Iodictyum akaishiensis sp. nov.: A New Miocene Phidoloporid (Bryozoa, Cheilostomata) from the Moniwa Formation, Sendai, Japan

Shinji Arakawa

doi:10.2517/PR200041

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Shinji Arakawa¹

¹1-1-13 Takamagahara, Kashima, Ibaraki 314-0005, Japan (e-mail: )

Abstract

A new Miocene phidoloporid, Iodictyum akaishiensis sp. nov., was collected from the Moniwa Formation (Langhian) near the Akaishi Bridge, Sendai City, Japan. It is the first fossil record of Iodictyum in Japan, and the fifth discovery of Miocene fossils of the genus from the Indo-Pacific area. The species resembles some Recent species from the western Pacific, especially in the large marginal pores, an open peristomial sinus and shaft, and subtriangular ooecial labellum. The characteristics of Iodictyum from Eocene to Recent are compared, and the trend of evolution in the genus is inferred.

Citation Download Citation

Shinji Arakawa "Iodictyum akaishiensis sp. nov.: A New Miocene Phidoloporid (Bryozoa, Cheilostomata) from the Moniwa Formation, Sendai, Japan," Paleontological Research 27(1), 25-33, (1 October 2022). https://doi.org/10.2517/PR200041

Received: 9 October 2020; Accepted: 8 July 2021; Published: 1 October 2022

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