Bandel, K., & Boletzky, S. V. (1979). A comparative study of structure, development and morphological relationships of chambered cephalopod shells. Veliger,
21, 313–354.
Google Scholar
Bucher, H., Landman, N.H., Guex, J., Klofak, S.M. (1996). Mode and rate of growth in ammonoids. In N.H. Landman, K. Tanabe, R.A. Davis (Eds.). Ammonoid Paleobiology. Topics in Geobiology, 13, 407-461, New York, Plenum Press.
Dagys, A. S., & Weitschat, W. (1993). Extensive infraspecific variation in a Triassic ammonoid from Siberia. Lethaia,
26, 113–121.
Article
Google Scholar
De Baets, K., Klug, C., & Korn, D. (2009). Anetoceratinae (Ammonoidea, Early Devonian) from the Eifel and Harz Mountains (Germany), with a revision of their genera. Neues Jahrbuch für Geologie und Paläontologie Abhandlungen,
252, 361–376.
Article
Google Scholar
De Baets, K., Klug, C., Korn, D., & Landman, N. H. (2012). Early evolutionary trends in ammonoid embryonic development. Evolution,
66, 1788–1806.
Article
Google Scholar
De Baets, K., Klug, C., & Monnet, C. (2013). Intraspecific variability through ontogeny in early ammonoids. Paleobiology,
39, 75–94.
Article
Google Scholar
Hammer, O., & Bucher, H. (2005). Buckman´s first law of covariation—a case of proportionality. Lethaia,
38, 67–72.
Article
Google Scholar
Haring, E., Kruckenhauser, L., & Lukeneder, A. (2012). New DNA sequence data on the enigmatic Spirula spirula (Linnaeus, 1758) (Decabrachia, suborder Spirulina). Ann Naturhist Mus Wien B,
113, 37–48.
Google Scholar
Hoffmann, R., Lemanis, R., Naglik, C., & Klug, C. (2015). Ammonoid buoyancy. In C. Klug, D. Korn, K. De Baets, I. Kruta, & R. H. Mapes (Eds.), Ammonoid paleobiology (Vol. I, p. 43). Germany: From Anatomy to Ecology Topics in Geobiology.
Google Scholar
Hoffmann, R., Schultz, J. A., Schellhorn, R., Rybacki, E., Keupp, H., Gerden, S. R., et al. (2014). Non-invasive imaging methods applied to neo- and paleo- ontological cephalopod research. Biogeosciences,
11, 2721–2739.
Article
Google Scholar
Hoffmann, R., & Warnke, K. (2014). Spirula—das unbekannte Wesen aus der Tiefsee (Spirula—the unknown deep sea creature. Denisia,
32, 33–46.
Google Scholar
Hohenegger, J., & Tatzreiter, F. (1992). Morphometric methods in determination of ammonite species, exemplified through Balatonites shells (Middle Triassic). J Paleontol,
66, 801–816.
Google Scholar
Hölder, H. (1956). Über Anomalien an jurassischen Ammoniten. Paläontologische Zeitschrift,
30, 95–107.
Article
Google Scholar
Klug, C., Meyer, E., Richter, U., & Korn, D. (2008). Soft-tissue imprints in fossil and recent cephalopod septa and septum formation. Lethaia,
41, 477–492.
Article
Google Scholar
Korn, D. (2010). A key for the description of Palaeozoic ammonoids. Fossil Record,
13, 5–12.
Article
Google Scholar
Korn, D., & Klug, C. (2007). Conch form analysis, variability, morphological disparity, and mode of life of the frasnian (Late Devonian) ammonoid Manticoceras from coumiac (Montagne Noire, France). In N. H. Landman, R. A. Davis, & R. H. Mapes (Eds.), Cephalopods Present and Past—New Insights and Fresh Perspectives (pp. 57–85). Dordrecht: Springer.
Chapter
Google Scholar
Kraft, S., Korn, D., & Klug, C. (2008). Patterns of ontogenetic septal spacing in Carboniferus ammonoids. Neues Jahrbuch für Geologie und Paläontologie Abhandlungen,
250, 31–44.
Article
Google Scholar
Kröger, B. (2002). On the efficiency of the buoyancy apparatus in ammonoids: evidences from sublethal shell injuries. Lethaia,
35, 61–70.
