Upper Cenomanian–Lower Turonian ammonoids from the Saxonian Cretaceous (lower Elbtal Group, Saxony, Germany)


Authors: Wilmsen M, Nagm E

Published in: Bulletin of Geosciences, volume 88, issue 3; pages: 647 - 674; Received 26 September 2012; Accepted in revised form 25 January 2013; Online 3 July 2013

Keywords: Upper Cretaceous, Saxo-Bohemian Cretaceous Basin, ammonites, taxonomic revision, biostratigraphy,

full text (PDF, 6.68 MB)

Export to RIS



The Upper Cenomanian to Lower Turonian ammonoid fauna of the Saxonian Cretaceous (Elbtal Group, Saxony, Germany) has been revised based on the study of 270 specimens hosted in the Museum für Mineralogie und Geologie (MMG) of the Senckenberg Naturhistorische Sammlungen Dresden. In total, 12 species have been identified and, based on this revision, a number of ammonoids are now reported and/or illustrated for the first time from the Elbtal Group of Saxony: Euomphaloceras septemseriatum, Neocardioceras juddii barroisi, Watinoceras coloradoense, Spathites (Jeanrogericeras) reveliereanus, Sciponoceras gracile and Scaphites equalis. The study demonstrated the presence of all Upper Cenomanian and Lower Turonian standard ammonite biozones in the lithostratigraphic succession of the lower Elbtal Group: the lower Upper Cenomanian Calycoceras naviculare Zone (represented by the Oberhäslich Formation), the mid- and upper Upper Cenomanian Metoicoceras geslinianum and Neocardioceras juddii zones (represented by the Dölzschen Formation), and the Lower Turonian Watinoceras coloradoense and Mammites nodosoides zones (represented by the Brießnitz Formation). The ammonoid fauna from the Saxonian Cretaceous is dominated by strongly ornamented and widely distributed Acanthoceratidae.


Barrois, C. & Guerne, J. de 1878. Description de quelques especes nouvelles de la craie de l’est du bassin de Paris. Annales de la Société Géologique du Nord 5, 42-64.

Barroso-Barcenilla, F. 2004. Acanthoceratidae and ammonite zonation of the upper Cenomanian and the lower Turonian in the Puentedey area, Basque-Cantabrian Basin, Spain. Coloquios de Paleontología 54, 83-114.

Barroso-Barcenilla, F. 2007. Revision and new data of the ammonite family Acanthoceratidae de Grossouvre, 1894, from the Lower Turonian of the Iberian Trough, Spain. Palaeontographica, Abteilung A 280, 123-163.

Bengtson, P. 1988. Open nomenclature. Palaeontology 31, 223-227.

Chancellor, G.R. 1982. Cenomanian-Turonian ammonites from Coahuila, Mexico. Bulletin of the Geological Institution of the University of Uppsala 9, 77-129.

Chancellor, G.R., Kennedy, W.J. & Hancock, J.M. 1994. Turonian ammonites faunas from central Tunisia. Special Papers in Palaeontology 50, 1-188.

Chrząstek, A. 2012. Palaeontology of the Middle Turonian limestones of the Nysa Kłodzka Graben (Sudetes, SW Poland): biostratigraphical and palaeogeographical implications. Geologos 18(2), 83-109.View article

Cobban, W.A. & Scott, G.R. 1972. Stratigraphy and ammonite fauna of the Graneros Shale and Greenhorn Limestone near Pueblo, Colorado. U.S. Geological Survey Professional Paper 645, 1-108.

Cobban, W.A. 1988. The Upper Cretaceous ammonite Watinoceras Warren in the Western Interior of the United States. U.S. Geological Survey Bulletin 1788, 1-15.

Cobban, W.A., Hook, S.C. & Kennedy, W.J. 1989. Upper Cretaceous rocks and ammonite faunas of southwestern New Mexico. New Mexico Bureau of Mines and Mineral Resources Memoir 45, 1-137.

