Some new records for cirripedes from the Pliocene–Pleistocene of Southwest Japan, with two new species of Balanomorpha

Abstract

Barnacles (Cirripedia, Thoracica) from the Pliocene–Pleistocene deposits of Southwest Japan are examined. As a result of this study, six species in six genera, representing new records for the Japanese Pliocene–Pleistocene, are reported. Two new species, Tubicinella nodai from the Lower Pleistocene Shinzato Formation and Striatobalanus makiyamai from the Lower Pleistocene Dainichi Formation are described. Conopea granulata (Hiro, 1937) from the Shinzato Formation is recorded for the first time from the Lower Pleistocene of Japan. Octolasmis orthogonia (Darwin, 1852 [1851]) from the Dainichi Formation is the oldest record of Japan. The occurrences of Verruca stroemia (O. F. Müller, 1776) from the Zukawa and Dainichi formations show that this species survived in Japan from the Late Pliocene to Early Pleistocene. Cetopirus complanatus (Mörch, 1853) from the Upper Pleistocene Wan Formation represents the youngest fossil record of Japan.