Late Early Permian (Kungurian) fusulines from Kamiishizu, south of Sekigahara, Gifu Prefecture, Japan

Abstract

Skinnerella kamiishizuensis sp. nov. and Cuniculinella? isomie (Igo) are systematically described. These two fusulines were collected from conglomeratic limestone exposed at Kamiishizu, south of Sekigahara, Gifu Prefecture, central Japan. They indicate late Early Permian (late Kungurian in the standard time-scale, Bolorian in the Tethyan) by their association with Misellina dyhrenfurthi (Dutkevich). Skinnerella kamiishizuensis is distinguished from the previously described species in having strongly and rather regularly fluted septa throughout the test, indistinct cuniculi, and welldeveloped axial fi lling. This species is assignable to the genus by almost the same test size both in the megalospheric and microspheric forms.