Qiuripylolena pompon, Zhang & Suzuki, 2017

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 : 52-53

Qiuripylolena pompon n. sp.

Figure 30.11-22

zoobank.org/ 9B1C60D2-81AB-4217-B48C-CA3BC37658E3

Etymology. The Latinized neuter noun from an English word, “pompon .”

Holotype. Specimen in Figure 30.19-20 from the sample YDY05-01.

Paratype. Specimen in Figure 30.13-14 from the sample YDY05-01.

Description. Test is spherical in shape and consists of a larnacillid central combination, a pseudo-concentric shell, and a spherical to ellipsoid complete concentric shell. The side of the pseudo-concentric shell is close or attached to the next concentric shell. This spherical to ellipsoid complete pseudo-concentric shell has weak depressions on both Lt-axis sides of the central combination, whereas the Pl-axis sides of the central combination have weak prominences. Pore frames of the pseudo-concentric shell are robust, the pores are polygonal in shape, and the size of pores is variable. Fine spines are radially distributed over the outermost pseudo-concentric shell.

Remarks. Qiuripylolena pompon n. sp. differs from Qiuripylolena chikuchik n. sp. in that the latter has a more loosely concentric structure, a more rounded quadrangular concentric shell, and a greater number of radial spines. Qiuripylolena pompon n. sp. is easily distinguished from Qiuripylolena? multiconcentrica n. sp. based on the former’s presence of larger 1st pseudo-concentric shell.

Dimensions. Based on the holotype specimen. The length and width of the outer concentric shell: 81.1 μm and 78.6 μm; The ratio of length to width of the outer concentric shell: ca. 1.0. The length space between the outer concentric shell and the 1st pseudo-concentric shell: 12.1 μm; The length space between the 1st pseudo-concentric shell and the central combination: 14.5 μm.

Figures

FIGURE 30. Photographs of the encountered morphotypes of Qiuripylolena. 1-10, Qiuripylolena chikuchik n. sp.; 11- 22, Qiuripylolena pompon n. sp.; 23-34, Qiuripylolena? multiconcentica n. sp. All are Sg-view at Type 1. Scale bar equals 0.1 mm. All specimens are from YDY05-01.