Cooper, M.R. 1978. Uppermost Cenomanian-basal Turonian ammonites from Salinas, Angola. Annals of the South Africa Museum 75, 51-152.

Courtiller, M.A. 1860. Description de trois nouvelles especes d’ammonites du terrain crétacé. Mémoire de la Société impériale d’Agriculture, Science et des Arts d’Angers 3, 246-252.

Courtiller, M.A. 1867. Les Ammonites du Tuffeau. Annales de la Société Linnéenne du Département de Maine-et-Loire 9, 1-8.

Cragin, F.W. 1893. A contribution to the invertebrate paleontology of the Texas Cretaceous. Texas Geological Survey, 4th Annual Report (1892), 139-246.

DeKay, J.E. 1828. Report on several multilocular shells from the state of Delaware, with observations on a second specimen of the new fossil genus Eurypterus. Annals of the Lyceum of Natural History of New York 2, 273-279.

Dietze, H., 1960. Paläontologische und stratigraphische Untersuchungen der Klippenfazies von Oberau und Meißen (Sächsische Oberkreide). Jahrbuch des Staatlichen Museums für Mineralogie und Geologie Dresden 1960, 1-74.

Fritsch, A. 1872. Cephalopoden der böhmischen Kreideformation. 52 pp. Verlag des Verfassers, Prag.

Gale, A.S., Bengtson, P. & Kennedy, W.J. 2005. Ammonites at the Cenomanian-Turonian boundary in the Sergipe basin, Brazil. Bulletin of the Geological Society of Denmark 52, 167-191.

Geinitz, H.B. 1839-1843. Charakteristik der Schichten und Petrefakten des sächsisch-böhmischen Kreidegebirges sowie der Versteinerungen von Kieslingswalda. 116 pp. (Heft 1-3), 19 pp. (Heft 4). Arnold, Leipzig.

Geinitz, H.B. 1846. Grundriss der Versteinerungskunde. i-viii, 813 pp. Arnoldische Buchhandlung, Dresden & Leipzig.

Geinitz, H.B. 1849. Das Quadersandsteingebirge oder das Kreidegebirge in Deutschland. 293 pp. Craz & Gerlach, Freiberg.

Geinitz, H.B. 1871-1875. Das Elbthalgebirge in Sachsen. Teil I (Der untere Quader). Palaeontographica (Beiträge zur Naturgeschichte der Vorwelt) 20(1), 1-319.

Geinitz, H.B. 1872-1875. Das Elbthalgebirge in Sachsen. Teil II. Der mittlere und obere Quader. Palaeontographica 20(2), 1-245.

Gill, T. 1871. Arrangement of the Families of Mollusks. Smithsonian Miscellaneous Collections 227, i-xvi, 1-49.

Grossouvre, A. de 1894. Recherches sur la craie supérieure, 2, Paléontologic. Les ammonites de la craie supérieure. Mémoires du Service de la Carte géologique de France, 1-264.

Grossouvre, A. de 1912. Le Crétacé de la Loire-Inférieure et de la Vendée. Bulletin de la Société des sciences naturelles de l’Ouest de la France, Nantes (3)2, 1-38.

Hancock, J.M. 1991. Ammonite scales for the Cretaceous system. Cretaceous Research 12, 259-191.View article

Henderson, J. 1908. New species of Cretaceous invertebrates from northern Colorado. Proceedings of the U.S. National Museum of Natural History 34(1611), 259-264.

Houša, V. 1967. Lewesiceras Spath (Pachydiscidae, Ammonoidea) from the Turonian of Bohemia. Sborník geologických věd, Paleontologie 9, 1-50.

Howarth, M.K. 1985. Cenomanian and Turonian ammonites from the Novo Redondo area, Angola. Bulletin of the British Museum of Natural History (Geology) 39, 73-105.

Hyatt, A. 1894. Phylogeny of an acquired characteristic. Proceedings of the American Philosophical Society 32, 349-647.

