Restudy of a Miocene Bryozoan Species, Microporina articulata notoensis Sakakura, 1936 with Description of Another New Species from the Nanao Calcareous Sandstone

IF 1.3 4区地球科学 Q3 PALEONTOLOGY

Paleontological Research Pub Date : 2022-11-01 DOI:10.2517/PR210018

S. Arakawa

引用次数: 0

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.

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中新世Bryozoan物种的再研究，Microporina articulata notoensis Sakakura，1936年和Nanao钙质砂岩中另一新种的描述

摘要对来自Nanao钙质砂岩（中新世中期）的Microporina articulata notoensis Sakakura，1936进行了重新研究，并主要根据喷口形态对其进行了分类。Sakakura将沿着隐囊肿侧面的小凹陷解释为额外的小凹，但根据SEM图像，尚不清楚它们是否起到小凹的作用。将该种与日本新第三纪至新近纪的其他微孢子虫种进行了比较，并建立了一个新的微孢子虫岩芽孢属（Microporina iwayaensis sp.nov.）。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Paleontological Research PALEONTOLOGY-

CiteScore

1.60

自引率

0.00%

发文量

审稿时长

>12 weeks

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).