宮城県中平層産前期ペルム紀オーロポーラ目床板珊瑚の1新種,Mandulapora jimboi

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A new species of the periphaceloporid (Auloporida) tabulate coral, Mandulapora jimboi, is described from the Early Permian (most probably Artinskian) limestone of the Nakadaira Formation, Southern Kitakami Terrane in the Kamiyasse area, Miyagi Prefecture. This species differs from the two previously known forms, Middle Permian Mandulapora permica and Early to Middle Carboniferous M. yamagiwai, by the combination of its small corallite diameters, well-developed phaceloid portion, usually long septal spines, and rare and weakly sagging tabulae. The present discovery notes the first Permian occurrence outside Inner Mongolia and supplements stratigraphic gap of the fossil records of Mandulapora.
国立科学博物館の論文