Robertinida

Image source: Höglund, H. 1947. Foraminifera in the Gullmar fjord and the Skagerak. Zoologiska Bidrag från Uppsala 26: 1-328 + 32 pls. Uploaded with written permission from the copyright owners Annalena Höglund and Jan Höglund.

Image source: Höglund, H. 1947. Foraminifera in the Gullmar fjord and the Skagerak. Zoologiska Bidrag från Uppsala 26: 1-328 + 32 pls. Uploaded with written permission from the copyright owners Annalena Höglund and Jan Höglund.

Image source: Höglund, H. 1947. Foraminifera in the Gullmar fjord and the Skagerak. Zoologiska Bidrag från Uppsala 26: 1-328 + 32 pls. Uploaded with written permission from the copyright owners Annalena Höglund and Jan Höglund.

Robertina subcylindrica sensu Jones, R.W. 1994. The Challenger Foraminifera. Image source: Brady, H.B. (1884) Pl. 50

Image source: Cushman, J.A. 1942. The Foraminifera of the Tropical Pacific Collections of the ”Albatross”. Part 3. Heterohelicidae to Buliminidae. Bull. U.S. Nation. Mus 161: v+67 pp.+15 pls.

Image source: Cushman, J.A. 1931. The Foraminifera of the Atlantic Ocean. Part 8. Rotaliidae, Amphisteginidae, Calcarinidae, Cymbaloporettidae, Globorotaliidae, Anomalinidae, Planorbulinidae, Rupertiidae and Homotremidae. Bull. U.S. Natl. Mus. 104.

Image source: Cushman, J.A. 1931. The Foraminifera of the Atlantic Ocean. Part 8. Rotaliidae, Amphisteginidae, Calcarinidae, Cymbaloporettidae, Globorotaliidae, Anomalinidae, Planorbulinidae, Rupertiidae and Homotremidae. Bull. U.S. Natl. Mus. 104.

Palmer, D. K.; Bermúdez, P. J. (1936). Late Tertiary foraminifera from the Matanzas Bay region, Cuba. Memorias de la Sociedad. Cubana de Historia Natural ''Felipe Poey". v. 9, p. 237–257., available online at (http://www.redciencia.cu/geobiblio/paper/1936_PJBermudez__Late%20terc%20foram%20matanzas%20Cuba.pdf) page(s): p. 253 pl. 22 fig. 1-3, 5

Palmer, D. K.; Bermúdez, P. J. (1936). Late Tertiary foraminifera from the Matanzas Bay region, Cuba. Memorias de la Sociedad. Cubana de Historia Natural ''Felipe Poey". v. 9, p. 237–257., available online at (http://www.redciencia.cu/geobiblio/paper/1936_PJBermudez__Late%20terc%20foram%20matanzas%20Cuba.pdf) page(s): p. 253 pl. 22 fig. 1-3, 5

Robertinoides oceanicus sensu Jones, R.W. 1994. The Challenger Foraminifera. Image source: Brady, H.B. (1884) Pl. 50

Lamarckina ventricosa sensu Jones, R.W. 1994. The Challenger Foraminifera. Image source: Brady, H.B. (1884) Pl. 91

Image source: Cushman, J.A. 1931. The Foraminifera of the Atlantic Ocean. Part 8. Rotaliidae, Amphisteginidae, Calcarinidae, Cymbaloporettidae, Globorotaliidae, Anomalinidae, Planorbulinidae, Rupertiidae and Homotremidae. Bull. U.S. Natl. Mus. 104.

Geminospira bradyi sensu Jones, R.W. 1994. The Challenger Foraminifera. Image source: Brady, H.B. (1884) Pl. 113

Description.Test trochospiral, unequally biconvex, subcircular in outline recognized easily by its clear wall showing a cloudy mottling under a light microscope; spiral side evolute, slightly convex; umbilical side involute, more strongly convex; peripheral margin strongly keeled; on the spiral side, sutures flush, indistinct, obscured by irregularly distributed, low tubercles; on the umbilical side, 7-9 somewhat inflated chambers with depressed and nearly radiate sutures; wall finely perforated on both sides; apertural face truncate, with an acute, nearly keeled border; aperture one or two small openings at the base of the apertural chamber and a long slit-like peripheral opening parallel to the margin and provided with a prominent inner lip, still visible on the last 3 or 4 chambers.

Discription to come

Image of the holotype. The test is 1.7 mm. long. This species has also been assigned to the genus Robertina. Image courtesy of David B. Scott, Dalhousie University.   This image was originally published in Palaeologica Electronica, vol. 3, issue 2, and is used with the kind permission of that journal and the Paleontological Association.

Image of the holotype, from the apertural edge. Test is 0.61 mm. in its long dimension. Image courtesy of David B. Scott, Dalhousie University.   This image was originally published in Palaeologica Electronica, vol. 3, issue 2, and is used with the kind permission of that journal and the Paleontological Association.