Fig. 3

Representations of three-dimensional (3D) data from the axial skeleton of outgroup taxon Medorippe lanata. The species is also represented by an image showing the cephalothorax with right 5th pereiopod in dorsal view. 3D model is supplied in Additional file 11. IntPl interopleurite (with number pair indicating thoracomeres between which it is situated), IntSt Interosternite (with number pair indicating thoracomeres between which it is situated), JP junction plate, ST sella turcica