Species of family “Nummulitidae” (11)

Cycloclypeus carpenteri

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

Original description Brady, H.B., 1881, Quart. J. Microscop. Scie. (London), 21, 31-71
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
Further reference Hohenegger, J., 2009, Galaxea, Journal of Coral Reef Studies., 2, 81-89

General description

Large discoidal test with annular chambers divided into chamberlets by secondary septa. Brownish colour in living specimens due to diatom endosymbionts.

Representative pictures

Cycloclypeus carpenteri Cycloclypeus carpenteri, gamont, Japan, Sesoko Cycloclypeus carpenteri
2 specimens

Heterostegina depressa

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

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., 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 Hottinger, L., 1977, Mémoires du Muséum National d`Histoire Naturelle, Paris., 40, Série C, 1-159

General description

Central part of the test is thickened, early chambers are undivided, later ones are divided by secondary septa. Diatom symbionts lead to a brownish colour in living specimens.

Representative pictures

Heterostegina depressa Heterostegina depressa Heterostegina depressa
6 specimens

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 ammonoides

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

Original description Gronovius, L., T., 1781, Haak et Cie (Leyden), Tome 3., 241-380
Description Hohenegger, J., Yordanova, E., Hatta, A., 2000, J. Foram. Res., 30, 3-28
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)

General description

Semiinvolute test with undivided chambers and ornamented surface.Brownish colour in living specimens due to diatom symbionts.

Representative pictures

Operculina ammonoides Opercilina ammonoides, Japan, Sesoko Operculina ammonoides, Japan, Sesoko
2 specimens

Operculina complanata

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

Original description DeFrance, M., J., L., 1822, Tome 25, Dictionnaire des Sciences Naturelles, F. G. Levrault, Paris, 453
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

Flat test, semiinvolute to evolute, scarcely covered with knobs. Chambers are undivided. Living specimens show a brownish colour caused by diatom symbionts.

Representative pictures

Operculina complanata
4 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

Operculina elegans

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

Original description Cushman, A., J., 1921, U. S. Nat. Mus. Bull. Washington, D. C., USA, 4
Further reference Holzmann, M., Berney, C., Hohenegger, J., 2006, Symbiosis, 42, 93-101 (3.03 MB)
Description Yordanova, E., Hohenegger, J., 2004, Micropaleontology, 50, 149-177

General description

Flat semiinvolute to evolute tests and nearly smooth test surfaces, scarcely covered with knobs. O. elegans resemblesin these aspects O.complanata. What distinguishes the two species are septal flaps that are smooth in O. elegans and folded in O. complanata. Brownish colour in living specimens caused by diatom symbionts.

Representative pictures

Operculina elegans
1 specimen

Operculinella cumingii

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

Original description Carpenter, W., B., 1859, Royal Soc. London, Philos. Trans., 149, 1-41
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

Smooth exterior, undivided chambers. External similarities in shape to N. venosus but is distinguished by the latter by the possession of trabeculae. Brownish colour in living specimens caused by diatom symbionts.

Representative pictures

Operculinella cumingii
2 specimens

Planoperculina heterosteginoides

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

Original description Hofker, J., 1933, Dansk Naturh. Foren. Kobenhavn, Vidensk. Meddel., Kobenhavn, Danmark., 148
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 fragile test, chambers are incompletely divided by secondary septa into chamberlets. Surface ornamentation in form of knobs around the center of the test. Brownish colour in living specimens due to diatom symbionts.

Representative pictures

Planoperculina heterosteginoides Planoperculina heterosteginoides; Japan, Sesoko Planoperculina heterosteginoides; Japan, Sesoko Planoperculina heterosteginoides; Japan, Sesoko
1 specimen

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