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A Method for Quantifying, Visualising, and Analysing Gastropod Shell Form.

Thor-Seng Liew^1,2,3, Menno Schilthuizen^1,2,3

¹Institute for Tropical Biology and Conservation, Universiti Malaysia Sabah, Jalan UMS, 88400, Kota Kinabalu, Sabah, Malaysia.

|June 10, 2016

Summary

This summary is machine-generated.

Quantifying gastropod shell form is challenging. This study introduces a novel workflow using theoretical modeling of aperture ontogeny profiles to robustly analyze shell shape, aiding evolutionary and taxonomic studies.

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Area of Science:

Morphometrics
Developmental Biology
Malacology

Background:

Quantitative analysis of organismal form is crucial in biology.
Gastropod shell form presents measurement challenges due to spiral shapes and lack of homologous structures.

Purpose of the Study:

To develop a robust and versatile workflow for the quantitative analysis of gastropod shell form.
To address the difficulties in measuring spiral shell shapes using linear measurements.

Main Methods:

Theoretical modeling of shell form based on aperture ontogeny profiles.
Workflow includes data preparation (retopology), acquisition (calculating trajectory, size, shape), and analysis (qualitative and quantitative comparisons).
Method evaluated on diverse shells from genera Opisthostoma and Plectostoma.

Main Results:

The developed workflow provides a robust, reproducible, and versatile approach for analyzing gastropod shell form.
Aperture ontogeny profiles (curvature, torsion, size, shape) effectively capture shell morphology.
Successful application on genera with high shell form variability.

Conclusions:

The proposed method offers a significant advancement in quantifying gastropod shell morphology.
Potential applications include functional morphology, theoretical modeling, taxonomy, and evolutionary biology.
This approach overcomes limitations of traditional linear measurements for complex spiral forms.