Restudy of a Miocene Bryozoan Species, Microporina articulata notoensis Sakakura, 1936 with Description of Another New Species from the Nanao Calcareous Sandstone
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Abstract
Abstract. Microporina articulata notoensis Sakakura, 1936, from the Nanao Calcareous Sandstone (Middle Miocene) was restudied and raised to species rank, mainly based on the orifice morphology. Sakakura interpreted small depressions along lateral sides of the cryptocyst as additional opesiules, but it is not clear whether they function as opesiules or not, based on the SEM image. This and other Neogene to Recent Microporina species in Japan are compared, and one more species, Microporina iwayaensis sp. nov. is erected.
期刊介绍：
Paleonotological Research (PR) is a quarterly, peer-reviewed international journal, which focuses on original contributions primarily in the area of paleontology but also covering a wide range of allied sciences. It has been published since 1997 as a successor to the former journal Transactions and Proceedings of the Palaeontological Society of Japan. The emphasis of contributions will include global and local perspectives, and contents can cover all ages (Precambrian to the Quaternary, including the present time).
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