Hyatt, A. 1900. Cephalopoda, 502-604. In Zittel, K.A. von (1896-1900) Textbook of Palaeontology (translation Eastman, C.R.). Macmillan, London & New York.

Hyatt, A. 1903. Pseudoceratites of the Cretaceous. United States Geological Survey Monograph 44, 1-351.

Ifrim, C. & Stinnesbeck, W. 2007. Early Turonian ammonites from Vallecillo, north-eastern Mexico: taxonomy, biostratigraphy and palaeobiogeographic significance. Cretaceous Research 28, 642-664.View article

Kaplan, U., Kennedy, W.J., Lehmann, J. & Marcinowski, R. 1998. Stratigraphie und Ammonitenfaunen des westfälischen Cenoman. Geologie und Paläontologie in Westfalen 51, 1-236.

Karrenberg, H. 1935. Ammonitenfauna der nordspanischen Oberkreide. Palaeontographica, Abteilung A 82, 125-161.

Kennedy, W.J. 1971. Cenomanian ammonites from southern England. Special Papers in Palaeontology 8, 1-133.

Kennedy, W.J. 1984. Ammonite faunas and the “standard zones” of the Cenomanian to Maastrichtian Stages in their type areas, with some proposals for the definition of the stage boundaries by ammonites. Bulletin of the Geological Society of Denmark 33, 147-161.

Kennedy, W.J. 1986. Ammonite biostratigraphy of the Albian to basal Santonian. Physics and Chemistry of the Earth 16, 129-182.

Kennedy, W.J. 1988. Late Cenomanian and Turonian ammonite faunas from north-east and central Texas. Special Papers in Palaeontology 39, 1-131.

Kennedy, W.J. & Juignet, P. 1981. Upper Cenomanian ammonites from the Environs of Saumur, and the provenance of the types of Ammonites vibrayeanus and Ammonites geslinianus. Cretaceous Research 2, 19-49.View article

Kennedy, W.J. & Juignet, P. 1984. A revision of the ammonite faunas of the type Cenomanian. 2. The Families Binneyitidae, Desmoceratidae, Engonoceratidae, Placenticeratidae, Hoplitidae, Schloenbachiidae, Lyelliceratidae and Forbesiceratidae. Cretaceous Research 5, 93-161.View article

Kennedy, W.J., Wright, C.W. & Hancock, J.M. 1980. Origin, evolution, and systematics of the Cretaceous ammonite Spathites. Palaeontology 23, 821-837.

Kennedy, W.J., Juignet, P. & Hancock, J.M. 1981. Upper Cenomanian ammonites from Anjou and the Vendée, western France. Palaeontology 24, 25-84.

Kennedy, W.J., Juignet, P. & Girard, J. 2003. Uppermost Cenomanian ammonites from Eure, Haute-Normandie, northwest France. Acta Geologica Polonica 53, 1-18.

Kley, J.&Voigt, T. 2008. Late Cretaceous intraplate thrusting in central Europe: Effect of Africa-Iberia-Europe convergence, not Alpine collision. Geology 36, 839-842.View article

Köhler, S. 2001. Turrilites-Nachweis aus dem Untercenoman von Meißen. Fossilien 3(1), 163-164.

Konečný, J. & Vašíček, Z. 1983. Lower Turonian ammonites from the Prokop opencast mine in Březina (E-Bohemia). Časopis pro mineralogii a geologii 28(2), 169-180.

Konečný, J. & Vašíček, Z. 1987. Die Cephalopoden der Cenoman/ Turon-Grenze des Steinbruchs Prokop, Březina bei Moravská Třebová. Acta Musei Moraviae, Scientiae naturales 72, 81-96.

Korn, D., Ebbighausen, V., Bockwinkel, J. & Klug, C. 2003. The A-mode sutural ontogeny in prolecanitid ammonites. Palaeontology 46, 1123-1132.View article

Kullman, J. & Wiedmann, J. 1970. Significance of sutures in phylogeny of Ammonoidea. Paleontological contributions, University of Kansas 44, 1-32.

