"Calydiscoides difficilis" . . "Calydiscoides difficilis" . "Calydiscoides difficilis (Yamaguti, 1953)" . . . "838356" . _:b76640997 "WoRMS id" . . _:b76640997 "518318" . "518318" . . . _:b76640997 . "(Yamaguti, 1953)" . . _:b76640997 . "Calydiscoides difficilis" . _:b76640997 . . .