Revisions of conodont biostratigraphy across the Silurian-Devonian boundary

 

Authors: Carls P, Slavík L, Valenzuela-Ríos JI

Published in: Bulletin of Geosciences, volume 82, issue 2; pages: 145 - 164; Received 10 January 2007; Accepted in revised form 9 May 2007;

Keywords: Silurian/Devonian boundary, Conodont zonation, Conodont biostratigraphy, Barrandian, Frankenwald, Eastern Baltic,

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Abstract

The current conodont biozonation near the Silurian/Devonian boundary includes problematic biozones and is revised. Global applications of the zonal concepts concerning the current standard conodont zones eosteinhornensis, remscheidensis, detorta, and woschmidti are revised. New correlations are based on conodont faunas from the Požáry section (the stratotype of the Přídolí Series, Barrandian) and the Elbersreuth Orthoceratid Limestone (Frankenwald); they enable correlations with Baltic conodont faunas. The new data show that the eosteinhornensis Zone s.s. begins amid the Přídolí. The Delotaxis “detorta” plexus is not limited to the final Přídolí because it enters before the eosteinhornensis Zone. Accordingly, the use of a detorta Zone for global correlation is not recommended. The type stratum of the very particular Icriodus woschmidti is much younger than the entry of Icriodus postwoschmidti in Podolia. A succession of a woschmidti Zone and a postwoschmidti Zone in the early Lochkovian is problematic. Three new spathognathodontid species with stratigraphic potential: Zieglerodina? ivochlupaci sp. nov., Zieglerodina? klonkensis sp. nov. and Zieglerodina? zellmeri sp. nov. are described.

References

Alberti, G. 1962. Unterdevonische Trilobiten aus dem Frankenwald und Rheinischen Schiefergebirge (Ebbe- und Remscheider Sattel). Geologisches Jahrbuch 81, 135–156.

Aldridge, R.J. & Schönlaub, H.P. 1989. Conodonts. In Holland, C.H. & Bassett, M.G. (eds) A Global Standard for the Silurian System. National Museum of Wales, Geological Series 9, 274–279.

Aldridge, R.J., Dorning, K.J., Hill, P.J., Richardson, J.B. & Siveter, D.J. 1979. Microfossil distribution in the Silurian of Britain and Ireland. In Harris, A.L., Holland, C.H. & Leake, B.E. (eds) The Caledonides of the British Isles, Geological Society of London, Special Publication 8, 433–438.View article

Barnett, S.G. 1971. Biometric determination of the evolution of Spathognathodus remscheidensis: A method for precise intrabasinal time correlations in the northern Appalachians. Journal of Paleontology 45, 274–300.

Barnett, S.G. 1972. The evolution of Spathognathodus remscheidensis in New York, New Jersey, Nevada, and Czechoslovakia. Journal of Paleontology 46, 900–917.

Barrick, J.E. & Klapper, G. 1992. Late Silurian-Early Devonian Conodonts from the Hunton Group (Upper Henryhouse, Haragan, and Bois d’Arc Formations), South-Central Oklahoma. Oklahoma Geological Survey Bulletin 145, 19–65.

Bischoff, G.C.O. & Sannemann, D. 1958. Unterdevonische Conodonten aus dem Frankenwald. Notizblatt des Hessischen Landesamtes für Bodenforschung 86, 87–110.

Boersma, K.T. 1973. Description of certain Lower Devonian platform conodonts of the Spanish central Pyrenees. Leidse Geologische Mededeelingen 49, 285–301.

Branson, E.B. & Mehl, M.G. 1933. Conodonts from the Bainbridge (Silurian) of Missouri. University of Missouri Studies 8, 39–53.

Bultynck, P. 1971. Le Silurien Supérieur et le Dévonien Inférieur de la Sierra de Guadarrama (Espagne Centrale); Deuxieme partie: Assemblages de Conodontes a Spathognathodus (1). Bulletin de l’Institut Royal des Sciences Naturelles de Belgique 47, 1–43.

Bultynck, P. & Pelhate, A. 1971. Découverte de la Zone a eosteinhornensis (Conodontes) dans le Synclinorium Médian du Massif Armoricain. Mémoire du B.R.G.M. 73: Colloque ordovicien-silurien, 189–197.

Carls, P. 1975. Zusätzliche Conodonten-Funde aus dem tieferen Unterdevon Keltiberiens (Spanien). Senckenbergiana Lethaea 56, 399–428.

Carls, P. 1987. Ein Vorschlag zur biostratigraphischen Redefinition der Grenze Gedinnium/Siegenium und benachbarter Unter-Stufen. Courier Forschungs-Institut Senckenberg 92, 77–121.

Carls, P. & Gandl, J. 1969. Stratigraphie und Conodonten des Unter-Devons der östlichen Iberischen Ketten (NE Spanien). Neues Jahrbuch für Geologie und Paläontologie Abhandlungen 132, 155–218.

Carls, P., Slavík, L. & Valenzuela-Ríos, J.I. 2005. A new Ludlow (Late Silurian) Spathognathodontidae (Conodonta) from Bohemia with incipient alternating denticulation. Neues Jahrbuch für Geologie und Paläontologie Monatshefte 9, 547–565.

Cooper, B.J. 1980. Towards an improved Silurian conodont biostratigraphy. Lethaia 13, 209–227.View article

Gandl, J. 1972. Die Acastavinae und Asteropyginae (Trilobita) Keltiberiens (NE-Spanien). Abhandlungen der Senckenbergischen Naturforschenden Gesellschaft 530, 1–184.

Jeppsson, L. 1972. Some Silurian conodont apparatuses and possible conodont dimorphism. Geologica et Palaeontologica 6, 51–68.

