Species found in “Japan, Motobu, Okinawa” (3)

Nummulites venosus

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

Original description Fichtel, L., Moll, J., P., C., 1798, Vienna, Camesina
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
Description Hottinger, L., 1977, Mémoires du Muséum National d`Histoire Naturelle, Paris., 40, Série C, 1-159

General description

Involute test, planispirally enrolled with undivided chambers. Living specimens are brownish due to diatom endosymbionts

Representative pictures

Nummulites venosus Nummulites venosus
3 specimens

Operculina discoidalis

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

Original description Orbigny, A. D’, 1826, Annales du Museum d’Histoire Naturelles, Paris, 7, 1-275
Description Hohenegger, J., Yordanova, E., Hatta, A., 2000, J. Foram. Res., 30, 3-28
Further reference Holzmann, M., Berney, C., Hohenegger, J., 2006, Symbiosis, 42, 93-101 (3.03 MB)

General description

Involute test with prominent surface ornamentation and undivided chambers. Brownish colour in living specimens caused by diatom symbionts.

Representative pictures

Operculina discoidalis
2 specimens