Kummel, B. & Decker, J.M. 1954. Lower Turonian ammonites from Texas and Mexico. Journal od Paleontology 28, 310-319.

Laube, G.C. & Bruder, G. 1887. Ammoniten der böhmischen Kreide. Palaeontographica 33, 217-239.

Lehmann, J. & Herbig, H.-G. 2009. Late Cretaceous ammonites from the Bou Angueur syncline (Middle Atlas, Morocco) - stratigraphic and palaeobiogeographic implications. Palaeontographica A 289, 45-87.

Lehmann, J. 1998. Systematic palaeontology of the ammonites of the Cenomanian-Lower Turonian (Upper Cretaceous) of northern Westphalia, north Germany. Tübinger Geowissenschaftliche Arbeiten Reihe A 37, 1-57.

Mantell, G.A. 1822. The fossils of the South Downs, or Illustrations of the geology of Sussex. 328 pp. Lupton Relfe, London.

Meek, P.B. 1876. A report on the invertebrate Cretaceous and Tertiary fossils of the upper Missouri country, 1-629. In Hayden, F.V. Report of the United States Geological Survey of the Territories 9. U.S. Government Printing Office, Washington.

Meister, C. & Abdallah, H. 2005. Précision sur les successions d’ammonites du Cénomanian-Turonien dans la région de Gafsa, Tunisie du centre-sud. Revue de Paléobiologie 24, 111-199.

Mitchell, A.J., Uličný, D., Hampson, G.J., Allison, P.A., Gorman, G.J., Piggott, M.D., Wells, M.R. & Pain, C.C. 2010. Modelling tidal current-induced bed shear stress and palaeocirculation in an epicontinental seaway: the Bohemian Cretaceous Basin, Central Europe. Sedimentology 57, 359-388.View article

Nagm, E. & Wilmsen, M. 2012. Upper Cenomanian-Turonian (Cretaceous) ammonoids from Wadi Qena, central Eastern Desert, Egypt: taxonomy, biostratigraphy and palaeobiogeographic implications. Acta Geologica Polonica 62, 63-89.View article

Nagm, E., Wilmsen, M., Aly, M.F. & Hewaidy, A. 2010. Upper Cenomanian-Turonian (Upper Cretaceous) ammonoids from the western Wadi Araba, Eastern Desert, Egypt. Cretaceous Research 31, 473-499.View article

Niebuhr, B., Hiss, M., Kaplan, U., Tröger, K.-A., Voigt, S., Voigt, T., Wiese, F. & Wilmsen, M. 2007. Lithostratigraphie der norddeutschen Oberkreide. Schriftenreihe der Deutschen Gesellschaft für Geowissenschaften 55, 1-136.

Niebuhr, B., Wilmsen, M., Chellouche, P., Richardt, N. & Pürner, T. 2011. Stratigraphy and facies of the Turonian (Upper Cretaceous) Roding Formation at the southwestern margin of the Bohemian Massif (southern Germany, Bavaria). Zeitschrift der Deutschen Gesellschaft für Geowissenschaften 162(3), 295-316.View article

Ogg, J.G. & Hinnov, L.A. 2012. Cretaceous, 793-853. In Gradstein, F.M., Ogg, J.G., Schmitz, M. & Ogg, G.M. (eds) The geologic time scale 2012, Volume 2. Elsevier, Amsterdam.

Orbigny, A. d’ 1840-1842. Paléontologie Française. Terrain Crétacé I, Céphalopodes. 662 pp. (1-120: 1840; 121-430: 1841; 431-662: 1842). Masson, Paris.

Orbigny, A. d’ 1850. Prodrome de Paléontologie stratigraphique universelle des animaux Mollusques et rayonnés faisant suite au cours élémentaire de Paléontologie et de Géologie stratigraphiques 2. 427 pp. Masson, Paris.View article

Parkinson, J. 1811. The fossil Starfish, Echini, Shells, Insects, Amphibia, Mammalia and c. The Organic remains of a Former World 3, 1-479.

