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Home Latest Update :  3 Tuesday April 2012
Other Genus
OrderFORAMINIFERIDA
Sub OrderMILIOLINA
Super FamilyCORNUSPIRACEA
FamilyOPHTHALMIDIIDAE
Genus SPIROPHTHALMIDIUM


SPIROPHTHALMIDIUM Cushman, 1927
 
 
Type species: Spiroloculina acutimargo Brady, 1884 (*344), p. 154; OD.
Spiropthalmidium Cushman. 1927 (*742), p. 37, 39 (nom. imperf.).
Spirophthalmidium Paalzow, 1932 (*2323), p. 99 (nom. corr.).
Test free, flattened, ovate to fusiform, periphery carinate, globular proloculus followed by undivided cornuspirine enrolled second cham­ber, and then by two chambers per whorl, planispiral, the chamber lumen narrow, that of successive chambers separated by plate-like shell material like that of the peripheral keel; wall calcareous, imperforate, porcelaneous; aperture rounded to ovate, at the open end of the final chamber. Holocene; cosmopolitan.
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