''Sornayina'' is a genus of

benthic The benthic zone is the ecological region at the lowest level of a body of water such as an ocean, lake, or stream, including the sediment surface and some sub-surface layers. The name comes from the Ancient Greek word (), meaning "the depths". ...

forams from the Upper Cretaceous (Coniacian) of

France France, officially the French Republic, is a country located primarily in Western Europe. Overseas France, Its overseas regions and territories include French Guiana in South America, Saint Pierre and Miquelon in the Atlantic Ocean#North Atlan ...

included in the Spirocyclinidae. The test is planispirally to slightly asymmetrically coiled, rarely becoming straighter. Microspheric tests reach as much as 3mm in diameter, megalospheric ones are somewhat smaller. Chambers are numerous and are divided into chamberlets by secondary septa. A.R.Loeblich & H.Tappan 1964. Sarcodina, Chiefly "Thecamoebians" and Foraminiferida. Treatise on Invertebrate Paleontology, Part C, Protista 2.

References

Loftusiida Prehistoric Foraminifera genera Radiolarian genera {{foraminifera-stub