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Genus: | Rotorboides Sellier de Civrieux, 1977 |
Rotorboides is a genus of recent (Holocene) bottom dwelling (benthic) forams from the Atlantic, Pacific and Indian Oceans, related to Rosalina .
The test is trochospiral and planoconvex, with a broadly rounded periphery and about six to nine chambers in the final whorl. Sutures on the spiral side are crescentic and strongly oblique. Chambers on the umbilical side are subtriangular, each with a triangular folium, or flap, that extends into the umbilical area, folia of successive chambers fuse to form an umbilical plate that is solid or has only rare perforations. Sutures on the umbilical side are radial and deeply incised. The test wall is calcareous, coarsely perforate on the spiral side, but imperforate adjacent to the sutures. The umbilical side is imperforate and smooth. The aperture is an interiomarginal arch, outside the umbilicus, extending nearly to the periphery.
Diloma coracinum is a species of small sea snail, a marine gastropod mollusc in the family Trochidae, the top snails. The Māori name is māihi.
Bolma rugosa is a species of large sea snail in the family Turbinidae, the turban snails. It occurs in the eastern Atlantic Ocean and in the Mediterranean Sea.
Danilia telebathia is a species of small sea snail, a marine gastropod mollusc in the family Chilodontaidae.
Calliostoma zizyphinum, common name the European painted top shell, is a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae.
Discorbacea, Discorboidea in recent taxonomies, is a superfamily of foraminifera,, with a range extending from the Middle Triassic to the present, characterized by chambers arranged in a low trochspiral; an umbilical or interiomarginal aperture, with or without supplementary apertures; and a wall structure that is optically radial.
Abathomphalus is a genus of foraminifera included in the Globotruncanid family.
Uvanilla olivacea, common name the blood-spotted star shell, is a species of sea snail, a marine gastropod mollusk in the family Turbinidae, the turban snails.
Cibicides is a genus of cosmopolitan benthic foraminifera known from at least as far back as the Paleocene that extends down to the present.
Rosalina is a genus of foraminifera included in the rotaliid family Rosalinidae.
Neoconorbina is a genus of recent (Holocene) discorbacean foraminifers related to Rosalina with a low conical trochoidal test, circular in outline. The conical side is the spiral side, on which all three whorls are visible, the final chamber taking up most of the periphery. The umbilical side is flat to concave. exposing only the three to four chambers of the final whorl around an open umbilicus. Chambers on the umbilical side have triangular to platelike umbilical extensions as with other rasalinids. The wall of is calcite, finely and densely perforate on the spiral side, more coarsely perforate on the umbilical side; surface smooth; aperture at the umbilical margin of the chamber, beneath the platelike extension, or folium.
Fabiania is a genus of large fossil benthic calcareous forams with a range extending from the Upper Paleocene to the Upper Eocene.
Buccella is a genus of late Cenozoic benthic foraminifera that made its first appearance during the Oligocene and is found living in recent oceans.
Halenia is a genus of recent discorbacean foraminifera. It contains only one species, Halenia legrandi The test is free, a low trochspire with a rounded periphery; wall calcareous, monolamellar. Chambers are subglobular, all visible on spiral side, only last volution visible on umbilical side; final chamber with an umbilical flap. Sutures are depressed, radial on umbilical side, curved to sinuate on spiral side, with sutural slits on both sides.
Roseaplagis artizona is a species of sea snail in the family Trochidae, the top snails.
Prothalotia ramburi, common name Rambur's jewel top shell, is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.
Calliostoma nepheloide, common name the Nephelo top shell, is a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae.
Gansserina is a genus of planktonic foraminifera, included in the globigerinid family Globotruncanidae, that had a fairly wide distribution in the Late Cretaceous (Maastrichtian). The type species is Gansserina gansseri.
Cantharidus bisbalteatus is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.
Amphistegina is a genus of foraminiferal protists included in the Rotaliida with a stratigraphic range extending from the Eocene to recent and a cosmopolitan distribution. The test is an asymmetrically biconvex trochospiral that may be bi-involute or partially evolute on the spiral side. Chambers are numerous, broad. and low, strongly curved back at the periphery to form chamber prolongations. The umbilical side is stellate, like that of Asterigerina, and has a distinct umbilical plug. The wall is calcareous, optically radial; the surface finely perforate and smooth overall. The periphery angular to carinate (keeled); the aperture an interiomarginal slit on the umbilical side, bordered by a lip.
Alvania vinosula is an extinct species of minute sea snail, a marine gastropod mollusc or micromollusk in the family Rissoidae.