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Home Latest Update :  3 Tuesday April 2012
Other Genus
OrderFORAMINIFERIDA
Sub OrderMILIOLINA
Super FamilyMILIOLACEA
FamilyMILIOLIDAE
Sub FamilyMILIOLINAE
Genus PICOUINA

PICOUINA Andersen, 1984
 
 
Type species: Triloculina mississippiensis Cushman, 1935 (*776), p. 25; OD.
Picouina Andersen. 1984 (*35), p. 14.Test small, elongate fusiform in outline, ovoid in section, chambers one-half coil in length in cryptoquinqueloculine arrangement,may have only three chambers visible from the exterior, but sutures are obscured by sur­face costae and pits: wall calcareous, porcelaneous, surface with numerous large pits or pseudopores aligned between the longitu­dinal costae; aperture terminal, rounded, at the produced end of the final chamber. M. Oligocene (Rupelian); USA: Mississippi.
 
Remarks: Picouina was stated to have a terminal cribrate aperture, based on a specimen illustrated in SEM. However, this illus­tration shows only the numerous costae and pits at the top of the slightly arched final chamber and a simple rounded to ovate open­ing at one side similar to that illustrated for the holotype.
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