Neopentadactyla mixta (Östergren, 1898) A focus-stacked view of the dorsal-lateral view of dissected specimen B focus-stacked view of the ventral–lateral view of dissected specimen C focus-stacked view of the dorsal–lateral view of a non-dissected specimen D focus-stacked view of the ventral–lateral view of a non-dissected specimen E SEM view of the rosettes from the shaft of a tentacle F SEM view of the 2-pillared tables from the introvert G SEM view of the rods and rosettes from a tentacle tip H SEM view of the 4-pillared tables from the dorsal body wall I SEM view of the 4-pillared tables from the ventral body wall J SEM view of the plates from the dorsal tube feet K SEM view of the plates from the ventral tube feet L SEM view of half of an end-plate from a ventral tube foot. Scale bars: 1 cm (A–D); 50 μm (E–L).