Astrodendrum cf. sagaminum (Döderlein, 1902) (IDSSE-EEB-SW0104) A lateral arm plate (middle) B plan view of baseplate C pedicellariae D arm spine on distal end E–J vertebrae on middle half of arm E proximal view of branch vertebrae F proximal view G distal view H lateral view I dorsal view J ventral view K–N vertebrae on distal end of arm K distal view L proximal view M lateral view N ventral view. Abbreviations: ap articular pad of the base, au auricle, d dorsal, dist distal, fo foramina of the base, fs fossa between adjacent tubercles, hd head of the apophysis, lac lateral ambulacral canals, mo muscle opening, no nerve opening, pd pedicel of the apophysis, prox proximal, pt primary tooth of the blade, sh sheath of the baseplate, su sulcus of tubercle head, v ventral. Scale bars: 800 µm (E–J); 500 µm (A, B); 300 µm (K–N); 200 µm (D); 80 µm (C).