4510 Hexatrygon bickelli Heemstra & Smith, 1980 Hexatrygonidae Sixgill stingrays Myliobatiformes Elasmobranchii Sixgill stingray Indo-Pacific: South Africa eastward to Japan, Australia and the Hawaiian Islands. FB 2737291 Hexatrematobatis longirostrum 350 - 1000 m FB 2813692 10 N 74 E 2009 Hexatrygon bickelli 508 m