Jeppsson, L. 1974. Aspects of Late Silurian conodonts. Fossils and Strata 6, 1–54.

Jeppsson, L. 1988. Conodont biostratigraphy of the Silurian-Devonian boundary stratotype at Klonk, Czechoslovakia. Geologica et Palaeontologica 22, 21–31.

Jeppsson, L. 1989. Latest Silurian conodonts from Klonk, Czechoslovakia. Geologica et Palaeontologica 23, 21–37.

Jeppsson, L. & Merrill, G.K. 1982. How best to designate obsolete taxonomic names and concepts: examples among conodonts. Journal of Paleontology 56, 1489–1493.

Jeppsson, L., Viira, V. & Männik, P. 1994. Silurian conodont-based correlations between Gotland (Sweden) and Saaremaa (Estonia). Geological Magazine 131, 201–218.View article

Klapper, G. & Murphy, M.A. 1974. Silurian-Lower Devonian conodont sequences in the Roberts Mountains Formation of central Nevada. University of California Publications in Geological Sciences 111, 1–62.

Kleffner, M.A. 1989. A conodont based chronostratigraphy. Bulletin of the Geological Society of America 101, 904–912.View article

Kříž, J., Jaeger, H., Paris, F. & Schönlaub, H.P. 1986. Přídolí – the fourth subdivision of the Silurian. Jahrbuch der Geologischen Bundesanstalt 129, 291–360.

Mashkova, T.V. 1968. Conodonts of the genus Icriodus Branson et Mehl (1938) from Borshchov and Skala horizons of Podolia. Doklady Akademii nauk, Earth Sciences 182, 220–233.

Mehrtens, C.J. & Barnett, S.G. 1976. Conodont subspecies from the Upper Silurian-Lower Devonian of Czechoslovakia. Micropaleontology 22, 491–500.View article

Murphy, M.A. & Valenzuela-Ríos, J.I. 1999. Lanea new genus, lineage of Early Devonian conodonts. Bolletino della Societa Paleontologica Italiana 37, 321–334.

Murphy, M.A., Valenzuela-Ríos, J.I. & Carls, P. 2004. On Classification of Pridoli (Silurian)-Lochkovian (Devonian) Spathognathodontidae (Conodonts). University of California, Riverside Campus Museum Contribution 6, 1–25.

Nikiforova, O. 1977. Podolia. In Martinsson, A. (ed.) The Silurian-Devonian Boundary, I.U.G.S. Series A 5, 52–64.

Rexroad, C.B. & Craig, W.W. 1971. Restudy of conodonts from the Bainbridge Formation (Silurian) at Lithium, Missouri. Journal of Paleontology 45, 684–703.

Rhodes, F.H.T. 1953. Some British Lower Palaeozoic conodont faunas. Philosophical Transactions of the Royal Society of London, Series B: Biological Sciences 237, 261–328.View article

Richter, R. & Richter, E. 1954. Die Trilobiten des Ebbe-Sattels und zu vergleichende Arten (Ordovizium, Gotlandium/Devon). Abhandlungen der Senckenbergischen Naturforschenden Gesellschaft 488, 1–62.

Uyeno, T.T. 1981. Stratigraphy and conodonts of the Upper Silurian and Lower Devonian rocks in the environs of the Boothia Uplift, Canadian Arctic Archipelago. Part II, Systematic study of conodonts. Geological Survey of Canada Bulletin 292, 39–75.

Viira, V. 1983. Paleontologya drevnego paleozoya pri Baltiky i Podolii. Akademiia nauk Estonskoy SSR, Institut geologii, 41–71.

Viira, V. 1999. Late Silurian conodont biostratigraphy in the northern East Baltic. Bolletino della Societa Paleontologica Italiana 37, 299–310.

Viira, V. 2000. Latest Silurian (Ohesaare Stage) conodonts and the detorta Zone in the Northeastern Baltic. Proceedings of the Estonian Academy of Sciences, Geology 49, 44–62.

Viira, V. & Aldridge, R.J. 1998. Upper Wenlock to Lower Pridoli (Silurian) conodont biostratigraphy of Saaremaa, Estonia, and a correlation with Britain. Journal of Micropalaeontology 17, 33–50.View article

Walliser, O.H. 1957. Conodonten aus dem oberen Gotlandium Deutschlands und der Karnischen Alpen. Notizblatt des hessischen Landesamtes für Bodenforschung Heft 85, 28–52.

Walliser, O.H., Whittington, H.B. & Yochelson, E. (eds) A late Silurian fauna from the Sutherland River Formation, Devon Island, Canadian Arctic Archipelago. Geological Survey of Canada Bulletin 65, 21–39.

Walliser, O.H. 1964. Conodonten des Silurs. Abhandlungen des Hessischen Landesamtes für Bodenforschung, Heft 41, 1–106.

Walliser, O.H. 1972. Conodont Apparatuses in the Silurian. Geologica et Palaeontologica SB1, 75–80.

Wolska, Z. 1969. Konodonty z wiercenia Chełm (Conodonts from a boring in Chełm, Poland). Acta Palaeontologica Polonica 14, 577–594.

Ziegler, W. 1956. Unterdevonische Conodonten, insbesondere aus dem Schönauer und dem Zorgensis-Kalk. Notizblatt des Hessischen Landesamtes für Bodenforschung, Heft 84, 93–106.

Ziegler, W. 1960. Conodonten aus dem Rheinischen Unterdevon (Gedinnium) des Remscheider Sattels (Rheinisches Schiefergebirge). Paläontologische Zeitschrift 34, 169–201.View article

Ziegler, W. 1971. Conodont Stratigraphy of the European Devonian. Geological Society of America Memoir 127, 227–284.