title: The form of the globiferous pedicellarial ossicles of the regular echinoid, Psammechinus miliaris Gmelin.
abstract: The form of the globiferous pedicellariae from Psammechinus miliaris is described. The valve ossicle resembles that of Parechinus in its triangular valve shape and open blade form, contrasting with Echinus in these features. The present study indicates that the relationship of the valve nerve pathway to the skeletal ossicle is related to the form of the distal blade. It is proposed that subterminal teeth or a tubular blade may be alternative structural devices for strengthening the venom tooth during venom injection.
mesh_terms: D000818:Animals; D001369:Axons / Q000648:ultrastructure; D008855:Microscopy, Electron, Scanning; D009132:Muscles / Q000294:innervation / Q000648:ultrastructure; D012617:Sea Urchins / Q000648:ultrastructure*; D014688:Venoms
chemical_list: D014688:Venoms