. . . . _:b75421856 "AlgaeBase id" . . . "Navicula gemma" . "Navicula gemma Ehrenb., 1840" . "842621" . . "Ehrenb., 1840" . _:b75421856 . _:b75421856 . "Navicula gemma" . "m0dab4e36912dfeba" . _:b75421856 . _:b75421856 "m0dab4e36912dfeba" .