Petrascheck,W. 1902. Die Ammoniten der sächsischen Kreideformation. Beiträge zur Paläontologie und Geologie Österreich-Ungarns und des Orients 14, 131-162.

Philip, J. & Floquet, M. 2000. Late Cenomanian (94.7-93.5), 129-136. In Dercourt, J., Gaetani, M., Vrielynck, B., Barrier, E., Biju-Duval, B., Brunet, M.F., Cadet, J.P., Crasquin, S. & Sandulescu, M. (eds) Atlas Peri-Tethys palaeogeographical maps. CCGM/CGMW, Paris.

Richardt, N., Wilmsen, M. & Niebuhr, B. 2013. Late Cenomanian-Early Turonian facies development and sea-level changes in the Bodenwöhrer Senke (Danubian Cretaceous Group, Bavaria, Germany). Facies 59.View article

Schlüter, C. 1871-1872. Cephalopoden der oberen deutschen Kreide. Palaeontographica 21, 1-24 (1871, 1. Lieferung); 21, 25-120 (1872, 2.-5. Lieferung).

Sharpe, D. 1853-1857. Description of the fossil remains of Mollusca found in the Chalk of England. I, Cephalopoda. Monographs of the Palaeontological Society, London, 1-26, (1853); 27-36, (1855); 37-68, (1857).

Shimer, H.W. & Shrock, R.R. 1944. Index fossils of North America. 837 pp. Wiley, New York.

Shumard, B.F. 1860. Description of new Cretaceous fossils from Texas. Transactions of the Academy of Sciences of St. Louis 1, 590-610.

Skupin, K. (ed.), Dahm-Arens, H., Michel, G., Vieth-Redemann, A. & Weber, P. 1989. Geologische Karte von Nordrhein-Westfalen 1:25.000. Erläuterungen zu Blatt 4418 Wünnenberg. 151 pp. Geologisches Landesamt NRW, Krefeld.

Sowerby, J. 1812-1822. The mineral conchology of Great Britain; or coloured figures and descriptions of those remains of testaceous animals or shells, which have been preserved at various times and depths in the earth. Volumes 1-4. 383 pls. Meredith, London.

Spath, L.F. 1922. On the Senonian ammonite fauna of Pondoland. Transactions of the Royal Society of South Africa 10, 113-148.View article

Spath, L.F. 1923. A monograph of the Ammonoidea of the Gault, Part 1. Monographs of the Palaeontological Society, London 353, 1-72.

Spath, L.F. 1926. On new ammonites from the English Chalk. Geological Magazine 63, 77-83.View article

Spath, L.F. 1939. Problems of ammonite nomenclature. 6. The genus Pachydiscus Zittel. Geological Magazine 76, 293-296.View article

Stoliczka, F. 1863-1866. The fossil Cephalopoda of the Cretaceous rocks of southern India. Ammonitidae with revision of the Nautilidae etc. Memoirs of the Geological Survey of India 1, Palaeontologica Indica 3(1), 41-56 (1863); (2-5), 57-106 (1864); (6-9), 107-154 (1865); (10-13), 155-216 (1866).

Thomel, G. 1992. Ammonites du Cenomanien et du Turonien du sud-est de la France, Tome 2: Considérations sur les faunes d’Ammonites Cénomaniennes et Turoniennes des Chaines Subalpines méridionales (Alpes de Haute-Provence, Alpes-Maritimes, Var). 383 pp. Serre Éditeur, Nice.

Tröger, K.-A. 1956. Über die Kreideablagerungen des Plauenschen Grundes (sediment-petrographische und biostratonomisch-paläontologische Untersuchungen). Jahrbuch des Staatlichen Museums für Mineralogie und Geologie zu Dresden 2, 22-124.

Tröger, K.-A. 1967. Zur Paläontologie, Biostratigraphie und faziellen Ausbildung der unteren Oberkreide (Cenoman-Turon). Teil I - Paläontologie und Biostratigraphie der Inoceramen des Cenomans und Turons. Abhandlungen des Staatlichen Museums für Mineralogie und Geologie zu Dresden 12, 13-207.

