Listing species

Elphidium albiumbilicatum

Order “Rotaliida” > Family “Elphidiidae” > Genus “Elphidium

Original description Weiss Lawrence, 1954, Survey Prof. Paper
Further reference Pillet L, de Vargas C, Pawlowski J, 2011-07-01, Protist, 162, 3, 394-404

General description

Test planispiral, bilaterally symmetrical; sutural canal system opens into a single row of pores; septal bridges usually hollow and contain a retral process; aperture a series of large circular pores at base of aperture face.

Representative pictures

1 specimen

Elphidium excavatum

Order “Rotaliida” > Family “Elphidiidae” > Genus “Elphidium

Original description Terquem, O., 1875
Description Hayward, B., W., Hollis, C., Grenfell., H., 1997, New Zealand Geol. Surv. Paleontol. Bull., 72, Institute of Geological and Nuclear Sciences monograph 16.

General description

Test involute, envenly rounded to lobulate; periphery broadly rounded to sub-acute, no keel; papillae ornament sutural pits umbilicus and base of aperture face; umbilicus depressed or filled with one or more bosses.

Representative pictures

2 specimens

Elphidium margaritaceum

Order “Rotaliida” > Family “Elphidiidae” > Genus “Elphidium

Original description Cushman, J. A., 1930, United States National Museum bulletin 104, 79pp.
Description Buzas, M., A., Culver, S., J., Isham, L., B., 1985, Journal of Paleontology, 59, 1075-1090

General description

Test planispiral, bilaterally symmetrical; sutural canal system opens into a single row of pores; septal bridges usually hollow and contain a retral process; aperture a series of large circular pores at base of aperture face.

Representative pictures

2 specimens

Elphidium williamsoni

Order “Rotaliida” > Family “Elphidiidae” > Genus “Elphidium

Original description Haynes, J., R., 1973, Bull. Br. Mus. (Nat. Hist.) Zool. Suppl. 4, 1-245
Description Hayward, B., W., Hollis, C., Grenfell., H., 1997, New Zealand Geol. Surv. Paleontol. Bull., 72, Institute of Geological and Nuclear Sciences monograph 16.

General description

Test with evenly rounded outline, becoming lobulate in later part; periphery broadly rounded to sub-acute; septal bridges long, evenly spaced, numerous.

Representative pictures

2 specimens