Asteroschema cf. bidwillae McKnight, 2000 (IDSSE-EEB-SW0105) A, B lateral arm plate (external, internal) C outer arm spine (middle) D arm spine (distal) E skin from dorsal arm base (rounded to irregular-shaped granular ossicles) F–J vertebrae F proximal view G distal view H lateral view I dorsal view J ventral view. Abbreviations: asa arm spine articulation, d dorsal, de depression, dist distal, lac lateral ambulacral canals, mo muscle opening, no nerve opening, pb podial basin, prox proximal, st secondary teeth, v ventral. Scale bars: 800 µm (F–J); 500 µm (C); 300 µm (A, B, E); 200 µm (D).