CIRCODISCINAE Dumitrica, 1989

Zhang, Lanlan & Suzuki, Noritoshi, 2017, Taxonomy and species diversity of Holocene pylonioid radiolarians from surface sediments of the northeastern Indian Ocean, Palaeontologia Electronica (Cambridge, England: 2003) 7 (8), pp. 1-68 : 54

Subfamily CIRCODISCINAE Dumitrica, 1989

Remarks. As Dumitrica (1989) noted, the central combination of this subfamily has a larnacillid-type central structure, but the overall appearance resembles members of the Spongodiscoidea. Based on the definition of Type 1 coordinates, the flat disk surface is placed on the Sg-plane to orient the Sg-axis vertical to the flat disk. The tunnel-like pylome is situated along one side of the Pl-axis. The flat disk appears rounded-quadrangular, elliptical, and oblong. The Ug- or Pr-axis is parallel to the Pl- or Lt-axis; the combination of axes under Type 1 and Type 2 coordinates differ among species. To account for their flat shape, we largely follow the terminology proposed by Ogane and Suzuki (2006) for flat-shaped radiolarians.