nuovi generi e nouvi spedie di animali e piante della Sicilia, con varie osservazione sopra i medesimi: Palermo, 105 p.
    Underwood, C.J. and Cumbaa, S.L., 2010. Chondrichthyans from a Cenomanian (Late Cretaceous) bonebed, Saskatchewan, Canada: Palaeontology, v. 53, p. 903-944.
    Welton, B. and Farish, R., 1993. The Collector's Guide to Fossil Sharks and Rays from the Cretaceous of Texas. Before Time, Texas. 204 pp.
    White, E.I., 1931. The vertebrate fauna of the English Eocene: Volume I, from the Thanet Sands to the Basement Bed of the London Clay: London, British Museum (Natural History), London, 23 p.

     

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