Movie 4

Exception of the rule regarding rotation direction. If the eccentricity of an elliptical harmonic is very high, the number of generated lobes does not follow the rule-of-thumb proposed by Diaz et al. (1990). Here, EFA mode 3 generates a shape with 4 features, although its rotation direction is the same as the rotation direction of the first harmonic.

Morphometrics of complex cell shapes: lobe contribution elliptic Fourier analysis (LOCO-EFA)

Yara E. Sánchez-Corrales, Matthew Hartley, Jop van Rooij, Athanasius F.M. Marée, and Verônica A. Grieneisen

Development 2018. 145:None-None; doi: 10.1242/dev.156778