Morphological insights from extremely well-preserved Parafollicucullus (Radiolaria, Order Albaillellaria) from a probable Roadian (Guadalupian, middle Permian) manganese nodule in the Nishiki Group of the Akiyoshi Belt, Southwest Japan. Paleontological Research, 24(2), Apr 2020: 161-177. 173 [Zoological Record Volume 156]