Tröger, K.-A. 1968. Bemerkungen zu Hyphantoceras reussianum (d’Orbigny). Freiberger Forschungshefte C 234(3), 45-50.

Tröger, K.-A. 1969. Zur Paläontologie, Biostratigraphie und faziellen Ausbildung der unteren Oberkreide (Cenoman-Turon). Teil II - Stratigraphie und fazielle Ausbildung des Cenomans und Turons in Sachsen, dem nördlichen Harzvorland und dem Ohmgebirge. Abhandlungen des Staatlichen Museums für Mineralogie und Geologie zu Dresden 13, 1-70.

Tröger, K.-A. 1989. Problems of Upper Cretaceous inoceramid biostratigraphy and palaeobiogeography in Europe and western Asia, 911-930. In Wiedmann, J. (ed.) Cretaceous of the Western Tethys. Proceedings 3rd International Cretaceous Symposium, Tübingen 1987. Schweizerbart, Stuttgart.

Tröger, K.-A. 2003. The Cretaceous of the Elbe valley in Saxony - a review. Carnets de Géologie A03, 1-14.

Vašíček, Z. 1989. Cenomanian ammonites from the Bohemian Cretaceous Basin. Časopis Národního muzea v Praze, Řada přírodovědná 158, 67-77.

Voigt, S., Gale, A.S. & Voigt, T. 2006. Sea-level changes, carbon cycling and palaeo-climate during the Late Cenomanian of northwest Europe; an integrated palaeo-environmental analysis. Cretaceous Research 27, 836-858.View article

Voigt, T. 1994. Faziesentwicklung und Ablagerungssequenzen am Rand eines Epikontinentalmeeres - die Sedimentationsgeschichte der Sächsischen Kreide. 130 pp. Unpublished PhD thesis, TU Bergakademie Freiberg.

Voigt, T. 1998. Entwicklung und Architektur einer fluviatilen Talfüllung - die Niederschöna-Formation im Sächsischen Kreidebecken. Abhandlungen des Staatlichen Museums für Mineralogie und Geologie zu Dresden 43/44, 121-139.

Voigt, T. 1999. Ablagerungsbedingungen und Taphonomie der Schmilka-Formation (Unter-Turon) südlich von Pirna (Sächsisches Kreidebecken). Greifswalder Geowissenschaftliche Beiträge 6, 193-207.

Voigt, T., Voigt, S. & Tröger, K.-A. 1994. Faziesentwicklung einer ertrunkenen Felsküste - die obercenomane Monzonitklippe westlich von Dresden. Freiberger Forschungshefte C 452, 23-34.

Voigt, T.,Wiese, F., Eynatten, H. von, Franzke, H.-J.&Gaupp, R. 2006. Facies evolution of syntectonic Upper Cretaceous deposits in the Subhercynian Cretaceous Basin and adjoining areas (Germany). Zeitschrift der Deutschen Gesellschaft für Geowissenschaften 157(2), 203-243.View article

Wanderer, K. 1909. Die wichtigsten Tierversteinerungen aus der Kreide des Königreiches Sachsen. i-xxii, 81 pp. Verlag von Gustav Fischer, Jena.

Warren, P.S. 1930. Description of new species of fossils from part of Peace River and Grande Prairie districts, Alberta: New species of fossils from Smoky River and Dunvegan formations, Alberta. Research Council of Alberta Report 21, Appendix, 37-68.

Wedekind, R. 1916. Über Lobus, Suturallobus und Inzision. Zentralblatt für Mineralogie, Geologie und Paläeontologie for 1916, 185-195.

Wiedmann, J. 1960. Le Crétacé Supérrieur de l’Espange et du Portugal et ses Céphalopodes, 709-764. In Roger, J. (ed.) Colloque sur le Crétacé Supérrieur Français. Comptes Rendus du 84e. Congrés National des Sociétés Savantes, Dijon, France, 1959.

