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Photographs Osedax japonicus. a An adult female living on a bone. White spots around the female are embryos spawned into transparent mucus. b An adult female exposed on a bone. The dot line indicates the position that was cut for RNA extraction. Upper and lower fragments are trunk palps (trunk) and root + ovisac (root), respectively. c A dwarf male. d A larva with settlement competency. b, bone; em, embryo; ov, ovisac; p, palp; r, root; t, trunk. Scale bars: B = 2 mm; C and D = 20 μm
