Listing species

Planostegina longisepta

Order “Rotaliida” > Family “Nummulitidae” > Genus “Planostegina

Original description Zheng, S., Y., 1979, Stud. Mar. Sin., 15, 1-27
Further reference Holzmann, M., Berney, C., Hohenegger, J., 2006, Symbiosis, 42, 93-101 (3.03 MB)
Description Hohenegger, J., 2004, J. For. Res., 34, 9-33

General description

Very flat and evolute test with granular surface ornamentation. Chambers are divided into chamberlets by secondary septa. Diatom symbionts cause brownish colour in living specimens.

Representative pictures

Planostegina longisepta Planostegina longisepta, Japan, Sesoko Planostegina longisepta, Japan, Sesoko
1 specimen

Planostegina operculinoides

Order “Rotaliida” > Family “Nummulitidae” > Genus “Planostegina

Original description Hofker, J., 1927, In: Siboga Expeditie; Uitkomsten op zoologisch, botanisch, oceanographisch en geologisch gebied,versameld in Nedelandsch Oost-Indi 1899-1900 aan boord H.M. Siboga. Leiden, E. J. Brill, Monografen 4, 1-78
Further reference Holzmann M., Hohenegger J., Pawlowski J., 2003, J. For. Res., 33, 277-284 (127 KB)
Further reference Holzmann, M., Berney, C., Hohenegger, J., 2006, Symbiosis, 42, 93-101 (3.03 MB)
Description Hohenegger, J., Yordanova, E., Hatta, A., 2000, J. Foram. Res., 30, 3-28

General description

Flat and thin test, chambers are divided by secondary septa into chamberlets. In P. operculinoides surface ornamentation is present in the form of knobs around the center of the test , it is less pronounced than in P. longisepta. Brownish colour in living specimens due to diatom symbionts.

Representative pictures

Planostegina operculinoides Planostegina operculinoides, Japan, Minna Jima Planostegina operculinoides, Japan, Minna Jima
2 specimens