Structure of the calcitic layer of the aptychus of the ammonite genus Peltoceras

• Autorzy: Mironenko Aleksandr A.

Identyfikatory

DOI

10.14241/asgp.2021.17

• Języki publikacji: EN

Abstrakty

EN

The aptychi of ammonites combined the functions of lower jaws and protective opercula. They consist of two parts: an inner organic layer and an outer calcitic lamella. In different evolutionary lineages of ammonites, the shape of aptychi, the sculpture of their surface and the microstructure of the calcitic layer vary greatly. However, the structure of the aptychi is not known for all evolutionary lineages of ammonites. Although numerous aptychi have been described for the Jurassic family Aspidoceratidae, almost all of them belong to only one evolutionary branch of this family – the Aspidoceratinae (sensu lato). For the second branch – the Peltoceratinae, only one aptychus had been described to date and the structure of its calcitic layer remained unknown. In this article, for the first time, the structure of the aptychus of the Peltoceratinae (upper Callovian Peltoceras) is described. The surface of this aptychus is covered with rough ribs and the calcitic part consists of only one layer of dense calcite. The thickness of the aptychus is much greater than that of the aptychi of supposed ancestors of the Peltoceratinae. The increase in the thickness of the aptychi in both the Aspidoceratinae and the Peltoceratinae, contemporaneously with the appearance of spines on their shells, is most likely related to increasing the protective function of the aptychi of these ammonites in the late Callovian.

Słowa kluczowe

EN

Aspidoceratidae; Peltoceratinae; Peltoceras; aptychi; ammonites; Jurassic

• Wydawca: Polskie Towarzystwo Geologiczne
• Czasopismo: Annales Societatis Geologorum Poloniae
• Rocznik: 2021
• Tom: Vol. 91, No. 4
• Strony: 397--404
• Opis fizyczny: Bibliogr. 40 poz., fot., rys.

Twórcy

autor

Mironenko Aleksandr A.

• Geological Institute of Russian Academy of Sciences, Pyzhevski Lane 7, Moscow 119017, Russia