Wiedmann, J. 1964. Le Crétacé Supérrieur de l’Espange et du Portugal et ses Céphalopodes. Estudios Geologicos 20, 107-148.

Wiedmann, J. 1988. Plate tectonics, sea level changes, climate and the relationship to ammonite evolution, provincialism, and mode of life, 737-765. In Wiedmann, J. & Kullmann, J. (eds) International Conference ‘Cephalopods-Present and Past’. Schweizerbart, Stuttgart.

Wilmsen, M. & Mosavinia, A. 2011. Phenotypic plasticity and taxonomy of Schloenbachia varians (J. Sowerby, 1817). Paläontologische Zeitschrift 85, 169-184.View article

Wilmsen, M. & Niebuhr, B. 2009. Die Kreide der Elbezone. Exkursionsführer und Veröffentlichungen der Deutschen Gesellschaft für Geowissenschaften 241, 199-218.

Wilmsen, M., Niebuhr, B. & Chellouche, P. 2010a. Occurrence and significance of Cenomanian belemnites in the lower Danubian Cretaceous Group (Bavaria, southern Germany). Acta Geologica Polonica 60, 231-241.

Wilmsen, M., Niebuhr, B., Chellouche, P., Pürner, T. & Kling, M. 2010b. Facies pattern and sea-level dynamics of the early Late Cretaceous transgression: a case study from the lower Danubian Cretaceous Group (Bavaria, southern Germany). Facies 56, 483-507.View article

Wilmsen, M., Vodrážka, R. & Niebuhr, B. 2011. The Upper Cenomanian and Lower Turonian of Lockwitz (Dresden area, Saxony, Germany): lithofacies, stratigraphy and fauna of a transgressive succession. Freiberger Forschungshefte C 540, 27-45.

Wright, C.W. & Kennedy, W.J. 1981. The Ammonoidea of the Plenus Marls and the Middle Chalk. Monographs of the Palaeontological Society, London 560(134), 1-148.

Wright, C.W. & Kennedy, W.J. 1984. The Ammonoidea of the Lower Chalk. Part I. Monographs of the Palaeontological Society, London 567(137), 1-126.

Wright, C.J. & Kennedy, W.J. 1990. The Ammonoidea of the Lower Chalk. Part 3. Monographs of the Palaeontological Society, London 585(144), 219-294.

Wright, C.W. & Kennedy, W.J. 1996. The Ammonoidea of the Lower Chalk. Monographs of the Palaeontological Society, London 601(150), 320-403.

Wright, C.W., Callomon, J.H. & Howarth, M.K. 1996. Cretaceous Ammonoidea, 1-362. In Kaesler, R.L. (ed.) Treatise on Invertebrate Paleontology, Part L, Mollusca 4. The Geological Survey of America and University of Kansas, Lawrence.

Zaborski, P.M.P. 1995. The Upper Cretaceous ammonite Pseudaspidoceras Hyatt, 1903, in north-eastern Nigeria. Bulletin of the British Museum (Natural History), Geology 51, 53-72.

Žítt, J., Nekvasilová, O., Hradecká, L., Svobodová, M. & Záruba, B. 1998. Rocky coast facies of the Unhošť-Tursko high (Late Cenomanian-Early Turonian, Bohemian Cretaceous Basin). Acta Musei Nationalis Pragae, Series B - historia naturalis 54(3-4), 79-116.

Žítt, J., Vodrážka, R., Hradecká, L. & Svobodová, M. 2010. Palaeoenvironments and facies on a progressively flooded rocky island (Upper Cenomanian-Lower Turonian, Bohemian Cretaceous Basin). Journal of the National Museum (Prague), Natural History Series 179(22), 223-234.

Žítt, J., Vodrážka, R., Hradecká, L., Svobodová, M. & Zágoršek, K. 2006. Late Cretaceous environments and communities as recorded at Chrtníky (Bohemian Cretaceous Basin, Czech Republic). Bulletin of Geosciences 81, 43-79.View article