Fossil whale barnacles (Balanomorpha: Coronulidae) deposited in the Mizunami Fossil Museum, are classified. Seven species in three genera of whale barnacles from the Pliocene–Pleistocene deposits of Japan are recorded and illustrated. Cetopirus complanatus
(Mörch) from the Middle Pleistocene, Coronula reginae
Darwin from the Lower Pleistocene (Calabrian), and Cryptolepas rachianecti
Dall from the Lower Pleistocene (Gelasian) are first reported in the Japanese fossil records. Coronula
Lamarck comprises five species, C. barbara
Darwin from the Lower Pleistocene, C. bifida
Bronn from the Lower Pliocene–Lower Pleistocene (Gelasian), C. diadema
(Linnaeus) from the Lower Pleistocene (Calabrian)–Middle Pleistocene, C. reginae
from the Lower Pleistocene (Calabrian), and C.
sp. from the Middle Pleistocene. A compartment of an undetermined coronulid genus and species from the Lower Pleistocene (Gelasian) compared with that of Tubicinella major
Lamarck and Cetolepas hertleini
Zullo is also described.
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