Article
Google Scholar
Kröger, B. (2003). The size of the siphuncle in cephalopod evolution. Senckenbergiana Lethaea,
83, 39–52.
Article
Google Scholar
Kutygin, R. V. (1998). Forma rakovin permskikh ammonoidei severo-vostoka Rossii. Paleontologicheskiy Zhurnal,
1998(1), 20–31.
Google Scholar
Landman, N. H., Kennedy, W. J., Cobban, W. A., & Larson, N. L. (2010). Scaphites of the “Nodosus Group” from the Upper Cretaceous (Campanian) of the western interior of North America. Bulletin of the American Museum of Natural History,
342, 1–242.
Article
Google Scholar
Lemanis, R., Zachow, S., Fusseis, F., & Hoffmann, R. (2015). A new approach using high-resolution computed tomography to test the buoyant properties of chambered cephalopod shells. Paleobiology,
44, 313–329. doi:10.1017/pab.2014.17.
Article
Google Scholar
Linnaeus, C., (1758). Systema naturae per regna tria naturae, secundum classes, ordines, genera, species cum characteribus, differentiis, synonymis, locis. Editio decimal, reformata. Holmiae.
Lukeneder, A., Harzhauser, M., Müllegger, S., & Piller, W. E. (2008). Stable isotopes (δ18O and delta δ13C) in Spirula spirula shells from three major oceans indicate developmental changes paralleling depth distributions. Marine Biology,
154, 175–182.
Article
Google Scholar
Monnet, C., Bucher, H., Wasmer, M., & Guex, J. (2010). Revision of the genus Acrochordiceras Hyatt, 1877 (Ammonoidea, Middle Triassic): morphology, Biometry, Biostratigraphy and Intra-Specific Variability. Palaeontology,
53, 961–996.
Article
Google Scholar
Naglik, C., Monnet, C., Goetz, S., Kolb, C., De Baets, K., Tajika, A., & Klug, C. (2015). Growth trajectories of some major ammonoid subclades using grinding tomography data. Lethaia,
48, 29–46. doi:10.1111/let.12085.
Article
Google Scholar
Neige, P., & Warnke, K. (2010). Just how many species of Spirula are there? A morphometric approach. In K. Tanabe, Y. Shigeta, T. Sasaki, & H. Hirano (Eds.), Cephalopods Present and Past (pp. 57–85). Tokyo: Tokai University Press.
Google Scholar
Ruzhencev, V. E. (1960). Printsipy sistematiki, sistema i filogeniya paleozoyskikh ammonoidey. Trudy Paleontologicheskogo Instituta Akademia Nauk SSSR,
6, 1–331.
Google Scholar
Samadi, S., David, P., & Jarne, P. (2000). Variation of shell shape in the clonal snail Melanoides tuberculata and its consequences for the interpretation of fossil series. Evolution,
54, 492–502.
Article
Google Scholar
Scholz, H., & Glaubrecht, M. (2010). A new and open coiled Valvata (Gastropoda) from the Pliocene Koobi Fora formation of the Turkana Basin, Northern Kenya. Journal of Palaeontology,
84, 996–1002.
Article
Google Scholar
Seilacher, A., & Gunji, P. Y. (1993). Morphogenetic countdowns in heteromorph shells. Neues Jahrbuch für Geologie und Paläontologie Abhandlungen,
190, 237–265.
Google Scholar
Tanabe, K. (1993). Variability and mode of evolution of the Middle Cretaceous Ammonite Subprionocyclus (Ammonitina: Collignoniceratidae) from Japan. Geobios M.S.,
15, 347–357.
Article
Google Scholar
Teso, V., Signorelli, J. H., & Pastorino, G. (2011). Shell phenotypic variation in the south-western Atlantic gastropod Olivancillaria carcellesi (Mollusca: Olividae). Journal of the Marine Biological Association of the United Kingdom.,
91, 1089–1094.
Article
Google Scholar
Ward, P. D. (1987). The natural history of Nautilus. London: Unwin Hyman.
Google Scholar
Warnke, K. (2007). On the species status of Spirula spirula (Linné, 1758) (Cephalopoda): a new approach based on divergence of amino acid sequences between the canaries and new caledonia. In N. H. Landman, R. A. Davis, & R. H. Mapes (Eds.), Cephalopods present and past—new insights and fresh perspectives (pp. 144–155). Dordrecht: Springer.
Chapter
Google Scholar