SEE SEILACHER 2007, pp. 142-145 for chracterisations!!!
Branches are very long having only a few secondary ramifications. The trace has two different sides: On one side, branches curve back and stop short of more proximal ones which indicates a protrusive way of construction. On the other side of the system the branches are straight and their secondary branches end shortly in front of distal ones indicating a retrusive way of construction (SEILACHER 2007, p. 144).