Fig. 1
From: A methodological exploration to study 2D arm kinematics in Ophiuroidea (Echinodermata)
Superimposed and aligned curve of the arms in frames 1–5 within one trial for O. scolopendrina (A), M. hirsuta (B) and O. superba (C) after axes transformation and axes rotation. The lower right corner of plot A shows an arm configuration before axis transformation (A′). The filled circles on the arms show equidistant landmarks. The arm numbers in each plot follows A′. The axes imply the X and Y coordinates in the transformed Cartesian coordinate system in cm