Geometric Analysis and Quantification of Coiling-Patterns of Gastropod Shells based on 3D and 2D Image Data
Gastropods have various forms of shells, and a coiling-pattern is a one of the most important traits. “Growing tube model” have been regarded as a general method to parameterize coiling-patterns of molluscan shells because this model is formulated by differential geometry (though Okamoto (1988) introduced it to describe shell forms of heteromorph ammonoids). Growing tube model, however, hardly used in empirical researches because it is too difficult to measure the morphological trait to estimate model’s parameters.
|Back: Japanese / English|