Bibliografia

• 1. Arkell, W. J., 1957. Mesozoic Ammonoidea. In: Moore, R. C. (ed.), Treatise on Invertebrate Paleontology L, Mollusca 4. Geological Society of America, Boulder, Colorado, and University Kansas Press, Lawrence, Kansas, 489 pp.
• 2. Bert, D., 2004. Revision, etude systematique et evolution du genre Gregoryceras Spath, 1924 (Ammonidea, Oxfordien). Annales du Muséum d'Histoire Naturelle de Nice, 19: 1-183.
• 3. Bonnot, A., 1995. Les Aspidoceratidae d'Europe occidentale au Callovien supérieur et a l'Oxfordien mférieur. These Université, inédit, Dijon, 444 pp.
• 4. Callomon, W. J., 1963. Sexual dimorphism in Jurassic ammonites. Transactions of the Leicester Literary and Philosophical Society, 57: 21-57.
• 5. Donovan, D. T., Callomon, J. H. & Howarth, M. K., 1981. Classification of the Jurassic Ammonitina. In: House, M. R. & Senior, J. R. (eds), The Ammonoidea. The Systematics Association, Special Volume 18. Academic Press, London, pp. 101-155.
• 6. Énay, R., 1962. Contribution a l'étude paléontologique de l'Oxfordien supérieur de Trept (Isere): I. Stratigraphie et Ammonites. Travaux du Laboratoire de Géologie Lyon (new series), 8: 7-81.
• 7. Énay, R. & Howarth, M. K., 2019. Systematic descriptions of the Perisphinctoidea. Part L, revised, vol. 3B, chapter 7. Treatise Online, 120: 1-184.
• 8. Engeser, T. & Keupp, H., 2002. Phylogeny of the aptychi-possessing Neoammonoidea (Aptychophora nov., Cephalopoda). Lethaia, 34: 79-96.
• 9. Farinacci, A., Mariotti, N., Matteucci, R., Nicosia, U. & Pallini, G., 1976. Structural features of some Jurassic and early Cretaceous aptychi. Bolletino della Societa Paleontologica Italiana, 15: 11-143.
• 10. Frerichs, U., 2004. Anaptychen und Aptychen-Kieferapparate oder Deckel. Arbeitskreis Paläontologie Hannover, 32: 1-15.
• 11. Gąsiorowski, S. M., 1960. Remarques sur les Laevaptychi. Annales de la Société géologique de Pologne, 30, 59-97.
• 12. Hoffmann, R., Slattery, J. S., Kruta, I., Linzmeier, B. J., Lemanis, R. S., Mironenko, A., Goolaerts, S., De Baets, K., Peterman, D. J. & Klug, C., 2021. Recent advances in heteromorph ammonoid palaeobiology. Biological Reviews, 96: 576-610.
• 13. Keupp, H., 2012. Atlas zur Paläopathologie der Cephalopoden. Berliner paläobiologische Abhandlungen, 12: 1-390.
• 14. Keupp, H., Hoffmann, R., Stevens, K. & Albersdörfer, R., 2016. Key innovations in Mesozoic ammonoids: the multicuspidate radula and the calcified aptychus. Palaeontology, 59: 775-791.
• 15. Keupp, H. & Ilg, A., 1992. Paläopathologie der Ammonitenfauna aus dem Obercallovium der Normandie und ihre palökologische Interpretation. Berliner Geowissenschaftlische Abhhandlungen, Reiche E, 3: 171-189.
• 16. Kiselev, D. N. & Rogov, M. A., 2018. Detailed biostratigraphy of the Middle Callovian-lowest Oxfordian in the Mikhaylov reference section (Ryazan region, European part of Russia) by ammonites. Volumina Jurassica, 16: 73-186.
• 17. Kröger, B., 2002. Antipredatory traits of the ammonoid shell - indications from Jurassic ammonoids with sublethal injuries. Paläontologische Zeitschrift, 76: 223-234.
• 18. Kruta, I., Rouget, I., Landman, N. H., Tanabe, K. & Cecca, F., 2009. Aptychi microstructure in Late Cretaceous Ancyloceratina (Ammonoidea). Lethaia, 42: 312-321.
• 19. Lehmann, U., 1972. Aptychen als Kieferelemente der Ammoniten. Paläontologische Zeitschrift, 46: 34-48.
• 20. Lehmann, U. & Kulicki, C., 1990. Double function of aptychi (Ammonoidea) as jaw elements and opercula. Lethaia, 23: 325-331.
• 21. Mangold, C., 1970. Les Perisphinctidae (Ammonitina) du Jura méridional au Bathonien et au Callovien. Documents des Laboratoires de Géologie de la Faculté des Sciences de Lyon, 41: 1-246.
• 22. Miller, A., 1968. Die Subfamilie Euaspidoceratinae Spath (Ammonoidea). Morphologie, Taxonomie, Stratigraphie, Phylogenie. Inaugural Dissertation. Universität Tübingen, 169 pp.
• 23. Mironenko, A. A., 2017. Sublethal injuries on the shells of Jurassic ammonites from Central Russia. In: Rogov, M. A. & Zakharov, V. A. (eds), Jurassic Deposits of the Southern Part of the Moscow Syneclise and Their Fauna. Transaction of the Geological Institute, pp. 183-208 [In Russian, with English abstract.]
• 24. Mironenko, A. A., 2018. Microstructure of aptychi of Upper Jurassic (Upper Oxfordian) ammonites from Central Russia. Lethaia, 51: 75-85.
• 25. Neumayr, M., 1871. Jurastudien. Die Vertretung der Oxfordgruppe im östlischen Theile der Mediterranen Provinz. Jahrbuch der Kaiserlich-Königlichen Geologischen Reichanstalt, 21: 355-378.
• 26. Page, K. N., 1991. Ammonites. In: Martill, D. M. & Hudson D. J. (eds), Fossils of the Oxford Clay. The Palaeontological Association, London. Henry Ling Ltd, Dorchester, Dorset, pp. 87-143.
• 27. Page, K. N., 2008. The evolution and geography of Jurassic ammonoids. Proceedings of the Geologists' Association, 119: 35-57.
• 28. Parent, H., Schweigert, G. & Scherzinger, A., 2020. A review of the classification of Jurassic aspidoceratid ammonites - the Superfamily Aspidoceratoidea. Volumina Jurassica, 18: 47-52.
• 29. Parent, H. & Westermann, G. E. G., 2016. Jurassic ammonite aptychi: functions and evolutionary implications. Swiss Journal of Palaeontology, 135: 101-108.
• 30. Parent, H., Westermann, G. E. G. & Chamberlain, J. A., 2014. Ammonite aptychi: functions and role in propulsion. Geobios, 47: 45-55.
• 31. Radtke, G., Hoffmann, R. & Keupp, H., 2016. Form and formation of flares and parabolae based on new observations of the internal shell structure in lytoceratid and perisphinctid ammonoids. Acta Palaentologica Polonica, 61: 503-517.
• 32. Rogov, M. A., 2004. Middle and late Callovian aptychi (Ammonoidea) of the Russian Plate. Paleontological Journal, 38: 27-34.
• 33. Rogov, M. A. & Mironenko, A. A., 2016. Patterns of the evolution of aptychi of Middle Jurassic to Early Cretaceous Boreal ammonites. Swiss Journal of Palaeontology, 135: 139-151.
• 34. Roman, F., 1938. Les Ammonites Jurassiques et Crétacées. Essai de Genera. Masson et Editeurs, Paris, 547 pp.
• 35. Schindewolf, O. H., 1958. Über Aptychen (Ammonoidea). Palaeontographica, Abteilung A, 111: 1-46.
• 36. Spath, L. F., 1931. Revision of the Jurassic Cephalopod fauna of Kachh (Cutch). Part V. Memoirs of the Geological Survey of India. Palaeontologia Indica, 9: 551-658.
• 37. Tanabe, K., Kruta, I. & Landman, N. H., 2015. Ammonoid buccal mass and jaw apparatus. In: Klug, C., Korn, D., De Baets, K., Kruta, I. & Mapes, R. H. (eds), Ammonoid Paleobiology: From Anatomy to Ecology. Topics in Geobiology, volume 43. Springer, Dordrecht, pp. 439-494.
• 38. Trauth, F., 1927-1936. Aptychenstudien, I-VII. Annalen des Naturhistorischen Museums in Wien, 41 (1927): 171-259; 42 (1928): 171-259; 44 (1930): 329-411; 45 (1931): 17-136; 47 (1936): 127-145.
• 39. Waagen, W., 1875. The Cephalopoda. Jurassic fauna of Kutch, Volume 1. Memoirs of the Geological Survey of India. Palaeontologia Indica, 9: 1-247.
• 40. Zeiss, A., Leanza, H. A., 2010. Upper Jurassic (Tithonian) ammonites from the lithographic limestones of the Zapala region, Neuquén Basin, Argentina. Beringeria, 41: 25-76.