Semithin section and TEM micrographs of Osedax deceptionensis transition bone-roots a Eroded bone layer (bo) and root mucous sheath (ms) containing root cells (c).

Inset with two protein droplets (pro) close to the mucous sheath, b Detail of a nucleus (n) of a root cell and the highly convoluted root mucous sheath (ms). Lipid droplets (lip) into the root cell, c Vacuolar structure engulfing protein (pro) and lipid (lip) droplets, d Detail of vacuolar structure showing lipid droplets (lip) and granular inclusions (gin). Inset showing two granular inclusions in detail.