WEBMay 9, 2024 · Species Oithona vivida Farran, 1913 Species Oithona wellershausi Ferrari F.D., 1982 Species Oithona alia (Kiefer, 1935) accepted as Oithona rigida Giesbrecht, 1896 accepted as Dioithona rigida (Giesbrecht, 1896) (synonym according to Nishida, 1985)